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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Zia Mehrabi; Ruth Delzeit; Adriana Ignaciuk; Christian Levers; +46 Authors

    Les événements extrêmes, tels que ceux causés par le changement climatique, les chocs économiques ou géopolitiques et les épidémies de ravageurs ou de maladies, menacent la sécurité alimentaire mondiale. La complexité de la causalité, ainsi que la myriade de façons dont un événement, ou une séquence d'événements, crée des impacts en cascade et systémiques, posent des défis importants à la recherche sur les systèmes alimentaires et aux politiques. Pour identifier les risques prioritaires pour la sécurité alimentaire et les opportunités de recherche, nous avons demandé à des experts de divers domaines et régions géographiques de décrire les principales menaces pour la sécurité alimentaire mondiale au cours des deux prochaines décennies et de suggérer des questions et des lacunes de recherche clés sur ce sujet. Nous présentons ici une hiérarchisation des menaces à la sécurité alimentaire mondiale résultant d'événements extrêmes, ainsi que des questions de recherche émergentes qui mettent en évidence les défis conceptuels et pratiques qui existent dans la conception, l'adoption et la gouvernance de systèmes alimentaires résilients. Nous espérons que ces résultats aideront à orienter le financement de la recherche et les ressources vers les transformations du système alimentaire nécessaires pour aider la société à faire face aux principaux risques du système alimentaire et à l'insécurité alimentaire en cas d'événements extrêmes. Los eventos extremos, como los causados por el cambio climático, las crisis económicas o geopolíticas y las epidemias de plagas o enfermedades, amenazan la seguridad alimentaria mundial. La complejidad de la causalidad, así como las innumerables formas en que un evento, o una secuencia de eventos, crea impactos en cascada y sistémicos, plantea desafíos significativos para la investigación y las políticas de los sistemas alimentarios por igual. Para identificar los riesgos prioritarios para la seguridad alimentaria y las oportunidades de investigación, pedimos a expertos de una variedad de campos y geografías que describieran las amenazas clave para la seguridad alimentaria mundial en las próximas dos décadas y que sugirieran preguntas y brechas clave de investigación sobre este tema. Aquí, presentamos una priorización de las amenazas a la seguridad alimentaria mundial derivadas de eventos extremos, así como preguntas de investigación emergentes que resaltan los desafíos conceptuales y prácticos que existen para diseñar, adoptar y gobernar sistemas alimentarios resilientes. Esperamos que estos hallazgos ayuden a dirigir la financiación de la investigación y los recursos hacia las transformaciones del sistema alimentario necesarias para ayudar a la sociedad a abordar los principales riesgos del sistema alimentario y la inseguridad alimentaria en situaciones extremas. Extreme events, such as those caused by climate change, economic or geopolitical shocks, and pest or disease epidemics, threaten global food security. The complexity of causation, as well as the myriad ways that an event, or a sequence of events, creates cascading and systemic impacts, poses significant challenges to food systems research and policy alike. To identify priority food security risks and research opportunities, we asked experts from a range of fields and geographies to describe key threats to global food security over the next two decades and to suggest key research questions and gaps on this topic. Here, we present a prioritization of threats to global food security from extreme events, as well as emerging research questions that highlight the conceptual and practical challenges that exist in designing, adopting, and governing resilient food systems. We hope that these findings help in directing research funding and resources toward food system transformations needed to help society tackle major food system risks and food insecurity under extreme events. وتهدد الأحداث المتطرفة، مثل تلك الناجمة عن تغير المناخ والصدمات الاقتصادية أو الجيوسياسية وأوبئة الآفات أو الأمراض، الأمن الغذائي العالمي. إن تعقيد السببية، فضلاً عن الطرق التي لا تعد ولا تحصى التي يخلق بها الحدث، أو سلسلة من الأحداث، تأثيرات متتالية ومنهجية، تشكل تحديات كبيرة لبحوث وسياسات النظم الغذائية على حد سواء. لتحديد مخاطر الأمن الغذائي ذات الأولوية وفرص البحث، طلبنا من خبراء من مجموعة من المجالات والمناطق الجغرافية وصف التهديدات الرئيسية للأمن الغذائي العالمي على مدى العقدين المقبلين واقتراح أسئلة وثغرات بحثية رئيسية حول هذا الموضوع. هنا، نقدم أولوية للتهديدات التي يتعرض لها الأمن الغذائي العالمي من الأحداث المتطرفة، بالإضافة إلى أسئلة البحث الناشئة التي تسلط الضوء على التحديات المفاهيمية والعملية الموجودة في تصميم وتبني وإدارة النظم الغذائية المرنة. نأمل أن تساعد هذه النتائج في توجيه تمويل البحوث والموارد نحو تحولات النظام الغذائي اللازمة لمساعدة المجتمع على معالجة المخاطر الرئيسية للنظام الغذائي وانعدام الأمن الغذائي في ظل الأحداث المتطرفة.

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ COREarrow_drop_down
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    One Earth
    Article . 2022 . Peer-reviewed
    License: CC BY
    Data sources: Crossref
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    MPG.PuRe
    Article . 2022
    Data sources: MPG.PuRe
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    edoc
    Article . 2022 . Peer-reviewed
    Data sources: edoc
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    HAL INRAE
    Article . 2022
    Data sources: HAL INRAE
    https://dx.doi.org/10.5451/uni...
    Other literature type . 2022
    Data sources: Datacite
    https://dx.doi.org/10.60692/43...
    Other literature type . 2022
    Data sources: Datacite
    https://dx.doi.org/10.60692/mm...
    Other literature type . 2022
    Data sources: Datacite
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    EconStor
    Article . 2022
    License: CC BY
    Data sources: EconStor
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Corey Lesk; Navin Ramankutty; Navin Ramankutty; Pedram Rowhani;

    In recent years, a number of extreme weather disasters (EWDs) have partially or completely damaged regional crop production1–5. While detailed regional accounts of the impacts of EWDs exist, the global scale impacts of droughts, floods, and extreme temperature events on crop production are yet to be quantified. Here we estimate for the first time national cereal production losses across the globe resulting from reported extreme weather events over 1964-2007. We find that droughts and extreme heat events significantly reduced national cereal production by 9-10%, while our analysis could not identify a global impact from floods and extreme cold events. Analyzing the underlying processes, we find that production losses due to droughts were associated with a reduction in both harvested area and yields whereas extreme heat mainly decreased cereal yields. Additionally, the results highlight ~7% greater production impacts from more recent droughts and 8-11% more damage in developed countries compared to developing ones. Our findings may help guide agricultural priorities in international disaster risk reduction and adaptation efforts.

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ cIRclearrow_drop_down
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    cIRcle
    Article . 2016
    License: CC BY NC ND
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Nature
    Article
    License: CC BY NC ND
    Data sources: UnpayWall
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Nature
    Article . 2016 . Peer-reviewed
    License: Springer TDM
    Data sources: Crossref
    https://dx.doi.org/10.14288/1....
    Other literature type . 2019
    Data sources: Datacite
    Nature
    Article . 2016
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ cIRclearrow_drop_down
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      cIRcle
      Article . 2016
      License: CC BY NC ND
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      Nature
      Article
      License: CC BY NC ND
      Data sources: UnpayWall
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
      Nature
      Article . 2016 . Peer-reviewed
      License: Springer TDM
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      https://dx.doi.org/10.14288/1....
      Other literature type . 2019
      Data sources: Datacite
      Nature
      Article . 2016
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Andrew Bowell; Edward E. Salakpi; Kiswendsida Guigma; James M. Muthoka; +2 Authors

    Abstract Drought is a complex natural hazard that can occur in any climate and affect every aspect of society. To better prepare and mitigate the impacts of drought, various indicators can be applied to monitor and forecast its onset, intensity, and severity. Though widely used, little is known about the efficacy of these indicators which restricts their role in important decisions. Here, we provide the first validation of 11 commonly-used drought indicators by comparing them to pasture and browse condition data collected on the ground in Kenya. These ground-based data provide an absolute and relative assessment of the conditions, similar to some of the drought indicators. Focusing on grass and shrublands of the arid and semi-arid lands, we demonstrate there are strong relationships between ground-based pasture and browse conditions, and satellite-based drought indicators. The soil adjusted vegetation index has the best relationship, achieving a mean r 2 score of 0.70 when fitted against absolute pasture condition. Similarly, the 3-month vegetation health index reached a mean r 2 score of 0.62 when fitted against a relative pasture condition. In addition, we investigated the Kenya-wide drought onset threshold for the 3-month average vegetation condition index (VCI3M; VCI3M < 35), which is used by the country’s drought early warning system. Our results show large disparities in thresholds across different counties. Understanding these relationships and thresholds are integral to developing effective and efficient drought early warning systems. Our work offers evidence for the effectiveness of some of these indicators as well as practical thresholds for their use.

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ COREarrow_drop_down
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    Environmental Research Letters
    Article . 2021 . Peer-reviewed
    License: CC BY
    Data sources: Crossref
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Environmental Research Letters
    Article
    License: CC BY
    Data sources: UnpayWall
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    ZENODO
    Article . 2021
    License: CC BY
    Data sources: ZENODO
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    ZENODO
    Article . 2021
    License: CC BY
    Data sources: Datacite
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    ZENODO
    Article . 2021
    License: CC BY
    Data sources: Datacite
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Environmental Research Letters
    Article . 2021
    Data sources: DOAJ
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    https://dx.doi.org/10.60692/b8...
    Other literature type . 2021
    Data sources: Datacite
    https://dx.doi.org/10.60692/p5...
    Other literature type . 2021
    Data sources: Datacite
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ COREarrow_drop_down
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      Environmental Research Letters
      Article . 2021 . Peer-reviewed
      License: CC BY
      Data sources: Crossref
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      Environmental Research Letters
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      ZENODO
      Article . 2021
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      ZENODO
      Article . 2021
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      Data sources: Datacite
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      ZENODO
      Article . 2021
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      Environmental Research Letters
      Article . 2021
      Data sources: DOAJ
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      https://dx.doi.org/10.60692/b8...
      Other literature type . 2021
      Data sources: Datacite
      https://dx.doi.org/10.60692/p5...
      Other literature type . 2021
      Data sources: Datacite
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    Authors: Martellozzo F.; Landry J.-S.; Plouffe D.; Seufert V.; +2 Authors

    Urban agriculture (UA) has been drawing a lot of attention recently for several reasons: the majority of the world population has shifted from living in rural to urban areas; the environmental impact of agriculture is a matter of rising concern; and food insecurity, especially the accessibility of food, remains a major challenge. UA has often been proposed as a solution to some of these issues, for example by producing food in places where population density is highest, reducing transportation costs, connecting people directly to food systems and using urban areas efficiently. However, to date no study has examined how much food could actually be produced in urban areas at the global scale. Here we use a simple approach, based on different global-scale datasets, to assess to what extent UA is constrained by the existing amount of urban space. Our results suggest that UA would require roughly one third of the total global urban area to meet the global vegetable consumption of urban dwellers. This estimate does not consider how much urban area may actually be suitable and available for UA, which likely varies substantially around the world and according to the type of UA performed. Further, this global average value masks variations of more than two orders of magnitude among individual countries. The variations in the space required across countries derive mostly from variations in urban population density, and much less from variations in yields or per capita consumption. Overall, the space required is regrettably the highest where UA is most needed, i.e., in more food insecure countries. We also show that smaller urban clusters (i.e., <100 km2 each) together represent about two thirds of the global urban extent; thus UA discourse and policies should not focus on large cities exclusively, but should also target smaller urban areas that offer the greatest potential in terms of physical space.

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    CORE
    Article . 2014
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    Environmental Research Letters
    Article . 2014 . Peer-reviewed
    License: CC BY
    Data sources: Crossref
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    Environmental Research Letters
    Article
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    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    https://dx.doi.org/10.5445/ir/...
    Article . 2014
    License: CC BY
    Data sources: Datacite
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Environmental Research Letters
    Article . 2014
    Data sources: DOAJ
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    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ COREarrow_drop_down
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      CORE
      Article . 2014
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      Environmental Research Letters
      Article . 2014 . Peer-reviewed
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      Environmental Research Letters
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      https://dx.doi.org/10.5445/ir/...
      Article . 2014
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      Data sources: Datacite
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      Environmental Research Letters
      Article . 2014
      Data sources: DOAJ
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Victoria L. Boult; Emily Black; Halima Saado Abdillahi; Meghan Bailey; +10 Authors

    Las vidas y los medios de subsistencia de las personas en todo el mundo están cada vez más amenazados por los riesgos relacionados con el clima a medida que el cambio climático aumenta la frecuencia y la gravedad del clima de alto impacto. A su vez, el riesgo de que se produzcan múltiples peligros simultáneamente aumenta y los impactos compuestos se vuelven más probables. La Organización Meteorológica Mundial (OMM) propuso el uso de pronósticos basados en impactos de múltiples peligros (IbF) para anticipar y reducir mejor los impactos de los peligros concurrentes, pero hasta el momento, hay pocos ejemplos operativos en el sector humanitario. La sequía es particularmente susceptible a influencias de múltiples peligros. Sin embargo, los desafíos encontrados en el desarrollo de sistemas IbF de sequía, incluida la falta de comprensión de los impactos compuestos y los mandatos específicos centrados en los peligros, plantean preguntas importantes para la viabilidad de IbF de múltiples peligros según lo previsto por la OMM. Con estos desafíos en mente, proponemos un enfoque provisional en el que la evaluación en tiempo real de la vulnerabilidad dinámica proporciona un contexto para el IbF basado en la sequía. La incorporación de indicadores dinámicos de vulnerabilidad da cuenta de los efectos locales de los peligros no relacionados con la sequía, mientras que el uso de un sistema basado en la sequía facilita una intervención efectiva. El enfoque propuesto mejorará nuestra comprensión de los eventos compuestos, mejorará la adopción de IbF en el sector humanitario y mitigará mejor los impactos de los peligros concurrentes. La vie et les moyens de subsistance des populations du monde entier sont de plus en plus menacés par les risques liés au climat, car le changement climatique augmente la fréquence et la gravité des phénomènes météorologiques à fort impact. À son tour, le risque que plusieurs dangers se produisent simultanément augmente et que les impacts composés deviennent plus probables. L'Organisation météorologique mondiale (OMM) a proposé l'utilisation de prévisions basées sur les impacts multirisques (IbF) pour mieux anticiper et réduire les impacts des risques simultanés, mais il existe encore peu d'exemples opérationnels dans le secteur humanitaire. La sécheresse est particulièrement sensible aux influences multirisques. Cependant, les défis rencontrés dans le développement des systèmes IbF de sécheresse – y compris une mauvaise compréhension des impacts composés et des mandats spécifiques axés sur les risques – soulèvent des questions importantes pour la faisabilité des IbF multirisques tels qu'envisagés par l'OMM. Avec ces défis à l'esprit, nous proposons une approche intérimaire dans laquelle l'évaluation en temps réel de la vulnérabilité dynamique fournit un contexte pour l'IBC basée sur la sécheresse. L'incorporation d'indicateurs de vulnérabilité dynamiques tient compte des effets locaux des dangers autres que la sécheresse, tandis que l'utilisation d'un système basé sur la sécheresse facilite une intervention efficace. L'approche proposée améliorera notre compréhension des événements complexes, améliorera l'adoption d'IbF dans le secteur humanitaire et atténuera mieux les impacts des risques concomitants. The lives and livelihoods of people around the world are increasingly threatened by climate-related risks as climate change increases the frequency and severity of high-impact weather. In turn, the risk of multiple hazards occurring simultaneously grows and compound impacts become more likely. The World Meteorological Organization (WMO) proposed the use of multi-hazard impact-based forecasting (IbF) to better anticipate and reduce the impacts of concurrent hazards, but as yet, there are few operational examples in the humanitarian sector. Drought is particularly susceptible to multi-hazard influences. However, challenges encountered in the development of drought IbF systems – including poor understanding of compound impacts and specific hazard-focused mandates – raise important questions for the feasibility of multi-hazard IbF as envisioned by the WMO. With these challenges in mind, we propose an interim approach in which real-time assessment of dynamic vulnerability provides a context for drought-based IbF. The incorporation of dynamic vulnerability indicators account for the local effects of non-drought hazards, whilst the use of a drought-based system facilitates effective intervention. The proposed approach will improve our understanding of compound events, enhance adoption of IbF in the humanitarian sector, and better mitigate the impacts of concurrent hazards. تتعرض حياة الناس وسبل عيشهم في جميع أنحاء العالم لتهديد متزايد بسبب المخاطر المتعلقة بالمناخ حيث يزيد تغير المناخ من تواتر وشدة الطقس شديد التأثير. في المقابل، يزداد خطر حدوث مخاطر متعددة في وقت واحد وتصبح التأثيرات المركبة أكثر احتمالًا. اقترحت المنظمة العالمية للأرصاد الجوية (WMO) استخدام التنبؤ القائم على التأثير متعدد المخاطر (IbF) لتوقع آثار المخاطر المتزامنة والحد منها بشكل أفضل، ولكن حتى الآن، هناك عدد قليل من الأمثلة التشغيلية في القطاع الإنساني. الجفاف عرضة بشكل خاص للتأثيرات متعددة المخاطر. ومع ذلك، فإن التحديات التي ووجهت في تطوير أنظمة إيبف الجفاف – بما في ذلك سوء فهم الآثار المركبة والتفويضات المحددة التي تركز على المخاطر – تثير أسئلة مهمة حول جدوى إيبف متعددة المخاطر على النحو المتوخى من قبل المنظمة العالمية للأرصاد الجوية. مع وضع هذه التحديات في الاعتبار، نقترح نهجًا مؤقتًا يوفر فيه التقييم في الوقت الفعلي للضعف الديناميكي سياقًا لـ IbF القائم على الجفاف. إن دمج مؤشرات الضعف الديناميكية يفسر الآثار المحلية لمخاطر غير الجفاف، في حين أن استخدام نظام قائم على الجفاف يسهل التدخل الفعال. سيحسن النهج المقترح فهمنا للأحداث المركبة، ويعزز اعتماد IbF في القطاع الإنساني، ويخفف بشكل أفضل من آثار المخاطر المتزامنة.

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    Climate Risk Management
    Article . 2022 . Peer-reviewed
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    Climate Risk Management
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    Climate Risk Management
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    https://dx.doi.org/10.60692/cn...
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ COREarrow_drop_down
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      Climate Risk Management
      Article . 2022 . Peer-reviewed
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      Climate Risk Management
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      Climate Risk Management
      Article . 2022
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      https://dx.doi.org/10.60692/cn...
      Other literature type . 2022
      Data sources: Datacite
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5 Research products
  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Zia Mehrabi; Ruth Delzeit; Adriana Ignaciuk; Christian Levers; +46 Authors

    Les événements extrêmes, tels que ceux causés par le changement climatique, les chocs économiques ou géopolitiques et les épidémies de ravageurs ou de maladies, menacent la sécurité alimentaire mondiale. La complexité de la causalité, ainsi que la myriade de façons dont un événement, ou une séquence d'événements, crée des impacts en cascade et systémiques, posent des défis importants à la recherche sur les systèmes alimentaires et aux politiques. Pour identifier les risques prioritaires pour la sécurité alimentaire et les opportunités de recherche, nous avons demandé à des experts de divers domaines et régions géographiques de décrire les principales menaces pour la sécurité alimentaire mondiale au cours des deux prochaines décennies et de suggérer des questions et des lacunes de recherche clés sur ce sujet. Nous présentons ici une hiérarchisation des menaces à la sécurité alimentaire mondiale résultant d'événements extrêmes, ainsi que des questions de recherche émergentes qui mettent en évidence les défis conceptuels et pratiques qui existent dans la conception, l'adoption et la gouvernance de systèmes alimentaires résilients. Nous espérons que ces résultats aideront à orienter le financement de la recherche et les ressources vers les transformations du système alimentaire nécessaires pour aider la société à faire face aux principaux risques du système alimentaire et à l'insécurité alimentaire en cas d'événements extrêmes. Los eventos extremos, como los causados por el cambio climático, las crisis económicas o geopolíticas y las epidemias de plagas o enfermedades, amenazan la seguridad alimentaria mundial. La complejidad de la causalidad, así como las innumerables formas en que un evento, o una secuencia de eventos, crea impactos en cascada y sistémicos, plantea desafíos significativos para la investigación y las políticas de los sistemas alimentarios por igual. Para identificar los riesgos prioritarios para la seguridad alimentaria y las oportunidades de investigación, pedimos a expertos de una variedad de campos y geografías que describieran las amenazas clave para la seguridad alimentaria mundial en las próximas dos décadas y que sugirieran preguntas y brechas clave de investigación sobre este tema. Aquí, presentamos una priorización de las amenazas a la seguridad alimentaria mundial derivadas de eventos extremos, así como preguntas de investigación emergentes que resaltan los desafíos conceptuales y prácticos que existen para diseñar, adoptar y gobernar sistemas alimentarios resilientes. Esperamos que estos hallazgos ayuden a dirigir la financiación de la investigación y los recursos hacia las transformaciones del sistema alimentario necesarias para ayudar a la sociedad a abordar los principales riesgos del sistema alimentario y la inseguridad alimentaria en situaciones extremas. Extreme events, such as those caused by climate change, economic or geopolitical shocks, and pest or disease epidemics, threaten global food security. The complexity of causation, as well as the myriad ways that an event, or a sequence of events, creates cascading and systemic impacts, poses significant challenges to food systems research and policy alike. To identify priority food security risks and research opportunities, we asked experts from a range of fields and geographies to describe key threats to global food security over the next two decades and to suggest key research questions and gaps on this topic. Here, we present a prioritization of threats to global food security from extreme events, as well as emerging research questions that highlight the conceptual and practical challenges that exist in designing, adopting, and governing resilient food systems. We hope that these findings help in directing research funding and resources toward food system transformations needed to help society tackle major food system risks and food insecurity under extreme events. وتهدد الأحداث المتطرفة، مثل تلك الناجمة عن تغير المناخ والصدمات الاقتصادية أو الجيوسياسية وأوبئة الآفات أو الأمراض، الأمن الغذائي العالمي. إن تعقيد السببية، فضلاً عن الطرق التي لا تعد ولا تحصى التي يخلق بها الحدث، أو سلسلة من الأحداث، تأثيرات متتالية ومنهجية، تشكل تحديات كبيرة لبحوث وسياسات النظم الغذائية على حد سواء. لتحديد مخاطر الأمن الغذائي ذات الأولوية وفرص البحث، طلبنا من خبراء من مجموعة من المجالات والمناطق الجغرافية وصف التهديدات الرئيسية للأمن الغذائي العالمي على مدى العقدين المقبلين واقتراح أسئلة وثغرات بحثية رئيسية حول هذا الموضوع. هنا، نقدم أولوية للتهديدات التي يتعرض لها الأمن الغذائي العالمي من الأحداث المتطرفة، بالإضافة إلى أسئلة البحث الناشئة التي تسلط الضوء على التحديات المفاهيمية والعملية الموجودة في تصميم وتبني وإدارة النظم الغذائية المرنة. نأمل أن تساعد هذه النتائج في توجيه تمويل البحوث والموارد نحو تحولات النظام الغذائي اللازمة لمساعدة المجتمع على معالجة المخاطر الرئيسية للنظام الغذائي وانعدام الأمن الغذائي في ظل الأحداث المتطرفة.

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ COREarrow_drop_down
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    One Earth
    Article . 2022 . Peer-reviewed
    License: CC BY
    Data sources: Crossref
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    MPG.PuRe
    Article . 2022
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    edoc
    Article . 2022 . Peer-reviewed
    Data sources: edoc
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    HAL INRAE
    Article . 2022
    Data sources: HAL INRAE
    https://dx.doi.org/10.5451/uni...
    Other literature type . 2022
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    https://dx.doi.org/10.60692/43...
    Other literature type . 2022
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    https://dx.doi.org/10.60692/mm...
    Other literature type . 2022
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    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    EconStor
    Article . 2022
    License: CC BY
    Data sources: EconStor
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Corey Lesk; Navin Ramankutty; Navin Ramankutty; Pedram Rowhani;

    In recent years, a number of extreme weather disasters (EWDs) have partially or completely damaged regional crop production1–5. While detailed regional accounts of the impacts of EWDs exist, the global scale impacts of droughts, floods, and extreme temperature events on crop production are yet to be quantified. Here we estimate for the first time national cereal production losses across the globe resulting from reported extreme weather events over 1964-2007. We find that droughts and extreme heat events significantly reduced national cereal production by 9-10%, while our analysis could not identify a global impact from floods and extreme cold events. Analyzing the underlying processes, we find that production losses due to droughts were associated with a reduction in both harvested area and yields whereas extreme heat mainly decreased cereal yields. Additionally, the results highlight ~7% greater production impacts from more recent droughts and 8-11% more damage in developed countries compared to developing ones. Our findings may help guide agricultural priorities in international disaster risk reduction and adaptation efforts.

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ cIRclearrow_drop_down
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    cIRcle
    Article . 2016
    License: CC BY NC ND
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Nature
    Article
    License: CC BY NC ND
    Data sources: UnpayWall
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Nature
    Article . 2016 . Peer-reviewed
    License: Springer TDM
    Data sources: Crossref
    https://dx.doi.org/10.14288/1....
    Other literature type . 2019
    Data sources: Datacite
    Nature
    Article . 2016
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ cIRclearrow_drop_down
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      cIRcle
      Article . 2016
      License: CC BY NC ND
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      Nature
      Article
      License: CC BY NC ND
      Data sources: UnpayWall
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
      Nature
      Article . 2016 . Peer-reviewed
      License: Springer TDM
      Data sources: Crossref
      https://dx.doi.org/10.14288/1....
      Other literature type . 2019
      Data sources: Datacite
      Nature
      Article . 2016
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Andrew Bowell; Edward E. Salakpi; Kiswendsida Guigma; James M. Muthoka; +2 Authors

    Abstract Drought is a complex natural hazard that can occur in any climate and affect every aspect of society. To better prepare and mitigate the impacts of drought, various indicators can be applied to monitor and forecast its onset, intensity, and severity. Though widely used, little is known about the efficacy of these indicators which restricts their role in important decisions. Here, we provide the first validation of 11 commonly-used drought indicators by comparing them to pasture and browse condition data collected on the ground in Kenya. These ground-based data provide an absolute and relative assessment of the conditions, similar to some of the drought indicators. Focusing on grass and shrublands of the arid and semi-arid lands, we demonstrate there are strong relationships between ground-based pasture and browse conditions, and satellite-based drought indicators. The soil adjusted vegetation index has the best relationship, achieving a mean r 2 score of 0.70 when fitted against absolute pasture condition. Similarly, the 3-month vegetation health index reached a mean r 2 score of 0.62 when fitted against a relative pasture condition. In addition, we investigated the Kenya-wide drought onset threshold for the 3-month average vegetation condition index (VCI3M; VCI3M < 35), which is used by the country’s drought early warning system. Our results show large disparities in thresholds across different counties. Understanding these relationships and thresholds are integral to developing effective and efficient drought early warning systems. Our work offers evidence for the effectiveness of some of these indicators as well as practical thresholds for their use.

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ COREarrow_drop_down
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    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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    Environmental Research Letters
    Article . 2021 . Peer-reviewed
    License: CC BY
    Data sources: Crossref
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    Environmental Research Letters
    Article
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    ZENODO
    Article . 2021
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    Environmental Research Letters
    Article . 2021
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    https://dx.doi.org/10.60692/b8...
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    https://dx.doi.org/10.60692/p5...
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      Environmental Research Letters
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      Environmental Research Letters
      Article . 2021
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      https://dx.doi.org/10.60692/b8...
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    Authors: Martellozzo F.; Landry J.-S.; Plouffe D.; Seufert V.; +2 Authors

    Urban agriculture (UA) has been drawing a lot of attention recently for several reasons: the majority of the world population has shifted from living in rural to urban areas; the environmental impact of agriculture is a matter of rising concern; and food insecurity, especially the accessibility of food, remains a major challenge. UA has often been proposed as a solution to some of these issues, for example by producing food in places where population density is highest, reducing transportation costs, connecting people directly to food systems and using urban areas efficiently. However, to date no study has examined how much food could actually be produced in urban areas at the global scale. Here we use a simple approach, based on different global-scale datasets, to assess to what extent UA is constrained by the existing amount of urban space. Our results suggest that UA would require roughly one third of the total global urban area to meet the global vegetable consumption of urban dwellers. This estimate does not consider how much urban area may actually be suitable and available for UA, which likely varies substantially around the world and according to the type of UA performed. Further, this global average value masks variations of more than two orders of magnitude among individual countries. The variations in the space required across countries derive mostly from variations in urban population density, and much less from variations in yields or per capita consumption. Overall, the space required is regrettably the highest where UA is most needed, i.e., in more food insecure countries. We also show that smaller urban clusters (i.e., <100 km2 each) together represent about two thirds of the global urban extent; thus UA discourse and policies should not focus on large cities exclusively, but should also target smaller urban areas that offer the greatest potential in terms of physical space.

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    Article . 2014
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    Environmental Research Letters
    Article . 2014 . Peer-reviewed
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    Environmental Research Letters
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    https://dx.doi.org/10.5445/ir/...
    Article . 2014
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    Environmental Research Letters
    Article . 2014
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      Environmental Research Letters
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      https://dx.doi.org/10.5445/ir/...
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      Environmental Research Letters
      Article . 2014
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    Authors: Victoria L. Boult; Emily Black; Halima Saado Abdillahi; Meghan Bailey; +10 Authors

    Las vidas y los medios de subsistencia de las personas en todo el mundo están cada vez más amenazados por los riesgos relacionados con el clima a medida que el cambio climático aumenta la frecuencia y la gravedad del clima de alto impacto. A su vez, el riesgo de que se produzcan múltiples peligros simultáneamente aumenta y los impactos compuestos se vuelven más probables. La Organización Meteorológica Mundial (OMM) propuso el uso de pronósticos basados en impactos de múltiples peligros (IbF) para anticipar y reducir mejor los impactos de los peligros concurrentes, pero hasta el momento, hay pocos ejemplos operativos en el sector humanitario. La sequía es particularmente susceptible a influencias de múltiples peligros. Sin embargo, los desafíos encontrados en el desarrollo de sistemas IbF de sequía, incluida la falta de comprensión de los impactos compuestos y los mandatos específicos centrados en los peligros, plantean preguntas importantes para la viabilidad de IbF de múltiples peligros según lo previsto por la OMM. Con estos desafíos en mente, proponemos un enfoque provisional en el que la evaluación en tiempo real de la vulnerabilidad dinámica proporciona un contexto para el IbF basado en la sequía. La incorporación de indicadores dinámicos de vulnerabilidad da cuenta de los efectos locales de los peligros no relacionados con la sequía, mientras que el uso de un sistema basado en la sequía facilita una intervención efectiva. El enfoque propuesto mejorará nuestra comprensión de los eventos compuestos, mejorará la adopción de IbF en el sector humanitario y mitigará mejor los impactos de los peligros concurrentes. La vie et les moyens de subsistance des populations du monde entier sont de plus en plus menacés par les risques liés au climat, car le changement climatique augmente la fréquence et la gravité des phénomènes météorologiques à fort impact. À son tour, le risque que plusieurs dangers se produisent simultanément augmente et que les impacts composés deviennent plus probables. L'Organisation météorologique mondiale (OMM) a proposé l'utilisation de prévisions basées sur les impacts multirisques (IbF) pour mieux anticiper et réduire les impacts des risques simultanés, mais il existe encore peu d'exemples opérationnels dans le secteur humanitaire. La sécheresse est particulièrement sensible aux influences multirisques. Cependant, les défis rencontrés dans le développement des systèmes IbF de sécheresse – y compris une mauvaise compréhension des impacts composés et des mandats spécifiques axés sur les risques – soulèvent des questions importantes pour la faisabilité des IbF multirisques tels qu'envisagés par l'OMM. Avec ces défis à l'esprit, nous proposons une approche intérimaire dans laquelle l'évaluation en temps réel de la vulnérabilité dynamique fournit un contexte pour l'IBC basée sur la sécheresse. L'incorporation d'indicateurs de vulnérabilité dynamiques tient compte des effets locaux des dangers autres que la sécheresse, tandis que l'utilisation d'un système basé sur la sécheresse facilite une intervention efficace. L'approche proposée améliorera notre compréhension des événements complexes, améliorera l'adoption d'IbF dans le secteur humanitaire et atténuera mieux les impacts des risques concomitants. The lives and livelihoods of people around the world are increasingly threatened by climate-related risks as climate change increases the frequency and severity of high-impact weather. In turn, the risk of multiple hazards occurring simultaneously grows and compound impacts become more likely. The World Meteorological Organization (WMO) proposed the use of multi-hazard impact-based forecasting (IbF) to better anticipate and reduce the impacts of concurrent hazards, but as yet, there are few operational examples in the humanitarian sector. Drought is particularly susceptible to multi-hazard influences. However, challenges encountered in the development of drought IbF systems – including poor understanding of compound impacts and specific hazard-focused mandates – raise important questions for the feasibility of multi-hazard IbF as envisioned by the WMO. With these challenges in mind, we propose an interim approach in which real-time assessment of dynamic vulnerability provides a context for drought-based IbF. The incorporation of dynamic vulnerability indicators account for the local effects of non-drought hazards, whilst the use of a drought-based system facilitates effective intervention. The proposed approach will improve our understanding of compound events, enhance adoption of IbF in the humanitarian sector, and better mitigate the impacts of concurrent hazards. تتعرض حياة الناس وسبل عيشهم في جميع أنحاء العالم لتهديد متزايد بسبب المخاطر المتعلقة بالمناخ حيث يزيد تغير المناخ من تواتر وشدة الطقس شديد التأثير. في المقابل، يزداد خطر حدوث مخاطر متعددة في وقت واحد وتصبح التأثيرات المركبة أكثر احتمالًا. اقترحت المنظمة العالمية للأرصاد الجوية (WMO) استخدام التنبؤ القائم على التأثير متعدد المخاطر (IbF) لتوقع آثار المخاطر المتزامنة والحد منها بشكل أفضل، ولكن حتى الآن، هناك عدد قليل من الأمثلة التشغيلية في القطاع الإنساني. الجفاف عرضة بشكل خاص للتأثيرات متعددة المخاطر. ومع ذلك، فإن التحديات التي ووجهت في تطوير أنظمة إيبف الجفاف – بما في ذلك سوء فهم الآثار المركبة والتفويضات المحددة التي تركز على المخاطر – تثير أسئلة مهمة حول جدوى إيبف متعددة المخاطر على النحو المتوخى من قبل المنظمة العالمية للأرصاد الجوية. مع وضع هذه التحديات في الاعتبار، نقترح نهجًا مؤقتًا يوفر فيه التقييم في الوقت الفعلي للضعف الديناميكي سياقًا لـ IbF القائم على الجفاف. إن دمج مؤشرات الضعف الديناميكية يفسر الآثار المحلية لمخاطر غير الجفاف، في حين أن استخدام نظام قائم على الجفاف يسهل التدخل الفعال. سيحسن النهج المقترح فهمنا للأحداث المركبة، ويعزز اعتماد IbF في القطاع الإنساني، ويخفف بشكل أفضل من آثار المخاطر المتزامنة.

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