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Earlier-Season Vegetation Has Greater Temperature Sensitivity of Spring Phenology in Northern Hemisphere

يحتوي الغطاء النباتي في الموسم السابق على حساسية أكبر لدرجة الحرارة لظاهرة الربيع في نصف الكرة الشمالي
Authors: Miaogen Shen; Yanhong Tang; Jin Chen; Xi Yang; Cong Wang; Xiaoyong Cui; Yongping Yang; +5 Authors

Earlier-Season Vegetation Has Greater Temperature Sensitivity of Spring Phenology in Northern Hemisphere

Abstract

Au cours des dernières décennies, le début de la saison de croissance de la végétation (SOS) dérivé des satellites a progressé dans de nombreuses régions tempérées et boréales du Nord. L'ampleur de l'augmentation de la température et la sensibilité de la phénologie de la verdure à la température - le changement phénologique par unité de température - peuvent contribuer à l'avancement. Pour déterminer la sensibilité à la température, nous avons examiné le SOS dérivé du satellite et la température de pré-saison potentiellement efficace (Teff) de 1982 à 2008 pour les terres végétalisées entre 30°N et 80°N. Les types de végétation de saison antérieure, c'est-à-dire les types de végétation avec SOSmoyen antérieur (SOS moyen pour 1982–2008), ont montré une plus grande progression de SOS au cours de 1982–2008. Le taux d'avancement de SOS par rapport à l'année était également plus élevé dans la végétation avec SOS moyen plus tôt, même l'augmentation de Teff était la même. Ces résultats suggèrent que la phénologie printanière de la végétation peut avoir une sensibilité élevée à la température dans une zone plus chaude. Par conséquent, il est important de tenir compte de la sensibilité à la température dans l'évaluation des réponses phénologiques à grande échelle au réchauffement climatique. D'autres études sont nécessaires pour explorer les mécanismes et les conséquences écologiques de la sensibilité à la température du début de la saison de croissance dans un climat qui se réchauffe.

En las últimas décadas, el inicio de la temporada de crecimiento de la vegetación (SOS) derivado de satélites ha avanzado en muchas regiones templadas y boreales del norte. Tanto la magnitud del aumento de la temperatura como la sensibilidad de la fenología del verdor a la temperatura, el cambio fenológico por unidad de temperatura, pueden contribuir al avance. Para determinar la sensibilidad a la temperatura, examinamos el SOS derivado del satélite y la temperatura de pretemporada potencialmente efectiva (Teff) de 1982 a 2008 para tierras con vegetación entre 30°N y 80°N. Los tipos de vegetación de temporada anterior, es decir, los tipos de vegetación con media SOS anterior (media SOS para 1982–2008), mostraron un mayor avance de SOS durante 1982–2008. La tasa de avance de SOS frente al año también fue mayor en la vegetación con SOS anterior, lo que significa que incluso el aumento de Teff fue el mismo. Estos resultados sugieren que la fenología primaveral de la vegetación puede tener una alta sensibilidad a la temperatura en un área más cálida. Por lo tanto, es importante considerar la sensibilidad a la temperatura al evaluar las respuestas fenológicas a gran escala al calentamiento climático. Se necesitan más estudios para explorar los mecanismos y las consecuencias ecológicas de la sensibilidad a la temperatura del inicio de la temporada de crecimiento en un clima más cálido.

In recent decades, satellite-derived start of vegetation growing season (SOS) has advanced in many northern temperate and boreal regions. Both the magnitude of temperature increase and the sensitivity of the greenness phenology to temperature–the phenological change per unit temperature–can contribute the advancement. To determine the temperature-sensitivity, we examined the satellite-derived SOS and the potentially effective pre-season temperature (Teff) from 1982 to 2008 for vegetated land between 30°N and 80°N. Earlier season vegetation types, i.e., the vegetation types with earlier SOSmean (mean SOS for 1982–2008), showed greater advancement of SOS during 1982–2008. The advancing rate of SOS against year was also greater in the vegetation with earlier SOSmean even the Teff increase was the same. These results suggest that the spring phenology of vegetation may have high temperature sensitivity in a warmer area. Therefore it is important to consider temperature-sensitivity in assessing broad-scale phenological responses to climatic warming. Further studies are needed to explore the mechanisms and ecological consequences of the temperature-sensitivity of start of growing season in a warming climate.

في العقود الأخيرة، تقدمت بداية موسم زراعة النباتات المستمدة من الأقمار الصناعية في العديد من المناطق الشمالية المعتدلة والشمالية. يمكن أن يساهم كل من حجم زيادة درجة الحرارة وحساسية فينولوجيا الخضرة لدرجة الحرارة - التغير الفينولوجي لكل وحدة درجة حرارة - في التقدم. لتحديد حساسية درجة الحرارة، قمنا بفحص حالة الطوارئ المشتقة من الأقمار الصناعية ودرجة حرارة ما قبل الموسم الفعالة المحتملة (TEFF) من عام 1982 إلى عام 2008 للأراضي النباتية بين 30درجةشمالاً و 80درجةشمالاً. أظهرت أنواع الغطاء النباتي للموسم السابق، أي أنواع الغطاء النباتي مع SOSmean السابقة (متوسط SOS للفترة 1982–2008)، تقدمًا أكبر في SOS خلال الفترة 1982–2008. كان معدل تقدم حالة الطوارئ مقابل العام أكبر أيضًا في الغطاء النباتي مع حالة الطوارئ السابقة يعني حتى زيادة التيف كانت هي نفسها. تشير هذه النتائج إلى أن فينولوجيا الربيع للغطاء النباتي قد يكون لها حساسية عالية لدرجة الحرارة في منطقة أكثر دفئًا. لذلك من المهم مراعاة الحساسية لدرجات الحرارة عند تقييم الاستجابات الفينولوجية واسعة النطاق للاحترار المناخي. هناك حاجة إلى مزيد من الدراسات لاستكشاف الآليات والعواقب البيئية لحساسية درجة الحرارة لبدء موسم النمو في مناخ دافئ.

Related Organizations
Keywords

Atmospheric sciences, Climate, Global Warming, Pathology, Climate change, Northern Hemisphere, Climatology, Global and Planetary Change, Vegetation Monitoring, Species Distribution Modeling and Climate Change Impacts, Ecology, Geography, Ecological Modeling, Global warming, Q, R, Temperature, Geology, Remote Sensing in Vegetation Monitoring and Phenology, Grassland, Phenology, Physical Sciences, Medicine, Seasons, Global Vegetation Models, Vegetation (pathology), Research Article, Physical geography, Science, Plant Development, Vegetation type, Environmental science, Boreal, Biology, Ecosystem, Global Forest Drought Response and Climate Change, FOS: Earth and related environmental sciences, Temperate climate, FOS: Biological sciences, Environmental Science, Growing season

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    Impact byBIP!
    citations
    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    103
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Top 1%
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Top 10%
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
103
Top 1%
Top 10%
Top 1%
Green
gold