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description Publicationkeyboard_double_arrow_right Article , Journal 2019 FinlandPublisher:Elsevier BV Authors: Achim Bräuning; A.K. Franke;Matthias Braun;
Matthias Braun
Matthias Braun in OpenAIREHannes Feilhauer;
+2 AuthorsHannes Feilhauer
Hannes Feilhauer in OpenAIREAchim Bräuning; A.K. Franke;Matthias Braun;
Matthias Braun
Matthias Braun in OpenAIREHannes Feilhauer;
Hannes Feilhauer; Pasi Rautio;Hannes Feilhauer
Hannes Feilhauer in OpenAIREAbstract Global warming is predicted to affect ecosystems, particularly in high-latitude regions where polar amplification accelerates temperature rise and environmental changes. Here, where plants grow under adverse conditions, a warmer climate provides more favourable conditions for growth and regeneration. At the alpine and polar tree line in Finnish Lapland, rising temperatures are assumed to promote densification and expansion of conifers towards fell tops and treeless boreal heathlands beyond the recent tree-line position. In this study, we analysed vegetation changes in the pine treeline ecotone in six study sites in Finnish Lapland using multi-spectral satellite data during 1984–2017. All of the six sites were established in fell areas, covering the transition from closed forest stands of the lower elevations to the open fell tops beyond the treeline position. The southern sites were located in pine dominated-stands, where treelines were of alpine character. The northern sites were located in the polar treeline ecotone where mountain birch forests already dominate the landscape. We assessed shifts in the vegetation pattern of the fell sites using the normalized difference vegetation index (NDVI) and a RandomForest land-cover classification as indicators of potential change. We did not find clear trends for advancing coniferous tree lines towards open fell tops or treeless heath vegetation, neither by NDVI change detection nor by the land-cover classification. However, we found evidence for densification of open forest stands and sparse vegetation cover in lower elevations and the expansion of deciduous vegetation in higher elevations of previously vegetation-free or sparsely covered fell tops. Increasing stand density was detected mostly in the southern, pine-dominated sites, while the northern sites indicated increasing biomass near the fell tops. Prominent changes in vegetation patterns originated rather from human impact in the southern sites appearing as recent roads, clear-cuttings or infrastructure constructions in skiing areas. In the northern sites, distinctive changes arose from human impact or from biotic disturbance events such as moth outbreaks defoliating mountain birch stands at site Karigasniemi.
Forest Ecology and M... arrow_drop_down Forest Ecology and ManagementArticle . 2019 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.foreco.2019.117668&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu19 citations 19 popularity Top 10% influence Average impulse Top 10% Powered by BIP!
more_vert Forest Ecology and M... arrow_drop_down Forest Ecology and ManagementArticle . 2019 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.foreco.2019.117668&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2023Embargo end date: 16 Jul 2024 Germany, France, SwitzerlandPublisher:Copernicus GmbH Funded by:RCN | MASSIVE - MAchine learnin..., DFG, RCN | SNOWDEPTH - Global snow d... +1 projectsRCN| MASSIVE - MAchine learning, Surface mass balance of glaciers, Snow cover, In-situ data, Volume change, Earth observation ,DFG ,RCN| SNOWDEPTH - Global snow depths from spaceborne remote sensing for permafrost, high-elevation precipitation, and climate reanalyses ,SNSF| Process-based modelling of global glacier changes (PROGGRES)Authors:L. Piermattei;
L. Piermattei; L. Piermattei;L. Piermattei
L. Piermattei in OpenAIREM. Zemp;
+39 AuthorsL. Piermattei;
L. Piermattei; L. Piermattei;L. Piermattei
L. Piermattei in OpenAIREM. Zemp;
C. Sommer;
F. Brun;C. Sommer
C. Sommer in OpenAIREM. H. Braun;
M. H. Braun
M. H. Braun in OpenAIREL. M. Andreassen;
J. M. C. Belart;L. M. Andreassen
L. M. Andreassen in OpenAIREE. Berthier;
E. Berthier
E. Berthier in OpenAIREA. Bhattacharya;
A. Bhattacharya
A. Bhattacharya in OpenAIREL. Boehm Vock;
L. Boehm Vock
L. Boehm Vock in OpenAIRET. Bolch;
T. Bolch; A. Dehecq; I. Dussaillant; D. Falaschi; D. Falaschi; C. Florentine; D. Floricioiu; C. Ginzler; G. Guillet; R. Hugonnet; R. Hugonnet; R. Hugonnet; M. Huss; M. Huss; M. Huss; A. Kääb; O. King;T. Bolch
T. Bolch in OpenAIREC. Klug;
F. Knuth;L. Krieger;
J. La Frenierre;L. Krieger
L. Krieger in OpenAIRER. McNabb;
C. McNeil; R. Prinz; L. Sass; T. Seehaus;R. McNabb
R. McNabb in OpenAIRED. Shean;
D. Treichler; A. Wendt;D. Shean
D. Shean in OpenAIRER. Yang;
Abstract. Observations of glacier mass changes are key to understanding the response of glaciers to climate change and related impacts, such as regional runoff, ecosystem changes, and global sea level rise. Spaceborne optical and radar sensors make it possible to quantify glacier elevation changes, and thus multi-annual mass changes, on a regional and global scale. However, estimates from a growing number of studies show a wide range of results with differences often beyond uncertainty bounds. Here, we present the outcome of a community-based inter-comparison experiment using spaceborne optical stereo (ASTER) and synthetic aperture radar interferometry (TanDEM-X) data to estimate elevation changes for defined glaciers and target periods that pose different assessment challenges. Using provided or self-processed digital elevation models (DEMs) for five test sites, 12 research groups provided a total of 97 spaceborne elevation-change datasets using various processing approaches. Validation with airborne data showed that using an ensemble estimate is promising to reduce random errors from different instruments and processing methods but still requires a more comprehensive investigation and correction of systematic errors. We found that scene selection, DEM processing, and co-registration have the biggest impact on the results. Other processing steps, such as treating spatial data voids, differences in survey periods, or radar penetration, can still be important for individual cases. Future research should focus on testing different implementations of individual processing steps (e.g. co-registration) and addressing issues related to temporal corrections, radar penetration, glacier area changes, and density conversion. Finally, there is a clear need for our community to develop best practices, use open, reproducible software, and assess overall uncertainty to enhance inter-comparison and empower physical process insights across glacier elevation-change studies.
The Cryosphere arrow_drop_down https://doi.org/10.5194/egusph...Article . 2023 . Peer-reviewedLicense: CC BYData sources: CrossrefFachrepositorium LebenswissenschaftenArticle . 2024License: CC BYData sources: Fachrepositorium LebenswissenschaftenInstitut National de la Recherche Agronomique: ProdINRAArticle . 2024Data sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5194/tc-18-3195-2024&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen gold 4 citations 4 popularity Top 10% influence Average impulse Average Powered by BIP!
more_vert The Cryosphere arrow_drop_down https://doi.org/10.5194/egusph...Article . 2023 . Peer-reviewedLicense: CC BYData sources: CrossrefFachrepositorium LebenswissenschaftenArticle . 2024License: CC BYData sources: Fachrepositorium LebenswissenschaftenInstitut National de la Recherche Agronomique: ProdINRAArticle . 2024Data sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5194/tc-18-3195-2024&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu