Surface water, vegetation, and fire as drivers of the terrestrial Arctic-boreal albedo feedback
Abstract The Arctic is warming twice as fast as the global average, due in part to the albedo feedbacks of a diminishing cryosphere. As snow cover extent decreases, the underlying land is exposed, which has lower albedo and therefore absorbs more radiation, warming the surface and causing a positive...
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crioppubl:10.1088/1748-9326/ac14ea 2024-09-15T17:35:45+00:00 Surface water, vegetation, and fire as drivers of the terrestrial Arctic-boreal albedo feedback Webb, E E Loranty, M M Lichstein, J W National Aeronautics and Space Administration Office of Polar Programs 2021 http://dx.doi.org/10.1088/1748-9326/ac14ea https://iopscience.iop.org/article/10.1088/1748-9326/ac14ea https://iopscience.iop.org/article/10.1088/1748-9326/ac14ea/pdf unknown IOP Publishing http://creativecommons.org/licenses/by/4.0 https://iopscience.iop.org/info/page/text-and-data-mining Environmental Research Letters volume 16, issue 8, page 084046 ISSN 1748-9326 journal-article 2021 crioppubl https://doi.org/10.1088/1748-9326/ac14ea 2024-08-12T04:13:54Z Abstract The Arctic is warming twice as fast as the global average, due in part to the albedo feedbacks of a diminishing cryosphere. As snow cover extent decreases, the underlying land is exposed, which has lower albedo and therefore absorbs more radiation, warming the surface and causing a positive feedback to climate change. Changes in terrestrial snow-free albedo (e.g. changes in vegetation or surface water) could also affect Earth’s energy balance, but their importance for contemporary climate change is relatively unknown. Here we show that changes in surface water are significantly altering Artic-boreal albedo, and explain up to 27% of the spatial variation in monthly albedo change from 2000 to 2019. The increase in radiative forcing due to changes in surface water extent is most pronounced in the continuous permafrost zone, contributing to a positive feedback between permafrost thaw and climate change. Additionally, we show that fire history and changes in tree cover and surface water extent together account for at least 15% of albedo-induced radiative forcing over the study period, indicating that these processes are a regionally important aspect of the climate-albedo feedback. Article in Journal/Newspaper albedo Climate change permafrost IOP Publishing Environmental Research Letters 16 8 084046 |
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Abstract The Arctic is warming twice as fast as the global average, due in part to the albedo feedbacks of a diminishing cryosphere. As snow cover extent decreases, the underlying land is exposed, which has lower albedo and therefore absorbs more radiation, warming the surface and causing a positive feedback to climate change. Changes in terrestrial snow-free albedo (e.g. changes in vegetation or surface water) could also affect Earth’s energy balance, but their importance for contemporary climate change is relatively unknown. Here we show that changes in surface water are significantly altering Artic-boreal albedo, and explain up to 27% of the spatial variation in monthly albedo change from 2000 to 2019. The increase in radiative forcing due to changes in surface water extent is most pronounced in the continuous permafrost zone, contributing to a positive feedback between permafrost thaw and climate change. Additionally, we show that fire history and changes in tree cover and surface water extent together account for at least 15% of albedo-induced radiative forcing over the study period, indicating that these processes are a regionally important aspect of the climate-albedo feedback. |
author2 |
National Aeronautics and Space Administration Office of Polar Programs |
format |
Article in Journal/Newspaper |
author |
Webb, E E Loranty, M M Lichstein, J W |
spellingShingle |
Webb, E E Loranty, M M Lichstein, J W Surface water, vegetation, and fire as drivers of the terrestrial Arctic-boreal albedo feedback |
author_facet |
Webb, E E Loranty, M M Lichstein, J W |
author_sort |
Webb, E E |
title |
Surface water, vegetation, and fire as drivers of the terrestrial Arctic-boreal albedo feedback |
title_short |
Surface water, vegetation, and fire as drivers of the terrestrial Arctic-boreal albedo feedback |
title_full |
Surface water, vegetation, and fire as drivers of the terrestrial Arctic-boreal albedo feedback |
title_fullStr |
Surface water, vegetation, and fire as drivers of the terrestrial Arctic-boreal albedo feedback |
title_full_unstemmed |
Surface water, vegetation, and fire as drivers of the terrestrial Arctic-boreal albedo feedback |
title_sort |
surface water, vegetation, and fire as drivers of the terrestrial arctic-boreal albedo feedback |
publisher |
IOP Publishing |
publishDate |
2021 |
url |
http://dx.doi.org/10.1088/1748-9326/ac14ea https://iopscience.iop.org/article/10.1088/1748-9326/ac14ea https://iopscience.iop.org/article/10.1088/1748-9326/ac14ea/pdf |
genre |
albedo Climate change permafrost |
genre_facet |
albedo Climate change permafrost |
op_source |
Environmental Research Letters volume 16, issue 8, page 084046 ISSN 1748-9326 |
op_rights |
http://creativecommons.org/licenses/by/4.0 https://iopscience.iop.org/info/page/text-and-data-mining |
op_doi |
https://doi.org/10.1088/1748-9326/ac14ea |
container_title |
Environmental Research Letters |
container_volume |
16 |
container_issue |
8 |
container_start_page |
084046 |
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1810476592838737920 |