Permafrost response to vegetation greenness variation in the Arctic tundra through positive feedback in surface air temperature and snow cover
The permafrost response to variations in Arctic vegetation remains controversial. We investigated the consequences of Arctic vegetation greenness variation over the past three decades using a coupled land-atmosphere model and found that it induces air temperature perturbation, which is further ampli...
Published in: | Environmental Research Letters |
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Online Access: | http://www.osti.gov/servlets/purl/1545234 https://www.osti.gov/biblio/1545234 https://doi.org/10.1088/1748-9326/ab0839 |
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ftosti:oai:osti.gov:1545234 2023-07-30T04:00:23+02:00 Permafrost response to vegetation greenness variation in the Arctic tundra through positive feedback in surface air temperature and snow cover Wang, Zhan Kim, Yeonjoo Seo, Hochoel Um, Myoung -Jin Mao, Jiafu 2022-01-03 application/pdf http://www.osti.gov/servlets/purl/1545234 https://www.osti.gov/biblio/1545234 https://doi.org/10.1088/1748-9326/ab0839 unknown http://www.osti.gov/servlets/purl/1545234 https://www.osti.gov/biblio/1545234 https://doi.org/10.1088/1748-9326/ab0839 doi:10.1088/1748-9326/ab0839 54 ENVIRONMENTAL SCIENCES 2022 ftosti https://doi.org/10.1088/1748-9326/ab0839 2023-07-11T09:35:20Z The permafrost response to variations in Arctic vegetation remains controversial. We investigated the consequences of Arctic vegetation greenness variation over the past three decades using a coupled land-atmosphere model and found that it induces air temperature perturbation, which is further amplified by snow cover variation and eventually leaves a footprint on soil temperature. Compared to the atmospheric impacts of vegetation, local shading of vegetation canopy has relatively minor effects on soil temperature. Significant soil warming was observed along the summer snowline between the Low and High Arctic, indicating the direct impact of snow cover variation led by vegetation changes. In the Low Arctic, the winter snowpack insulates the soil from colder air, resulting in less permafrost. In the High Arctic, snow persists for more than 330 d per year and has a strong protection effect on the permafrost as it insulates soil from warmer summer air and reflects solar radiation. Other/Unknown Material Arctic permafrost Tundra SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Arctic Environmental Research Letters 14 4 044024 |
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Open Polar |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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language |
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54 ENVIRONMENTAL SCIENCES |
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54 ENVIRONMENTAL SCIENCES Wang, Zhan Kim, Yeonjoo Seo, Hochoel Um, Myoung -Jin Mao, Jiafu Permafrost response to vegetation greenness variation in the Arctic tundra through positive feedback in surface air temperature and snow cover |
topic_facet |
54 ENVIRONMENTAL SCIENCES |
description |
The permafrost response to variations in Arctic vegetation remains controversial. We investigated the consequences of Arctic vegetation greenness variation over the past three decades using a coupled land-atmosphere model and found that it induces air temperature perturbation, which is further amplified by snow cover variation and eventually leaves a footprint on soil temperature. Compared to the atmospheric impacts of vegetation, local shading of vegetation canopy has relatively minor effects on soil temperature. Significant soil warming was observed along the summer snowline between the Low and High Arctic, indicating the direct impact of snow cover variation led by vegetation changes. In the Low Arctic, the winter snowpack insulates the soil from colder air, resulting in less permafrost. In the High Arctic, snow persists for more than 330 d per year and has a strong protection effect on the permafrost as it insulates soil from warmer summer air and reflects solar radiation. |
author |
Wang, Zhan Kim, Yeonjoo Seo, Hochoel Um, Myoung -Jin Mao, Jiafu |
author_facet |
Wang, Zhan Kim, Yeonjoo Seo, Hochoel Um, Myoung -Jin Mao, Jiafu |
author_sort |
Wang, Zhan |
title |
Permafrost response to vegetation greenness variation in the Arctic tundra through positive feedback in surface air temperature and snow cover |
title_short |
Permafrost response to vegetation greenness variation in the Arctic tundra through positive feedback in surface air temperature and snow cover |
title_full |
Permafrost response to vegetation greenness variation in the Arctic tundra through positive feedback in surface air temperature and snow cover |
title_fullStr |
Permafrost response to vegetation greenness variation in the Arctic tundra through positive feedback in surface air temperature and snow cover |
title_full_unstemmed |
Permafrost response to vegetation greenness variation in the Arctic tundra through positive feedback in surface air temperature and snow cover |
title_sort |
permafrost response to vegetation greenness variation in the arctic tundra through positive feedback in surface air temperature and snow cover |
publishDate |
2022 |
url |
http://www.osti.gov/servlets/purl/1545234 https://www.osti.gov/biblio/1545234 https://doi.org/10.1088/1748-9326/ab0839 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic permafrost Tundra |
genre_facet |
Arctic permafrost Tundra |
op_relation |
http://www.osti.gov/servlets/purl/1545234 https://www.osti.gov/biblio/1545234 https://doi.org/10.1088/1748-9326/ab0839 doi:10.1088/1748-9326/ab0839 |
op_doi |
https://doi.org/10.1088/1748-9326/ab0839 |
container_title |
Environmental Research Letters |
container_volume |
14 |
container_issue |
4 |
container_start_page |
044024 |
_version_ |
1772810881776746496 |