Changes in Arctic vegetation amplify high-latitude warming through the greenhouse effect
Arctic climate is projected to change dramatically in the next 100 years and increases in temperature will likely lead to changes in the distribution and makeup of the Arctic biosphere. A largely deciduous ecosystem has been suggested as a possible landscape for future Arctic vegetation and is seen...
Published in: | Proceedings of the National Academy of Sciences |
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Online Access: | http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-000-140 https://doi.org/10.1073/pnas.0913846107 |
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ftncar:oai:drupal-site.org:articles_17058 2023-09-05T13:11:22+02:00 Changes in Arctic vegetation amplify high-latitude warming through the greenhouse effect Swann, Abigail (author) Fung, Inez (author) Levis, Samuel (author) Bonan, Gordon (author) Doney, Scott (author) 2010-01-26 http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-000-140 https://doi.org/10.1073/pnas.0913846107 en eng Proceedings of the National Academy of Sciences of the United States of America http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-000-140 doi:10.1073/pnas.0913846107 ark:/85065/d7fb546v An edited version of this paper was published by the National Academy of Sciences. Copyright 2010 the National Academy of Sciences. biosphere-atmosphere interaction climate feedback radiative forcing sea-ice deciduous Text article 2010 ftncar https://doi.org/10.1073/pnas.0913846107 2023-08-14T18:42:28Z Arctic climate is projected to change dramatically in the next 100 years and increases in temperature will likely lead to changes in the distribution and makeup of the Arctic biosphere. A largely deciduous ecosystem has been suggested as a possible landscape for future Arctic vegetation and is seen in paleo-records of warm times in the past. Here we use a global climate model with an interactive terrestrial biosphere to investigate the effects of adding deciduous trees on bare ground at high northern latitudes. We find that the top-of-atmosphere radiative imbalance from enhanced transpiration (associated with the expanded forest cover) is up to 1.5 times larger than the forcing due to albedo change from the forest. Furthermore, the greenhouse warming by additional water vapor melts sea-ice and triggers a positive feedback through changes in ocean albedo and evaporation. Land surface albedo change is considered to be the dominant mechanism by which trees directly modify climate at high-latitudes, but our findings suggest an additional mechanism through transpiration of water vapor and feedbacks from the ocean and sea-ice. National Science Foundation (NSF): ATM-0628678 National Science Foundation (NSF): ATM-0628582 Article in Journal/Newspaper albedo Arctic Sea ice OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Arctic Proceedings of the National Academy of Sciences 107 4 1295 1300 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
topic |
biosphere-atmosphere interaction climate feedback radiative forcing sea-ice deciduous |
spellingShingle |
biosphere-atmosphere interaction climate feedback radiative forcing sea-ice deciduous Changes in Arctic vegetation amplify high-latitude warming through the greenhouse effect |
topic_facet |
biosphere-atmosphere interaction climate feedback radiative forcing sea-ice deciduous |
description |
Arctic climate is projected to change dramatically in the next 100 years and increases in temperature will likely lead to changes in the distribution and makeup of the Arctic biosphere. A largely deciduous ecosystem has been suggested as a possible landscape for future Arctic vegetation and is seen in paleo-records of warm times in the past. Here we use a global climate model with an interactive terrestrial biosphere to investigate the effects of adding deciduous trees on bare ground at high northern latitudes. We find that the top-of-atmosphere radiative imbalance from enhanced transpiration (associated with the expanded forest cover) is up to 1.5 times larger than the forcing due to albedo change from the forest. Furthermore, the greenhouse warming by additional water vapor melts sea-ice and triggers a positive feedback through changes in ocean albedo and evaporation. Land surface albedo change is considered to be the dominant mechanism by which trees directly modify climate at high-latitudes, but our findings suggest an additional mechanism through transpiration of water vapor and feedbacks from the ocean and sea-ice. National Science Foundation (NSF): ATM-0628678 National Science Foundation (NSF): ATM-0628582 |
author2 |
Swann, Abigail (author) Fung, Inez (author) Levis, Samuel (author) Bonan, Gordon (author) Doney, Scott (author) |
format |
Article in Journal/Newspaper |
title |
Changes in Arctic vegetation amplify high-latitude warming through the greenhouse effect |
title_short |
Changes in Arctic vegetation amplify high-latitude warming through the greenhouse effect |
title_full |
Changes in Arctic vegetation amplify high-latitude warming through the greenhouse effect |
title_fullStr |
Changes in Arctic vegetation amplify high-latitude warming through the greenhouse effect |
title_full_unstemmed |
Changes in Arctic vegetation amplify high-latitude warming through the greenhouse effect |
title_sort |
changes in arctic vegetation amplify high-latitude warming through the greenhouse effect |
publishDate |
2010 |
url |
http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-000-140 https://doi.org/10.1073/pnas.0913846107 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
albedo Arctic Sea ice |
genre_facet |
albedo Arctic Sea ice |
op_relation |
Proceedings of the National Academy of Sciences of the United States of America http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-000-140 doi:10.1073/pnas.0913846107 ark:/85065/d7fb546v |
op_rights |
An edited version of this paper was published by the National Academy of Sciences. Copyright 2010 the National Academy of Sciences. |
op_doi |
https://doi.org/10.1073/pnas.0913846107 |
container_title |
Proceedings of the National Academy of Sciences |
container_volume |
107 |
container_issue |
4 |
container_start_page |
1295 |
op_container_end_page |
1300 |
_version_ |
1776204715326963712 |