Local radiative feedbacks over the Arctic based on observed short-term climate variations
We compare various radiative feedbacks over the Arctic (60-90 degrees N) estimated from short-term climate variations occurring in reanalysis, satellite, and global climate model data sets using the combined Kernel-Gregory approach. The lapse rate and surface albedo feedbacks are positive, and their...
Published in: | Geophysical Research Letters |
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Language: | English |
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2018
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Online Access: | https://doi.org/10.1029/2018GL077852 |
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ftncar:oai:drupal-site.org:articles_21766 2023-09-05T13:11:22+02:00 Local radiative feedbacks over the Arctic based on observed short-term climate variations Zhang, Rudong (author) Wang, Hailong (author) Fu, Qiang (author) Pendergrass, Angeline G. (author) Wang, Minghuai (author) Yang, Yang (author) Ma, Po-Lun (author) Rasch, Philip J. (author) 2018-06-16 https://doi.org/10.1029/2018GL077852 en eng Geophysical Research Letters--Geophys. Res. Lett.--00948276 articles:21766 ark:/85065/d7db84pz doi:10.1029/2018GL077852 Copyright 2018 American Geophysical Union. article Text 2018 ftncar https://doi.org/10.1029/2018GL077852 2023-08-14T18:49:17Z We compare various radiative feedbacks over the Arctic (60-90 degrees N) estimated from short-term climate variations occurring in reanalysis, satellite, and global climate model data sets using the combined Kernel-Gregory approach. The lapse rate and surface albedo feedbacks are positive, and their magnitudes are comparable. Relative to the tropics (30 degrees S-30 degrees N), the lapse rate feedback is the largest contributor to Arctic amplification among all feedbacks, followed by surface albedo feedback and Planck feedback deviation from its global mean. Both shortwave and longwave water vapor feedbacks are positive, leading to a significant positive net water vapor feedback over the Arctic. The net cloud feedback has large uncertainties including its sign, which strongly depends on the data used for all-sky and clear-sky radiative fluxes at the top of the atmosphere, the time periods considered, and the methods used to estimate the cloud feedback. Article in Journal/Newspaper albedo Arctic OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Arctic Geophysical Research Letters 45 11 5761 5770 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
We compare various radiative feedbacks over the Arctic (60-90 degrees N) estimated from short-term climate variations occurring in reanalysis, satellite, and global climate model data sets using the combined Kernel-Gregory approach. The lapse rate and surface albedo feedbacks are positive, and their magnitudes are comparable. Relative to the tropics (30 degrees S-30 degrees N), the lapse rate feedback is the largest contributor to Arctic amplification among all feedbacks, followed by surface albedo feedback and Planck feedback deviation from its global mean. Both shortwave and longwave water vapor feedbacks are positive, leading to a significant positive net water vapor feedback over the Arctic. The net cloud feedback has large uncertainties including its sign, which strongly depends on the data used for all-sky and clear-sky radiative fluxes at the top of the atmosphere, the time periods considered, and the methods used to estimate the cloud feedback. |
author2 |
Zhang, Rudong (author) Wang, Hailong (author) Fu, Qiang (author) Pendergrass, Angeline G. (author) Wang, Minghuai (author) Yang, Yang (author) Ma, Po-Lun (author) Rasch, Philip J. (author) |
format |
Article in Journal/Newspaper |
title |
Local radiative feedbacks over the Arctic based on observed short-term climate variations |
spellingShingle |
Local radiative feedbacks over the Arctic based on observed short-term climate variations |
title_short |
Local radiative feedbacks over the Arctic based on observed short-term climate variations |
title_full |
Local radiative feedbacks over the Arctic based on observed short-term climate variations |
title_fullStr |
Local radiative feedbacks over the Arctic based on observed short-term climate variations |
title_full_unstemmed |
Local radiative feedbacks over the Arctic based on observed short-term climate variations |
title_sort |
local radiative feedbacks over the arctic based on observed short-term climate variations |
publishDate |
2018 |
url |
https://doi.org/10.1029/2018GL077852 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
albedo Arctic |
genre_facet |
albedo Arctic |
op_relation |
Geophysical Research Letters--Geophys. Res. Lett.--00948276 articles:21766 ark:/85065/d7db84pz doi:10.1029/2018GL077852 |
op_rights |
Copyright 2018 American Geophysical Union. |
op_doi |
https://doi.org/10.1029/2018GL077852 |
container_title |
Geophysical Research Letters |
container_volume |
45 |
container_issue |
11 |
container_start_page |
5761 |
op_container_end_page |
5770 |
_version_ |
1776204720226959360 |