The implications of maintaining Earth's hemispheric albedo symmetry for shortwave radiative feedbacks
The Earth's albedo is observed to be symmetric between the hemispheres on the annual mean timescale, despite the clear-sky albedo being asymmetrically higher in the Northern Hemisphere due to more land area and aerosol sources; this is because the mean cloud distribution currently compensates f...
Published in: | Earth System Dynamics |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2023
|
Subjects: | |
Online Access: | https://doi.org/10.5194/esd-14-345-2023 https://noa.gwlb.de/receive/cop_mods_00065519 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00064039/esd-14-345-2023.pdf https://esd.copernicus.org/articles/14/345/2023/esd-14-345-2023.pdf |
id |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00065519 |
---|---|
record_format |
openpolar |
spelling |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00065519 2023-05-15T13:10:38+02:00 The implications of maintaining Earth's hemispheric albedo symmetry for shortwave radiative feedbacks Jönsson, Aiden R. Bender, Frida A.-M. 2023-03 electronic https://doi.org/10.5194/esd-14-345-2023 https://noa.gwlb.de/receive/cop_mods_00065519 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00064039/esd-14-345-2023.pdf https://esd.copernicus.org/articles/14/345/2023/esd-14-345-2023.pdf eng eng Copernicus Publications Earth System Dynamics -- http://www.earth-syst-dynam.net/ -- http://www.bibliothek.uni-regensburg.de/ezeit/?2578793 -- 2190-4987 https://doi.org/10.5194/esd-14-345-2023 https://noa.gwlb.de/receive/cop_mods_00065519 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00064039/esd-14-345-2023.pdf https://esd.copernicus.org/articles/14/345/2023/esd-14-345-2023.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2023 ftnonlinearchiv https://doi.org/10.5194/esd-14-345-2023 2023-03-26T23:15:38Z The Earth's albedo is observed to be symmetric between the hemispheres on the annual mean timescale, despite the clear-sky albedo being asymmetrically higher in the Northern Hemisphere due to more land area and aerosol sources; this is because the mean cloud distribution currently compensates for the clear-sky asymmetry almost exactly. We investigate the evolution of the hemispheric difference in albedo in the Coupled Model Intercomparison Project Phase 6 (CMIP6) coupled model simulations following an abrupt quadrupling of CO2 concentrations, to which all models respond with an initial decrease of albedo in the Northern Hemisphere (NH) due to loss of Arctic sea ice. Models disagree over whether the net effect of NH cloud responses is to reduce or amplify initial NH albedo reductions. After the initial response, the evolution of the hemispheric albedo difference diverges among models, with some models remaining stably at their new hemispheric albedo difference and others returning towards their pre-industrial difference primarily through a reduction in SH cloud cover. Whereas local increases in cloud cover contribute to negative shortwave cloud feedback, the cross-hemispheric communicating mechanism found to be primarily responsible for restoring hemispheric symmetry in the models studied implies positive shortwave cloud feedback. Article in Journal/Newspaper albedo Arctic Sea ice Niedersächsisches Online-Archiv NOA Arctic Earth System Dynamics 14 2 345 365 |
institution |
Open Polar |
collection |
Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Jönsson, Aiden R. Bender, Frida A.-M. The implications of maintaining Earth's hemispheric albedo symmetry for shortwave radiative feedbacks |
topic_facet |
article Verlagsveröffentlichung |
description |
The Earth's albedo is observed to be symmetric between the hemispheres on the annual mean timescale, despite the clear-sky albedo being asymmetrically higher in the Northern Hemisphere due to more land area and aerosol sources; this is because the mean cloud distribution currently compensates for the clear-sky asymmetry almost exactly. We investigate the evolution of the hemispheric difference in albedo in the Coupled Model Intercomparison Project Phase 6 (CMIP6) coupled model simulations following an abrupt quadrupling of CO2 concentrations, to which all models respond with an initial decrease of albedo in the Northern Hemisphere (NH) due to loss of Arctic sea ice. Models disagree over whether the net effect of NH cloud responses is to reduce or amplify initial NH albedo reductions. After the initial response, the evolution of the hemispheric albedo difference diverges among models, with some models remaining stably at their new hemispheric albedo difference and others returning towards their pre-industrial difference primarily through a reduction in SH cloud cover. Whereas local increases in cloud cover contribute to negative shortwave cloud feedback, the cross-hemispheric communicating mechanism found to be primarily responsible for restoring hemispheric symmetry in the models studied implies positive shortwave cloud feedback. |
format |
Article in Journal/Newspaper |
author |
Jönsson, Aiden R. Bender, Frida A.-M. |
author_facet |
Jönsson, Aiden R. Bender, Frida A.-M. |
author_sort |
Jönsson, Aiden R. |
title |
The implications of maintaining Earth's hemispheric albedo symmetry for shortwave radiative feedbacks |
title_short |
The implications of maintaining Earth's hemispheric albedo symmetry for shortwave radiative feedbacks |
title_full |
The implications of maintaining Earth's hemispheric albedo symmetry for shortwave radiative feedbacks |
title_fullStr |
The implications of maintaining Earth's hemispheric albedo symmetry for shortwave radiative feedbacks |
title_full_unstemmed |
The implications of maintaining Earth's hemispheric albedo symmetry for shortwave radiative feedbacks |
title_sort |
implications of maintaining earth's hemispheric albedo symmetry for shortwave radiative feedbacks |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/esd-14-345-2023 https://noa.gwlb.de/receive/cop_mods_00065519 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00064039/esd-14-345-2023.pdf https://esd.copernicus.org/articles/14/345/2023/esd-14-345-2023.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
albedo Arctic Sea ice |
genre_facet |
albedo Arctic Sea ice |
op_relation |
Earth System Dynamics -- http://www.earth-syst-dynam.net/ -- http://www.bibliothek.uni-regensburg.de/ezeit/?2578793 -- 2190-4987 https://doi.org/10.5194/esd-14-345-2023 https://noa.gwlb.de/receive/cop_mods_00065519 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00064039/esd-14-345-2023.pdf https://esd.copernicus.org/articles/14/345/2023/esd-14-345-2023.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/esd-14-345-2023 |
container_title |
Earth System Dynamics |
container_volume |
14 |
container_issue |
2 |
container_start_page |
345 |
op_container_end_page |
365 |
_version_ |
1766237177590579200 |