Multidecadal trends in aerosol radiative forcing over the Arctic:Contribution of changes in anthropogenic aerosol to Arctic warming since 1980
Arctic observations show large decreases in the concentrations of sulfate and black carbon (BC) aerosols since the early 1980s. These near-term climate-forcing pollutants perturb the radiative balance of the atmosphere and may have played an important role in recent Arctic warming. We use the GEOS-C...
Published in: | Journal of Geophysical Research: Atmospheres |
---|---|
Main Authors: | , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2017
|
Subjects: | |
Online Access: | https://pure.au.dk/portal/en/publications/7a828705-df77-4de4-b1fb-c9358dcbadba https://doi.org/10.1002/2016JD025321 http://www.scopus.com/inward/record.url?scp=85015299463&partnerID=8YFLogxK |
id |
ftuniaarhuspubl:oai:pure.atira.dk:publications/7a828705-df77-4de4-b1fb-c9358dcbadba |
---|---|
record_format |
openpolar |
spelling |
ftuniaarhuspubl:oai:pure.atira.dk:publications/7a828705-df77-4de4-b1fb-c9358dcbadba 2024-05-12T07:57:13+00:00 Multidecadal trends in aerosol radiative forcing over the Arctic:Contribution of changes in anthropogenic aerosol to Arctic warming since 1980 Breider, Thomas J. Mickley, Loretta J. Jacob, Daniel J. Ge, Cui Wang, Jun Sulprizio, Melissa Payer Croft, Betty Ridley, David A. McConnell, Joseph R. Sharma, Sangeeta Husain, Liaquat Dutkiewicz, Vincent A. Eleftheriadis, Konstantinos Skov, Henrik Hopke, Phillip K. 2017-03-27 https://pure.au.dk/portal/en/publications/7a828705-df77-4de4-b1fb-c9358dcbadba https://doi.org/10.1002/2016JD025321 http://www.scopus.com/inward/record.url?scp=85015299463&partnerID=8YFLogxK eng eng https://pure.au.dk/portal/en/publications/7a828705-df77-4de4-b1fb-c9358dcbadba info:eu-repo/semantics/openAccess Breider , T J , Mickley , L J , Jacob , D J , Ge , C , Wang , J , Sulprizio , M P , Croft , B , Ridley , D A , McConnell , J R , Sharma , S , Husain , L , Dutkiewicz , V A , Eleftheriadis , K , Skov , H & Hopke , P K 2017 , ' Multidecadal trends in aerosol radiative forcing over the Arctic : Contribution of changes in anthropogenic aerosol to Arctic warming since 1980 ' , Journal of Geophysical Research: Atmospheres , vol. 122 , no. 6 , pp. 3573-3594 . https://doi.org/10.1002/2016JD025321 Arctic aerosol trends radiative forcing anthropogenic aerosol-radiation interactions BIOMASS BURNING EMISSIONS LONG-TERM TRENDS BLACK CARBON CLIMATE RESPONSE INTERANNUAL VARIABILITY ICE-CORE TRANSPORT SULFATE AIRCRAFT DISTRIBUTIONS article 2017 ftuniaarhuspubl https://doi.org/10.1002/2016JD025321 2024-04-17T23:42:41Z Arctic observations show large decreases in the concentrations of sulfate and black carbon (BC) aerosols since the early 1980s. These near-term climate-forcing pollutants perturb the radiative balance of the atmosphere and may have played an important role in recent Arctic warming. We use the GEOS-Chem global chemical transport model to construct a 3-D representation of Arctic aerosols that is generally consistent with observations and their trends from 1980 to 2010. Observations at Arctic surface sites show significant decreases in sulfate and BC mass concentrations of 2-3% per year. We find that anthropogenic aerosols yield a negative forcing over the Arctic, with an average 2005-2010 Arctic shortwave radiative forcing (RF) of -0.190.05Wm(-2) at the top of atmosphere (TOA). Anthropogenic sulfate in our study yields more strongly negative forcings over the Arctic troposphere in spring (-1.170.10Wm(-2)) than previously reported. From 1980 to 2010, TOA negative RF by Arctic aerosol declined, from -0.670.06Wm(-2) to -0.190.05Wm(-2), yielding a net TOA RF of +0.48 +/- 0.06Wm(-2). The net positive RF is due almost entirely to decreases in anthropogenic sulfate loading over the Arctic. We estimate that 1980-2010 trends in aerosol-radiation interactions over the Arctic and Northern Hemisphere midlatitudes have contributed a net warming at the Arctic surface of +0.27 +/- 0.04K, roughly one quarter of the observed warming. Our study does not consider BC emissions from gas flaring nor the regional climate response to aerosol-cloud interactions or BC deposition on snow. Article in Journal/Newspaper Arctic Arctic black carbon ice core Aarhus University: Research Arctic Journal of Geophysical Research: Atmospheres 122 6 3573 3594 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
Arctic aerosol trends radiative forcing anthropogenic aerosol-radiation interactions BIOMASS BURNING EMISSIONS LONG-TERM TRENDS BLACK CARBON CLIMATE RESPONSE INTERANNUAL VARIABILITY ICE-CORE TRANSPORT SULFATE AIRCRAFT DISTRIBUTIONS |
spellingShingle |
Arctic aerosol trends radiative forcing anthropogenic aerosol-radiation interactions BIOMASS BURNING EMISSIONS LONG-TERM TRENDS BLACK CARBON CLIMATE RESPONSE INTERANNUAL VARIABILITY ICE-CORE TRANSPORT SULFATE AIRCRAFT DISTRIBUTIONS Breider, Thomas J. Mickley, Loretta J. Jacob, Daniel J. Ge, Cui Wang, Jun Sulprizio, Melissa Payer Croft, Betty Ridley, David A. McConnell, Joseph R. Sharma, Sangeeta Husain, Liaquat Dutkiewicz, Vincent A. Eleftheriadis, Konstantinos Skov, Henrik Hopke, Phillip K. Multidecadal trends in aerosol radiative forcing over the Arctic:Contribution of changes in anthropogenic aerosol to Arctic warming since 1980 |
topic_facet |
Arctic aerosol trends radiative forcing anthropogenic aerosol-radiation interactions BIOMASS BURNING EMISSIONS LONG-TERM TRENDS BLACK CARBON CLIMATE RESPONSE INTERANNUAL VARIABILITY ICE-CORE TRANSPORT SULFATE AIRCRAFT DISTRIBUTIONS |
description |
Arctic observations show large decreases in the concentrations of sulfate and black carbon (BC) aerosols since the early 1980s. These near-term climate-forcing pollutants perturb the radiative balance of the atmosphere and may have played an important role in recent Arctic warming. We use the GEOS-Chem global chemical transport model to construct a 3-D representation of Arctic aerosols that is generally consistent with observations and their trends from 1980 to 2010. Observations at Arctic surface sites show significant decreases in sulfate and BC mass concentrations of 2-3% per year. We find that anthropogenic aerosols yield a negative forcing over the Arctic, with an average 2005-2010 Arctic shortwave radiative forcing (RF) of -0.190.05Wm(-2) at the top of atmosphere (TOA). Anthropogenic sulfate in our study yields more strongly negative forcings over the Arctic troposphere in spring (-1.170.10Wm(-2)) than previously reported. From 1980 to 2010, TOA negative RF by Arctic aerosol declined, from -0.670.06Wm(-2) to -0.190.05Wm(-2), yielding a net TOA RF of +0.48 +/- 0.06Wm(-2). The net positive RF is due almost entirely to decreases in anthropogenic sulfate loading over the Arctic. We estimate that 1980-2010 trends in aerosol-radiation interactions over the Arctic and Northern Hemisphere midlatitudes have contributed a net warming at the Arctic surface of +0.27 +/- 0.04K, roughly one quarter of the observed warming. Our study does not consider BC emissions from gas flaring nor the regional climate response to aerosol-cloud interactions or BC deposition on snow. |
format |
Article in Journal/Newspaper |
author |
Breider, Thomas J. Mickley, Loretta J. Jacob, Daniel J. Ge, Cui Wang, Jun Sulprizio, Melissa Payer Croft, Betty Ridley, David A. McConnell, Joseph R. Sharma, Sangeeta Husain, Liaquat Dutkiewicz, Vincent A. Eleftheriadis, Konstantinos Skov, Henrik Hopke, Phillip K. |
author_facet |
Breider, Thomas J. Mickley, Loretta J. Jacob, Daniel J. Ge, Cui Wang, Jun Sulprizio, Melissa Payer Croft, Betty Ridley, David A. McConnell, Joseph R. Sharma, Sangeeta Husain, Liaquat Dutkiewicz, Vincent A. Eleftheriadis, Konstantinos Skov, Henrik Hopke, Phillip K. |
author_sort |
Breider, Thomas J. |
title |
Multidecadal trends in aerosol radiative forcing over the Arctic:Contribution of changes in anthropogenic aerosol to Arctic warming since 1980 |
title_short |
Multidecadal trends in aerosol radiative forcing over the Arctic:Contribution of changes in anthropogenic aerosol to Arctic warming since 1980 |
title_full |
Multidecadal trends in aerosol radiative forcing over the Arctic:Contribution of changes in anthropogenic aerosol to Arctic warming since 1980 |
title_fullStr |
Multidecadal trends in aerosol radiative forcing over the Arctic:Contribution of changes in anthropogenic aerosol to Arctic warming since 1980 |
title_full_unstemmed |
Multidecadal trends in aerosol radiative forcing over the Arctic:Contribution of changes in anthropogenic aerosol to Arctic warming since 1980 |
title_sort |
multidecadal trends in aerosol radiative forcing over the arctic:contribution of changes in anthropogenic aerosol to arctic warming since 1980 |
publishDate |
2017 |
url |
https://pure.au.dk/portal/en/publications/7a828705-df77-4de4-b1fb-c9358dcbadba https://doi.org/10.1002/2016JD025321 http://www.scopus.com/inward/record.url?scp=85015299463&partnerID=8YFLogxK |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic black carbon ice core |
genre_facet |
Arctic Arctic black carbon ice core |
op_source |
Breider , T J , Mickley , L J , Jacob , D J , Ge , C , Wang , J , Sulprizio , M P , Croft , B , Ridley , D A , McConnell , J R , Sharma , S , Husain , L , Dutkiewicz , V A , Eleftheriadis , K , Skov , H & Hopke , P K 2017 , ' Multidecadal trends in aerosol radiative forcing over the Arctic : Contribution of changes in anthropogenic aerosol to Arctic warming since 1980 ' , Journal of Geophysical Research: Atmospheres , vol. 122 , no. 6 , pp. 3573-3594 . https://doi.org/10.1002/2016JD025321 |
op_relation |
https://pure.au.dk/portal/en/publications/7a828705-df77-4de4-b1fb-c9358dcbadba |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/2016JD025321 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
122 |
container_issue |
6 |
container_start_page |
3573 |
op_container_end_page |
3594 |
_version_ |
1798837608514584576 |