Impact of geoengineered aerosols on the troposphere and stratosphere
A coupled chemistry climate model, the Whole Atmosphere Community Climate Model was used to perform a transient climate simulation to quantify the impact of geoengineered aerosols on atmospheric processes. In contrast to previous model studies, the impact on stratospheric chemistry, including hetero...
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American Geophysical Union
2009
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ftncar:oai:drupal-site.org:articles_15274 2023-09-05T13:14:05+02:00 Impact of geoengineered aerosols on the troposphere and stratosphere Tilmes, Simone (author) Garcia, Rolando (author) Kinnison, Douglas (author) Gettelman, Andrew (author) Rasch, Philip (author) 2009-06-27 application/pdf http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-002-123 https://doi.org/10.1029/2008JD011420 en eng American Geophysical Union Journal of Geophysical Research-Atmospheres http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-002-123 doi:10.1029/2008JD011420 ark:/85065/d70p1118 An edited version of this paper was published by AGU. Copyright 2009 American Geophysical Union. Text article 2009 ftncar https://doi.org/10.1029/2008JD011420 2023-08-14T18:36:03Z A coupled chemistry climate model, the Whole Atmosphere Community Climate Model was used to perform a transient climate simulation to quantify the impact of geoengineered aerosols on atmospheric processes. In contrast to previous model studies, the impact on stratospheric chemistry, including heterogeneous chemistry in the polar regions, is considered in this simulation. In the geoengineering simulation, a constant stratospheric distribution of volcanic-sized, liquid sulfate aerosols is imposed in the period 2020-2050, corresponding to an injection of 2 Tg S/a. The aerosol cools the troposphere compared to a baseline simulation. Assuming an Intergovernmental Panel on Climate Change A1B emission scenario, global warming is delayed by about 40 years in the troposphere with respect to the baseline scenario. Large local changes of precipitation and temperatures may occur as a result of geoengineering. Comparison with simulations carried out with the Community Atmosphere Model indicates the importance of stratospheric processes for estimating the impact of stratospheric aerosols on the Earth's climate. Changes in stratospheric dynamics and chemistry, especially faster heterogeneous reactions, reduce the recovery of the ozone layer in middle and high latitudes for the Southern Hemisphere. In the geoengineering case, the recovery of the Antarctic ozone hole is delayed by about 30 years on the basis of this model simulation. For the Northern Hemisphere, a onefold to twofold increase of the chemical ozone depletion occurs owing to a simulated stronger polar vortex and colder temperatures compared to the baseline simulation, in agreement with observational estimates. Article in Journal/Newspaper Antarc* Antarctic OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Antarctic The Antarctic Journal of Geophysical Research 114 D12 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
A coupled chemistry climate model, the Whole Atmosphere Community Climate Model was used to perform a transient climate simulation to quantify the impact of geoengineered aerosols on atmospheric processes. In contrast to previous model studies, the impact on stratospheric chemistry, including heterogeneous chemistry in the polar regions, is considered in this simulation. In the geoengineering simulation, a constant stratospheric distribution of volcanic-sized, liquid sulfate aerosols is imposed in the period 2020-2050, corresponding to an injection of 2 Tg S/a. The aerosol cools the troposphere compared to a baseline simulation. Assuming an Intergovernmental Panel on Climate Change A1B emission scenario, global warming is delayed by about 40 years in the troposphere with respect to the baseline scenario. Large local changes of precipitation and temperatures may occur as a result of geoengineering. Comparison with simulations carried out with the Community Atmosphere Model indicates the importance of stratospheric processes for estimating the impact of stratospheric aerosols on the Earth's climate. Changes in stratospheric dynamics and chemistry, especially faster heterogeneous reactions, reduce the recovery of the ozone layer in middle and high latitudes for the Southern Hemisphere. In the geoengineering case, the recovery of the Antarctic ozone hole is delayed by about 30 years on the basis of this model simulation. For the Northern Hemisphere, a onefold to twofold increase of the chemical ozone depletion occurs owing to a simulated stronger polar vortex and colder temperatures compared to the baseline simulation, in agreement with observational estimates. |
author2 |
Tilmes, Simone (author) Garcia, Rolando (author) Kinnison, Douglas (author) Gettelman, Andrew (author) Rasch, Philip (author) |
format |
Article in Journal/Newspaper |
title |
Impact of geoengineered aerosols on the troposphere and stratosphere |
spellingShingle |
Impact of geoengineered aerosols on the troposphere and stratosphere |
title_short |
Impact of geoengineered aerosols on the troposphere and stratosphere |
title_full |
Impact of geoengineered aerosols on the troposphere and stratosphere |
title_fullStr |
Impact of geoengineered aerosols on the troposphere and stratosphere |
title_full_unstemmed |
Impact of geoengineered aerosols on the troposphere and stratosphere |
title_sort |
impact of geoengineered aerosols on the troposphere and stratosphere |
publisher |
American Geophysical Union |
publishDate |
2009 |
url |
http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-002-123 https://doi.org/10.1029/2008JD011420 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
Journal of Geophysical Research-Atmospheres http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-002-123 doi:10.1029/2008JD011420 ark:/85065/d70p1118 |
op_rights |
An edited version of this paper was published by AGU. Copyright 2009 American Geophysical Union. |
op_doi |
https://doi.org/10.1029/2008JD011420 |
container_title |
Journal of Geophysical Research |
container_volume |
114 |
container_issue |
D12 |
_version_ |
1776205137226760192 |