Sensitivity of Stratospheric Geoengineering with Black Carbon to Aerosol Size and Altitude of Injection
Simulations of stratospheric geoengineering with black carbon (BC) aerosols using a general circulation model with fixed sea surface temperatures show that the climate effects strongly depend on aerosol size and altitude of injection. 1 Tg BC/a injected into the lower stratosphere would cause little...
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ftnasantrs:oai:casi.ntrs.nasa.gov:20140001055 2023-05-15T13:33:56+02:00 Sensitivity of Stratospheric Geoengineering with Black Carbon to Aerosol Size and Altitude of Injection Kravitz, Ben Robock, Alan Miller, Mark A. Shindell, Drew T. Unclassified, Unlimited, Publicly available May 4, 2012 application/pdf http://hdl.handle.net/2060/20140001055 unknown Document ID: 20140001055 http://hdl.handle.net/2060/20140001055 Copyright, Distribution as joint owner in the copyright CASI Environment Pollution GSFC-E-DAA-TN8939 Journal of Geophysical Research; 117; D9; D09203 2012 ftnasantrs 2019-07-21T00:34:36Z Simulations of stratospheric geoengineering with black carbon (BC) aerosols using a general circulation model with fixed sea surface temperatures show that the climate effects strongly depend on aerosol size and altitude of injection. 1 Tg BC/a injected into the lower stratosphere would cause little surface cooling for large radii but a large amount of surface cooling for small radii and stratospheric warming of over 60 C. With the exception of small particles, increasing the altitude of injection increases surface cooling and stratospheric warming. Stratospheric warming causes global ozone loss by up to 50% in the small radius case. The Antarctic shows less ozone loss due to reduction of polar stratospheric clouds, but strong circumpolar winds would enhance the Arctic ozone hole. Using diesel fuel to produce the aerosols is likely prohibitively expensive and infeasible. Although studying an absorbing aerosol is a useful counterpart to previous studies involving sulfate aerosols, black carbon geoengineering likely carries too many risks to make it a viable option for deployment. Other/Unknown Material Antarc* Antarctic Arctic black carbon NASA Technical Reports Server (NTRS) Arctic Antarctic The Antarctic |
institution |
Open Polar |
collection |
NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
Environment Pollution |
spellingShingle |
Environment Pollution Kravitz, Ben Robock, Alan Miller, Mark A. Shindell, Drew T. Sensitivity of Stratospheric Geoengineering with Black Carbon to Aerosol Size and Altitude of Injection |
topic_facet |
Environment Pollution |
description |
Simulations of stratospheric geoengineering with black carbon (BC) aerosols using a general circulation model with fixed sea surface temperatures show that the climate effects strongly depend on aerosol size and altitude of injection. 1 Tg BC/a injected into the lower stratosphere would cause little surface cooling for large radii but a large amount of surface cooling for small radii and stratospheric warming of over 60 C. With the exception of small particles, increasing the altitude of injection increases surface cooling and stratospheric warming. Stratospheric warming causes global ozone loss by up to 50% in the small radius case. The Antarctic shows less ozone loss due to reduction of polar stratospheric clouds, but strong circumpolar winds would enhance the Arctic ozone hole. Using diesel fuel to produce the aerosols is likely prohibitively expensive and infeasible. Although studying an absorbing aerosol is a useful counterpart to previous studies involving sulfate aerosols, black carbon geoengineering likely carries too many risks to make it a viable option for deployment. |
format |
Other/Unknown Material |
author |
Kravitz, Ben Robock, Alan Miller, Mark A. Shindell, Drew T. |
author_facet |
Kravitz, Ben Robock, Alan Miller, Mark A. Shindell, Drew T. |
author_sort |
Kravitz, Ben |
title |
Sensitivity of Stratospheric Geoengineering with Black Carbon to Aerosol Size and Altitude of Injection |
title_short |
Sensitivity of Stratospheric Geoengineering with Black Carbon to Aerosol Size and Altitude of Injection |
title_full |
Sensitivity of Stratospheric Geoengineering with Black Carbon to Aerosol Size and Altitude of Injection |
title_fullStr |
Sensitivity of Stratospheric Geoengineering with Black Carbon to Aerosol Size and Altitude of Injection |
title_full_unstemmed |
Sensitivity of Stratospheric Geoengineering with Black Carbon to Aerosol Size and Altitude of Injection |
title_sort |
sensitivity of stratospheric geoengineering with black carbon to aerosol size and altitude of injection |
publishDate |
2012 |
url |
http://hdl.handle.net/2060/20140001055 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Arctic Antarctic The Antarctic |
geographic_facet |
Arctic Antarctic The Antarctic |
genre |
Antarc* Antarctic Arctic black carbon |
genre_facet |
Antarc* Antarctic Arctic black carbon |
op_source |
CASI |
op_relation |
Document ID: 20140001055 http://hdl.handle.net/2060/20140001055 |
op_rights |
Copyright, Distribution as joint owner in the copyright |
_version_ |
1766047270003802112 |