http://onlinelibrary.wiley.com/doi/10.1002/2017JD026888/abstract
Sensitivity of aerosol distribution and climate response to stratospheric SO 2 injection locations† <http://onlinelibrary.wiley.com/doi/10.1002/2017JD026888/abstract#jgrd54158-note-0001> Authors - Simone Tilmes, - <[email protected]> - <http://orcid.org/0000-0002-6557-3569> 1. 2. - <[email protected]> <http://onlinelibrary.wiley.com/advanced/search/results?searchRowCriteria%5B0%5D.fieldName=author&start=1&resultsPerPage=20&searchRowCriteria%5B0%5D.queryString=%22Simone%20Tilmes%22> - Jadwiga H. Richter, - <http://orcid.org/0000-0001-7048-0781> 1. <http://onlinelibrary.wiley.com/advanced/search/results?searchRowCriteria%5B0%5D.fieldName=author&start=1&resultsPerPage=20&searchRowCriteria%5B0%5D.queryString=%22Jadwiga%20H.%20Richter%22> - Michael J. Mills, - <http://orcid.org/0000-0002-8054-1346> 1. <http://onlinelibrary.wiley.com/advanced/search/results?searchRowCriteria%5B0%5D.fieldName=author&start=1&resultsPerPage=20&searchRowCriteria%5B0%5D.queryString=%22Michael%20J.%20Mills%22> - Ben Kravitz, - <http://orcid.org/0000-0001-6318-1150> 1. <http://onlinelibrary.wiley.com/advanced/search/results?searchRowCriteria%5B0%5D.fieldName=author&start=1&resultsPerPage=20&searchRowCriteria%5B0%5D.queryString=%22Ben%20Kravitz%22> - Douglas G. MacMartin, - <http://orcid.org/0000-0003-1987-9417> 1. 2. <http://onlinelibrary.wiley.com/advanced/search/results?searchRowCriteria%5B0%5D.fieldName=author&start=1&resultsPerPage=20&searchRowCriteria%5B0%5D.queryString=%22Douglas%20G.%20MacMartin%22> - Francis Vitt, - <http://orcid.org/0000-0002-8684-214X> 1. <http://onlinelibrary.wiley.com/advanced/search/results?searchRowCriteria%5B0%5D.fieldName=author&start=1&resultsPerPage=20&searchRowCriteria%5B0%5D.queryString=%22Francis%20Vitt%22> - Joseph J. Tribbia, - <http://orcid.org/0000-0003-1639-9688> 1. <http://onlinelibrary.wiley.com/advanced/search/results?searchRowCriteria%5B0%5D.fieldName=author&start=1&resultsPerPage=20&searchRowCriteria%5B0%5D.queryString=%22Joseph%20J.%20Tribbia%22> - Jean-Francois Lamarque - <http://orcid.org/0000-0002-4225-5074> 1. <http://onlinelibrary.wiley.com/advanced/search/results?searchRowCriteria%5B0%5D.fieldName=author&start=1&resultsPerPage=20&searchRowCriteria%5B0%5D.queryString=%22Jean%E2%80%90Francois%20Lamarque%22> - Accepted manuscript online:6 November 2017Full publication history <http://onlinelibrary.wiley.com/doi/10.1002/2017JD026888/abstract#publication-history> - DOI:10.1002/2017JD026888 View/save citation <http://onlinelibrary.wiley.com/enhanced/exportCitation/doi/10.1002/2017JD026888> - Cited by (CrossRef):0 articlesCheck for updates <http://onlinelibrary.wiley.com/enhanced/refreshCitedBy?doi=10.1002/2017JD026888&refreshCitedByCounter=true> Citation tools - <https://www.altmetric.com/details.php?domain=onlinelibrary.wiley.com&doi=10.1002%2F2017jd026888> - †This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as doi: 10.1002/2017jd026888 Abstract Injection of SO2 into the stratosphere has been proposed as a method to in part counteract anthropogenic climate change. So far, most studies investigated injections at the equator or in a region in the tropics. Here, we use CESM1(WACCM) to explore the impact of continuous single grid point SO 2injections at 7 different latitudes and 2 altitudes in the stratosphere on aerosol distribution and climate. For each of the 14 locations, 3 different constant SO2 emission rates were tested to identify linearity in aerosol burden, aerosol optical depth, and climate effects. We found that injections at 15° N and 15° S and at 25 km altitude have equal or greater effect on radiation and surface temperature than injections at the equator. Non-equatorial injections transport SO2 and sulfate aerosols more efficiently into middle and high latitudes and result in particles of smaller effective radius and larger aerosol burden in middle and high latitudes. Injections at 15° S produce the largest increase in global average aerosol optical depth, and increase the change in radiative forcing per Tg SO2/yr by about 15% compared to equatorial injections. High altitude injections at 15° N produce the largest reduction in global average temperature of 0.2 degrees per Tg S/yr for the last 7 years of a ten year experiment. Injections at higher altitude are generally more efficient at reducing surface temperature, with the exception of large equatorial injections of at least 12 Tg SO2/yr. These findings have important implications for designing a strategy to counteract global climate change -- You received this message because you are subscribed to the Google Groups "geoengineering" group. 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