http://onlinelibrary.wiley.com/doi/10.1002/2017JD026868/abstract
The climate response to stratospheric aerosol geoengineering can be tailored using multiple injection locations† <http://onlinelibrary.wiley.com/doi/10.1002/2017JD026868/abstract#jgrd54212-note-0001> Authors - Douglas G. MacMartin, - <[email protected]> - <http://orcid.org/0000-0003-1987-9417> 1. 2. - <[email protected]> <http://onlinelibrary.wiley.com/advanced/search/results?searchRowCriteria%5B0%5D.fieldName=author&start=1&resultsPerPage=20&searchRowCriteria%5B0%5D.queryString=%22Douglas%20G.%20MacMartin%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> - Simone Tilmes, - <http://orcid.org/0000-0002-6557-3569> 1. 2. <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> - Jean-Francois Lamarque, - <http://orcid.org/0000-0002-4225-5074> 1. 2. <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> - 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> - 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> - Accepted manuscript online:6 November 2017Full publication history <http://onlinelibrary.wiley.com/doi/10.1002/2017JD026868/abstract#publication-history> - DOI:10.1002/2017JD026868 View/save citation <http://onlinelibrary.wiley.com/enhanced/exportCitation/doi/10.1002/2017JD026868> - Cited by (CrossRef):0 articlesCheck for updates <http://onlinelibrary.wiley.com/enhanced/refreshCitedBy?doi=10.1002/2017JD026868&refreshCitedByCounter=true> Citation tools - <https://www.altmetric.com/details.php?domain=onlinelibrary.wiley.com&doi=10.1002%2F2017jd026868> - †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: 10.1002/2017jd026868 Abstract By injecting different amounts of SO2 at multiple different latitudes, the spatial pattern of aerosol optical depth (AOD) can be partially controlled. This leads to the ability to influence the climate response to geoengineering with stratospheric aerosols, providing the potential for design. We use simulations from the fully-coupled whole-atmosphere chemistry-climate model CESM1(WACCM) to demonstrate that by appropriately combining injection at just four different locations, 30° S, 15° S, 15° N, and 30° N, then three spatial degrees of freedom of AOD can be achieved: an approximately spatially-uniform AOD distribution, the relative difference in AOD between Northern and Southern hemispheres, and the relative AOD in high versus low latitudes. For forcing levels that yield 1–2° C cooling, the AOD and surface temperature response are sufficiently linear in this model so that the response to different combinations of injection at different latitudes can be estimated from single-latitude injection simulations; nonlinearities associated with both aerosol growth and changes to stratospheric circulation will be increasingly important at higher forcing levels. Optimized injection at multiple locations is predicted to improve compensation of CO2-forced climate change relative to a case using only equatorial aerosol injection (which overcools the tropics relative to high latitudes). The additional degrees of freedom can be used, for example, to balance the interhemispheric temperature gradient and the equator to pole temperature gradient in addition to the global mean temperature. Further research is needed to better quantify the impacts of these strategies on changes to long-term temperature, precipitation, and other climate parameters -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/geoengineering. For more options, visit https://groups.google.com/d/optout.
