Reaching 1.5 and 2.0 ◦C global surface temperature targets using stratospheric aerosol geoengineering
A new set of stratospheric aerosol geoengineering (SAG) model experiments has been performed with Community Earth System Model version 2 (CESM2) with the Whole Atmosphere Community Climate Model (WACCM6) that are based on the Coupled Model Intercomparison Project phase 6 (CMIP6) overshoot scenario (...
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ftutexasriogrand:oai:scholarworks.utrgv.edu:eems_fac-1037 2023-05-15T14:02:16+02:00 Reaching 1.5 and 2.0 ◦C global surface temperature targets using stratospheric aerosol geoengineering Tilmes, Simone MacMartin, Douglas G. Lenaerts, Jan T. M. Kampenhout, Leo van Muntjewerf, Laura Xia, Lili Harrison, Cheryl S. Krumhardt, Kristen M. Mills, Michael J. Kravitz, Ben Robock, Alan 2020-07-14T07:00:00Z application/pdf https://scholarworks.utrgv.edu/eems_fac/37 https://scholarworks.utrgv.edu/cgi/viewcontent.cgi?article=1037&context=eems_fac unknown ScholarWorks @ UTRGV https://scholarworks.utrgv.edu/eems_fac/37 https://scholarworks.utrgv.edu/cgi/viewcontent.cgi?article=1037&context=eems_fac http://creativecommons.org/licenses/by/4.0/ CC-BY Earth, Environmental, and Marine Sciences Faculty Publications and Presentations MARINE PRIMARY PRODUCTION ICE-SHEET CLIMATE IMPACTS DESIGN GREENLAND VERSION Earth Sciences Environmental Sciences Marine Biology text 2020 ftutexasriogrand 2022-10-22T17:21:24Z A new set of stratospheric aerosol geoengineering (SAG) model experiments has been performed with Community Earth System Model version 2 (CESM2) with the Whole Atmosphere Community Climate Model (WACCM6) that are based on the Coupled Model Intercomparison Project phase 6 (CMIP6) overshoot scenario (SSP5-34-OS) as a baseline scenario to limit global warming to 1.5 or 2.0 ◦C above 1850–1900 conditions. The overshoot scenario allows us to applying a peak-shaving scenario that reduces the needed duration and amount of SAG application compared to a high forcing scenario. In addition, a feedback algorithm identifies the needed amount of sulfur dioxide injections in the stratosphere at four pre-defined latitudes, 30◦ N, 15◦ N, 15◦ S, and 30◦ S, to reach three surface temperature targets: global mean temperature, and interhemispheric and pole-to-Equator temperature gradients. These targets further help to reduce side effects, including overcooling in the tropics, warming of high latitudes, and large shifts in precipitation patterns. These experiments are therefore relevant for investigating the impacts on society and ecosystems. Comparisons to SAG simulations based on a high emission pathway baseline scenario (SSP5-85) are also performed to investigate the dependency of impacts using different injection amounts to offset surface warming by SAG. We find that changes from present-day conditions around 2020 in some variables depend strongly on the defined temperature target (1.5 ◦C vs. 2.0 ◦C). These include surface air temperature and related impacts, the Atlantic Meridional Overturning Circulation, which impacts ocean net primary productivity, and changes in ice sheet surface mass balance, which impacts sea level rise. Others, including global precipitation changes and the recovery of the Antarctic ozone hole, depend strongly on the amount of SAG application. Furthermore, land net primary productivity as well as ocean acidification depend mostly on the global atmospheric CO2 concentration and therefore the baseline ... Text Antarc* Antarctic Greenland Ice Sheet Ocean acidification Scholarworks@UTRGV (The University of Texas RioGrande Valley) Antarctic Greenland The Antarctic |
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Open Polar |
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Scholarworks@UTRGV (The University of Texas RioGrande Valley) |
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MARINE PRIMARY PRODUCTION ICE-SHEET CLIMATE IMPACTS DESIGN GREENLAND VERSION Earth Sciences Environmental Sciences Marine Biology |
spellingShingle |
MARINE PRIMARY PRODUCTION ICE-SHEET CLIMATE IMPACTS DESIGN GREENLAND VERSION Earth Sciences Environmental Sciences Marine Biology Tilmes, Simone MacMartin, Douglas G. Lenaerts, Jan T. M. Kampenhout, Leo van Muntjewerf, Laura Xia, Lili Harrison, Cheryl S. Krumhardt, Kristen M. Mills, Michael J. Kravitz, Ben Robock, Alan Reaching 1.5 and 2.0 ◦C global surface temperature targets using stratospheric aerosol geoengineering |
topic_facet |
MARINE PRIMARY PRODUCTION ICE-SHEET CLIMATE IMPACTS DESIGN GREENLAND VERSION Earth Sciences Environmental Sciences Marine Biology |
description |
A new set of stratospheric aerosol geoengineering (SAG) model experiments has been performed with Community Earth System Model version 2 (CESM2) with the Whole Atmosphere Community Climate Model (WACCM6) that are based on the Coupled Model Intercomparison Project phase 6 (CMIP6) overshoot scenario (SSP5-34-OS) as a baseline scenario to limit global warming to 1.5 or 2.0 ◦C above 1850–1900 conditions. The overshoot scenario allows us to applying a peak-shaving scenario that reduces the needed duration and amount of SAG application compared to a high forcing scenario. In addition, a feedback algorithm identifies the needed amount of sulfur dioxide injections in the stratosphere at four pre-defined latitudes, 30◦ N, 15◦ N, 15◦ S, and 30◦ S, to reach three surface temperature targets: global mean temperature, and interhemispheric and pole-to-Equator temperature gradients. These targets further help to reduce side effects, including overcooling in the tropics, warming of high latitudes, and large shifts in precipitation patterns. These experiments are therefore relevant for investigating the impacts on society and ecosystems. Comparisons to SAG simulations based on a high emission pathway baseline scenario (SSP5-85) are also performed to investigate the dependency of impacts using different injection amounts to offset surface warming by SAG. We find that changes from present-day conditions around 2020 in some variables depend strongly on the defined temperature target (1.5 ◦C vs. 2.0 ◦C). These include surface air temperature and related impacts, the Atlantic Meridional Overturning Circulation, which impacts ocean net primary productivity, and changes in ice sheet surface mass balance, which impacts sea level rise. Others, including global precipitation changes and the recovery of the Antarctic ozone hole, depend strongly on the amount of SAG application. Furthermore, land net primary productivity as well as ocean acidification depend mostly on the global atmospheric CO2 concentration and therefore the baseline ... |
format |
Text |
author |
Tilmes, Simone MacMartin, Douglas G. Lenaerts, Jan T. M. Kampenhout, Leo van Muntjewerf, Laura Xia, Lili Harrison, Cheryl S. Krumhardt, Kristen M. Mills, Michael J. Kravitz, Ben Robock, Alan |
author_facet |
Tilmes, Simone MacMartin, Douglas G. Lenaerts, Jan T. M. Kampenhout, Leo van Muntjewerf, Laura Xia, Lili Harrison, Cheryl S. Krumhardt, Kristen M. Mills, Michael J. Kravitz, Ben Robock, Alan |
author_sort |
Tilmes, Simone |
title |
Reaching 1.5 and 2.0 ◦C global surface temperature targets using stratospheric aerosol geoengineering |
title_short |
Reaching 1.5 and 2.0 ◦C global surface temperature targets using stratospheric aerosol geoengineering |
title_full |
Reaching 1.5 and 2.0 ◦C global surface temperature targets using stratospheric aerosol geoengineering |
title_fullStr |
Reaching 1.5 and 2.0 ◦C global surface temperature targets using stratospheric aerosol geoengineering |
title_full_unstemmed |
Reaching 1.5 and 2.0 ◦C global surface temperature targets using stratospheric aerosol geoengineering |
title_sort |
reaching 1.5 and 2.0 ◦c global surface temperature targets using stratospheric aerosol geoengineering |
publisher |
ScholarWorks @ UTRGV |
publishDate |
2020 |
url |
https://scholarworks.utrgv.edu/eems_fac/37 https://scholarworks.utrgv.edu/cgi/viewcontent.cgi?article=1037&context=eems_fac |
geographic |
Antarctic Greenland The Antarctic |
geographic_facet |
Antarctic Greenland The Antarctic |
genre |
Antarc* Antarctic Greenland Ice Sheet Ocean acidification |
genre_facet |
Antarc* Antarctic Greenland Ice Sheet Ocean acidification |
op_source |
Earth, Environmental, and Marine Sciences Faculty Publications and Presentations |
op_relation |
https://scholarworks.utrgv.edu/eems_fac/37 https://scholarworks.utrgv.edu/cgi/viewcontent.cgi?article=1037&context=eems_fac |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
_version_ |
1766272429051609088 |