气候变化领域集成服务门户(CCPortal): Impacts of three types of solar geoengineering on the Atlantic Meridional Overturning Circulation

CCPortal

DOI	10.5194/acp-22-4581-2022
	Impacts of three types of solar geoengineering on the Atlantic Meridional Overturning Circulation
	Xie, Mengdie; Moore, John C.; Zhao, Liyun; Wolovick, Michael; Muri, Helene
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	4581
结束页码	4597
卷号	22 期号:7 页码:17
英文摘要	Climate models simulate lower rates of North Atlantic heat transport under greenhouse gas climates than at present due to a reduction in the strength of the Atlantic Meridional Overturning Circulation (AMOC). Solar geoengineering whereby surface temperatures are cooled by reduction of incoming shortwave radiation may be expected to ameliorate this effect. We investigate this using six Earth system models running scenarios from GeoMIP (Geoengineering Model Intercomparison Project) in the cases of (i) reduction in the solar constant, mimicking dimming of the sun; (ii) sulfate aerosol injection into the lower equatorial stratosphere; and (iii) brightening of the ocean regions, mimicking enhancing tropospheric cloud amounts. We find that despite across-model differences, AMOC decreases are attributable to reduced air-ocean temperature differences and reduced September Arctic sea ice extent, with no significant impact from changing surface winds or precipitation - evaporation. Reversing the surface freshening of the North Atlantic overturning regions caused by decreased summer sea ice sea helps to promote AMOC. When comparing the geoengineering types after normalizing them for the differences in top-of-atmosphere radiative forcing, we find that solar dimming is more effective than either marine cloud brightening or stratospheric aerosol injection.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000779391000001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273620
作者单位	Beijing Normal University; University of Lapland; Helmholtz Association; Alfred Wegener Institute, Helmholtz Centre for Polar & Marine Research; Norwegian University of Science & Technology (NTNU)
推荐引用方式 GB/T 7714	Xie, Mengdie,Moore, John C.,Zhao, Liyun,et al. Impacts of three types of solar geoengineering on the Atlantic Meridional Overturning Circulation[J],2022,22(7):17.
APA	Xie, Mengdie,Moore, John C.,Zhao, Liyun,Wolovick, Michael,&Muri, Helene.(2022).Impacts of three types of solar geoengineering on the Atlantic Meridional Overturning Circulation.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(7),17.
MLA	Xie, Mengdie,et al."Impacts of three types of solar geoengineering on the Atlantic Meridional Overturning Circulation".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.7(2022):17.