气候变化领域集成服务门户(CCPortal): Impact of industrial versus biomass burning aerosols on the Atlantic Meridional Overturning Circulation

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DOI	10.1038/s41612-024-00602-8
	Impact of industrial versus biomass burning aerosols on the Atlantic Meridional Overturning Circulation
	Allen, Robert J.; Vega, Claire; Yao, Eva; Liu, Wei
发表日期	2024
ISSN	2397-3722
起始页码	7
结束页码	1
卷号	7 期号:1
英文摘要	The ocean's major circulation system, the Atlantic Meridional Overturning Circulation (AMOC), is slowing down. Such weakening is consistent with warming associated with increasing greenhouse gases, as well as with recent decreases in industrial aerosol pollution. The impact of biomass burning aerosols on the AMOC, however, remains unexplored. Here, we use the Community Earth System Model version 1 Large Ensemble to quantify the impact of both aerosol types on the AMOC. Despite relatively small changes in North Atlantic biomass burning aerosols, significant AMOC evolution occurs, including weakening from 1920 to similar to 1970 followed by AMOC strengthening. These changes are largely out of phase relative to the corresponding AMOC evolution under industrial aerosols. AMOC responses are initiated by thermal changes in sea surface density flux due to altered shortwave radiation. An additional dynamical mechanism involving the North Atlantic sea-level pressure gradient is important under biomass-burning aerosols. AMOC-induced ocean salinity flux convergence acts as a positive feedback. Our results show that biomass-burning aerosols reinforce early 20th-century AMOC weakening associated with greenhouse gases and also partially mute industrial aerosol impacts on the AMOC. Recent increases in wildfires suggest biomass-burning aerosols may be an important driver of future AMOC variability.
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:001179600300002
来源期刊	NPJ CLIMATE AND ATMOSPHERIC SCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/294195
作者单位	University of California System; University of California Riverside
推荐引用方式 GB/T 7714	Allen, Robert J.,Vega, Claire,Yao, Eva,et al. Impact of industrial versus biomass burning aerosols on the Atlantic Meridional Overturning Circulation[J],2024,7(1).
APA	Allen, Robert J.,Vega, Claire,Yao, Eva,&Liu, Wei.(2024).Impact of industrial versus biomass burning aerosols on the Atlantic Meridional Overturning Circulation.NPJ CLIMATE AND ATMOSPHERIC SCIENCE,7(1).
MLA	Allen, Robert J.,et al."Impact of industrial versus biomass burning aerosols on the Atlantic Meridional Overturning Circulation".NPJ CLIMATE AND ATMOSPHERIC SCIENCE 7.1(2024).