气候变化领域集成服务门户(CCPortal): Nonlinearity of the cloud response postpones climate penalty of mitigating air pollution in polluted regions

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DOI	10.1038/s41558-023-01775-5
	Nonlinearity of the cloud response postpones climate penalty of mitigating air pollution in polluted regions
	Jia, Hailing; Quaas, Johannes
发表日期	2023
ISSN	1758-678X
EISSN	1758-6798
起始页码	943
结束页码	+
卷号	13 期号:9
英文摘要	Cloud droplet number concentrations are often assumed to depend linearly on atmospheric aerosols (in log-log space). Here the authors show that this relationship is instead sigmoid, which delays additional warming due to air pollution mitigation by 20-30 years in heavily polluted regions. Aerosol-cloud interactions contribute substantially to uncertainties in anthropogenic forcing, in which the sensitivity of cloud droplet number concentration (N-d) to aerosol plays a central role. Here we use satellite observations to show that the aerosol-N-d relation (in log-log space) is not linear as commonly assumed. Instead, the N-d sensitivity decreases at large aerosol concentrations due to the transition from aerosol-limited to updraft-limited regime, making the widely used linear method problematic. A sigmoidal transition is shown to adequately fit the data. When using this revised relationship, the additional warming that arises from air pollution mitigation is delayed by two to three decades in heavily polluted locations, compared to the linear relationship. This cloud-mediated climate penalty will manifest markedly starting around 2025 in China and 2050 in India after applying the strongest air quality policy, underlining the urgency of mitigating greenhouse gas emissions.
英文关键词	SULFUR-DIOXIDE; ANTHROPOGENIC EMISSIONS; REACTIVE GASES; AEROSOL; MODIS; NUMBER; MODEL; PARAMETERIZATION; UNCERTAINTY; ACTIVATION
WOS研究方向	Environmental Sciences ; Environmental Studies ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:001049926500003
来源期刊	Nature Climate Change
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282496
作者单位	Leipzig University
推荐引用方式 GB/T 7714	Jia, Hailing,Quaas, Johannes. Nonlinearity of the cloud response postpones climate penalty of mitigating air pollution in polluted regions[J],2023,13(9).
APA	Jia, Hailing,&Quaas, Johannes.(2023).Nonlinearity of the cloud response postpones climate penalty of mitigating air pollution in polluted regions.Nature Climate Change,13(9).
MLA	Jia, Hailing,et al."Nonlinearity of the cloud response postpones climate penalty of mitigating air pollution in polluted regions".Nature Climate Change 13.9(2023).