气候变化领域集成服务门户(CCPortal): Opinion: Cloud-phase climate feedback and the importance of ice-nucleating particles

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DOI	10.5194/acp-21-665-2021
	Opinion: Cloud-phase climate feedback and the importance of ice-nucleating particles
	Murray B.J.; Carslaw K.S.; Field P.R.
发表日期	2021
ISSN	1680-7316
起始页码	665
结束页码	679
卷号	21 期号:2
英文摘要	Shallow clouds covering vast areas of the world's middle-and high-latitude oceans play a key role in dampening the global temperature rise associated with CO2. These clouds, which contain both ice and supercooled water, respond to a warming world by transitioning to a state with more liquid water and a greater albedo, resulting in a negative "cloud-phase" climate feedback component. Here we argue that the magnitude of the negative cloud-phase feedback component depends on the amount and nature of the small fraction of aerosol particles that can nucleate ice crystals. We propose that a concerted research effort is required to reduce substantial uncertainties related to the poorly understood sources, concentration, seasonal cycles and nature of these ice-nucleating particles (INPs) and their rudimentary treatment in climate models. The topic is important because many climate models may have overestimated the magnitude of the cloud-phase feedback, and those with better representation of shallow oceanic clouds predict a substantially larger climate warming. We make the case that understanding the present-day INP population in shallow clouds in the cold sector of cyclone systems is particularly critical for defining present-day cloud phase and therefore how the clouds respond to warming. We also need to develop a predictive capability for future INP emissions and sinks in a warmer world with less ice and snow and potentially stronger INP sources. © 2021 Mary Ann Liebert Inc.. All rights reserved.
英文关键词	aerosol; climate feedback; climate modeling; cloud cover; cloud microphysics; marine atmosphere; particulate matter; seasonal variation; supercooling; uncertainty analysis
语种	英语
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/168832
作者单位	Institute for Climate and Atmospheric Science, School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, United Kingdom; Met Office, Exeter, EX1 3PB, United Kingdom
推荐引用方式 GB/T 7714	Murray B.J.,Carslaw K.S.,Field P.R.. Opinion: Cloud-phase climate feedback and the importance of ice-nucleating particles[J],2021,21(2).
APA	Murray B.J.,Carslaw K.S.,&Field P.R..(2021).Opinion: Cloud-phase climate feedback and the importance of ice-nucleating particles.Atmospheric Chemistry and Physics,21(2).
MLA	Murray B.J.,et al."Opinion: Cloud-phase climate feedback and the importance of ice-nucleating particles".Atmospheric Chemistry and Physics 21.2(2021).