Opinion: Cloud-phase climate feedback and the importance of ice-nucleatingparticles

doi:10.5194/acp-21-665-2021

GSTDTAP > 资源环境科学

DOI	10.5194/acp-21-665-2021
	Opinion: Cloud-phase climate feedback and the importance of ice-nucleatingparticles
	admin
	2021-02-05
出版年	2021
国家	欧洲
领域	气候变化 ; 资源环境
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 temperaturerise associated with CO2. These clouds, which contain both ice andsupercooled water, respond to a warming world by transitioning to a statewith more liquid water and a greater albedo, resulting in a negative“cloud-phase” climate feedback component. Here we argue that the magnitudeof the negative cloud-phase feedback component depends on the amount andnature of the small fraction of aerosol particles that can nucleate icecrystals. We propose that a concerted research effort is required to reducesubstantial uncertainties related to the poorly understoodsources, concentration, seasonal cycles and nature of these ice-nucleatingparticles (INPs) and their rudimentary treatment in climate models. Thetopic is important because many climate models may have overestimated themagnitude of the cloud-phase feedback, and those with better representationof shallow oceanic clouds predict a substantially larger climate warming. Wemake the case that understanding the present-day INP population in shallowclouds in the cold sector of cyclone systems is particularly critical fordefining present-day cloud phase and therefore how the clouds respond towarming. We also need to develop a predictive capability for future INPemissions and sinks in a warmer world with less ice and snow and potentiallystronger INP sources.
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来源平台	European Geosciences Union
引用统计
文献类型	科技报告
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/314104
专题	资源环境科学气候变化
推荐引用方式 GB/T 7714	admin. Opinion: Cloud-phase climate feedback and the importance of ice-nucleatingparticles,2021.