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DOI | 10.5194/acp-21-665-2021 |
Opinion: Cloud-phase climate feedback and the importance of ice-nucleating particles | |
Benjamin J. Murray, Kenneth S. Carslaw, and Paul R. Field | |
2021-01-18 | |
发表期刊 | Atmospheric Chemistry and Physics |
出版年 | 2021 |
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. |
领域 | 地球科学 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/312258 |
专题 | 地球科学 |
推荐引用方式 GB/T 7714 | Benjamin J. Murray, Kenneth S. Carslaw, and Paul R. Field. Opinion: Cloud-phase climate feedback and the importance of ice-nucleating particles[J]. Atmospheric Chemistry and Physics,2021. |
APA | Benjamin J. Murray, Kenneth S. Carslaw, and Paul R. Field.(2021).Opinion: Cloud-phase climate feedback and the importance of ice-nucleating particles.Atmospheric Chemistry and Physics. |
MLA | Benjamin J. Murray, Kenneth S. Carslaw, and Paul R. Field."Opinion: Cloud-phase climate feedback and the importance of ice-nucleating particles".Atmospheric Chemistry and Physics (2021). |
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