气候变化领域集成服务门户(CCPortal): The Dependence of Ship-Polluted Marine Cloud Properties and Radiative Forcing on Background Drop Concentrations

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DOI	10.1029/2020JD033852
	The Dependence of Ship-Polluted Marine Cloud Properties and Radiative Forcing on Background Drop Concentrations
	Hu S.; Zhu Y.; Rosenfeld D.; Mao F.; Lu X.; Pan Z.; Zang L.; Gong W.
发表日期	2021
ISSN	2169897X
卷号	126 期号:7
英文摘要	Marine low clouds of the busy shipping lane in the southeast Atlantic during the springs of 2003–2015 were analyzed to study the dependence of their properties and radiative forcing on the background cloud drop concentrations (Nd-bg). The overall average cloud radiative effect within the shipping lane was larger by only −1 Wm−2 compared to the adjacent clouds. However, this near-zero averaged effect was composed of large negative cloud radiative forcing (CRF) for the cleanest (13%) of the cases with Nd-bg < 50 cm−3, which was almost neutralized by a positive CRF for the 40% of the cases with Nd-bg > 70 cm−3. A possible explanation for this positive forcing is the cloud burning effect of the black carbon from ship emissions. The negative forcing was composed of 45% for the cloud fraction (Cf) effect and 55% for the albedo effects, which included a small contribution of the liquid water path (LWP) effect. Positive Cf susceptibility to Nd-core was at maximum for the lowest Nd-bg and disappeared near 60 cm−3. The albedo susceptibility to Nd-core reached its theoretical limit of 1/3 for constant LWP when Nd-bg <40 cm−3, and diminishes to 0.2 when Nd-bg = 60 cm−3. These susceptibilities represent cause and effect relationships because the differences of aerosols caused by the ship emissions vary at a much smaller scale than meteorology. Globally, under similar environmental conditions, nearly half of the area has Nd < 50 cm−3, thus possessing the indicated large susceptibility of negative radiative forcing to anthropogenic aerosols. © 2021. American Geophysical Union. All Rights Reserved.
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185354
作者单位	School of Remote Sensing and Information Engineering, Wuhan University, Wuhan, China; School of Atmospheric Sciences, Nanjing University, Nanjing, Jiangsu, China; Joint International Research Laboratory of Atmospheric and Earth System Sciences & Institute for Climate and Global Change Research, Nanjing University, China; Institute of Earth Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel; State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan, China; Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan, China
推荐引用方式 GB/T 7714	Hu S.,Zhu Y.,Rosenfeld D.,et al. The Dependence of Ship-Polluted Marine Cloud Properties and Radiative Forcing on Background Drop Concentrations[J],2021,126(7).
APA	Hu S..,Zhu Y..,Rosenfeld D..,Mao F..,Lu X..,...&Gong W..(2021).The Dependence of Ship-Polluted Marine Cloud Properties and Radiative Forcing on Background Drop Concentrations.Journal of Geophysical Research: Atmospheres,126(7).
MLA	Hu S.,et al."The Dependence of Ship-Polluted Marine Cloud Properties and Radiative Forcing on Background Drop Concentrations".Journal of Geophysical Research: Atmospheres 126.7(2021).