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DOI	10.5194/acp-21-14079-2021
	Linear relationship between effective radius and precipitation water content near the top of convective clouds: measurement results from ACRIDICON-CHUVA campaign
	Braga R.C.; Rosenfeld D.; Krüger O.O.; Ervens B.; Holanda B.A.; Wendisch M.; Krisna T.; Pöschl U.; Andreae M.O.; Voigt C.; Pöhlker M.L.
发表日期	2021
ISSN	1680-7316
起始页码	14079
结束页码	14088
卷号	21 期号:18
英文摘要	Quantifying the precipitation within clouds is a crucial challenge to improve our current understanding of the Earth's hydrological cycle.We have investigated the relationship between the effective radius of droplets and ice particles (re) and precipitation water content (PWC) measured by cloud probes near the top of growing convective cumuli. The data for this study were collected during the ACRIDICON- CHUVA campaign on the HALO research aircraft in clean and polluted conditions over the Amazon Basin and over the western tropical Atlantic in September 2014. Our results indicate a threshold of re ∼ 13 μm for warm rain initiation in convective clouds, which is in agreement with previous studies. In clouds over the Atlantic Ocean, warm rain starts at smaller re, likely linked to the enhancement of coalescence of drops formed on giant cloud condensation nuclei. In cloud passes where precipitation starts as ice hydrometeors, the threshold of re is also shifted to values smaller than 13 μm when coalescence processes are suppressed and precipitating particles are formed by accretion. We found a statistically significant linear relationship between PWC and re for measurements at cloud tops, with a correlation coefficient of ∼ 0:94. The tight relationship between re and PWC was established only when particles with sizes large enough to precipitate (drizzle and raindrops) are included in calculating re. Our results emphasize for the first time that re is a key parameter to determine both initiation and amount of precipitation at the top of convective clouds. © Author(s) 2021.
语种	英语
scopus关键词	convective cloud; droplet; precipitable water; precipitation assessment; quantitative analysis; water content; Amazon Basin; Atlantic Ocean; Atlantic Ocean (Tropical)
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/246567
作者单位	Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, 55128, Germany; Institute of Earth Sciences, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel; Université Clermont Auvergne, CNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand, Clermont-Ferrand, 63000, France; Leipziger Institut für Meteorologie (LIM), Universität Leipzig, Stephanstr. 3, Leipzig, 04103, Germany; Scripps Institution of Oceanography, University of California San Diego, San diego, CA 92037, United States; Department of Geology and Geophysics, King Saud University, Riyadh, 11457, Saudi Arabia; Institute of Atmospheric Physics, German Aerospace Center (DLR), Oberpfaffenhofen, 82234, Germany; Institut für Physik der Atmosphäre, Johannes Gutenberg-Universität, Mainz, 55099, Germany; Department of Experimental Aerosol and Cloud Microphysics, Leibniz Institute for Tropospheric Research, Leipzig, 04318, Germany
推荐引用方式 GB/T 7714	Braga R.C.,Rosenfeld D.,Krüger O.O.,et al. Linear relationship between effective radius and precipitation water content near the top of convective clouds: measurement results from ACRIDICON-CHUVA campaign[J],2021,21(18).
APA	Braga R.C..,Rosenfeld D..,Krüger O.O..,Ervens B..,Holanda B.A..,...&Pöhlker M.L..(2021).Linear relationship between effective radius and precipitation water content near the top of convective clouds: measurement results from ACRIDICON-CHUVA campaign.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(18).
MLA	Braga R.C.,et al."Linear relationship between effective radius and precipitation water content near the top of convective clouds: measurement results from ACRIDICON-CHUVA campaign".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.18(2021).