气候变化领域集成服务门户(CCPortal): Ice in Southern Ocean Clouds With Cloud Top Temperatures Exceeding −5°C

CCPortal

DOI	10.1029/2021JD034574
	Ice in Southern Ocean Clouds With Cloud Top Temperatures Exceeding −5°C
	Zaremba T.J.; Rauber R.M.; McFarquhar G.M.; DeMott P.J.; D’Alessandro J.J.; Wu W.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:14
英文摘要	This study documents the presence of ice in stratocumulus clouds with cloud top temperatures (CTT) > −5 °C in the cold sector of extratropical cyclones over the Southern Ocean (SO) during ten SO Clouds, Radiation, Aerosol Transport Experimental Study (SOCRATES) research flights. Case studies are presented showing ice signatures within clouds when CTT were between −2 and −5°C, evidenced in Doppler radar radial velocity changes observed during high-altitude flight legs as ice particles melted across the 0°C isotherm. Ice on these legs was found to contribute to precipitation 3.8% of the time from clouds with −5°C < CTT <0°C. Clouds observed with a distinct melting level on high-altitude flight legs overall had greater cloud depths, tops with higher reflectivities, and higher linear depolarization ratios, compared to clouds without a melting level. In situ flight legs were also analyzed when Himawari-8 CTT were between 0 and −5°C and the aircraft was sampling in cloud within that temperature range. It was found that 3% of clouds sampled in situ with −5°C < CTT <0°C were mixed phase with a mean number concentration of 2.35 L−1 for nonspherical particles with maximum diameters >100 μm and 1.13 L−1 for nonspherical particles with maximum diameters >200 μm. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	clouds; ice formation; Southern Ocean
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/237120
作者单位	Department of Atmospheric Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States; Cooperative Institute for Mesoscale and Microscale Studies, University of Oklahoma, Norman, OK, United States; School of Meteorology, University of Oklahoma, Norman, OK, United States; Department of Atmospheric Science, Colorado State University, Fort Collins, CO, United States
推荐引用方式 GB/T 7714	Zaremba T.J.,Rauber R.M.,McFarquhar G.M.,et al. Ice in Southern Ocean Clouds With Cloud Top Temperatures Exceeding −5°C[J],2021,126(14).
APA	Zaremba T.J.,Rauber R.M.,McFarquhar G.M.,DeMott P.J.,D’Alessandro J.J.,&Wu W..(2021).Ice in Southern Ocean Clouds With Cloud Top Temperatures Exceeding −5°C.Journal of Geophysical Research: Atmospheres,126(14).
MLA	Zaremba T.J.,et al."Ice in Southern Ocean Clouds With Cloud Top Temperatures Exceeding −5°C".Journal of Geophysical Research: Atmospheres 126.14(2021).