气候变化领域集成服务门户(CCPortal): Arctic snowfall from CloudSat observations and reanalyses

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DOI	10.1175/JCLI-D-19-0105.1
	Arctic snowfall from CloudSat observations and reanalyses
	Edel L.; Claud C.; Genthon C.; Palerme C.; Wood N.; L’Ecuyer T.; Bromwich D.
发表日期	2020
ISSN	0894-8755
起始页码	2093
结束页码	2109
卷号	33 期号:6
英文摘要	While snowfall makes a major contribution to the hydrological cycle in the Arctic, state-of-the-art climatologies still significantly disagree. We present a satellite-based characterization of snowfall in the Arctic using CloudSat observations, and compare it with various other climatologies. First, we examine the frequency and phase of precipitation as well as the snowfall rates from CloudSat over 2007–10. Frequency of solid precipitation is higher than 70% over the Arctic Ocean and 95% over Greenland, while mixed precipitation occurs mainly over North Atlantic (50%) and liquid precipitation over land south of 708N (40%). Intense mean snowfall rates are located over Greenland, the Barents Sea, and the Alaska range (.500 mm yr21), and maxima are located over the southeast coast of Greenland (up to 2000 mm yr21). Then we compare snowfall rates with the European Centre for Medium-Range Weather Forecasts (ECMWF) interim reanalysis (ERA-Interim, herein ERA-I) and Arctic System Reanalysis (ASR). Similar general geographical patterns are observed in all datasets, such as the high snowfall rates along the North Atlantic storm track. Yet, there are significant mean snowfall rate differences over the Arctic between 588 and 828N between ERA-I (153 mm yr21), ASR version 1 (206 mm yr21), ASR version 2 (174 mm yr21), and CloudSat (183 mm yr21). Snowfall rates and differences are larger over Greenland. Phase attribution is likely to be a significant source of snowfall rate differences, especially regarding ERA-I underestimation. In spite of its nadir-viewing limitations, CloudSat is an essential source of information to characterize snowfall in the Arctic. © 2020 American Meteorological Society.
英文关键词	Climatology; Clouds; Weather forecasting; Arctic ocean; Arctic system reanalysis; European centre for medium-range weather forecasts; Geographical patterns; Hydrological cycles; North Atlantic; Solid precipitation; State of the art; Snow
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171408
作者单位	LMD/IPSL, Ecole Polytechnique, IP Paris, ENS, PSL research University, Sorbonne University, CNRS, Palaiseau, France; Development Centre for Weather Forecasting, Norwegian Meteorological Institute, Oslo, Norway; Department of Atmospheric and Oceanic Sciences, University of Wisconsin–Madison, Madison, WI, United States; Polar Meteorology Group, Byrd Polar, and Climate Research Center, Ohio State University, Columbus, OH, United States
推荐引用方式 GB/T 7714	Edel L.,Claud C.,Genthon C.,et al. Arctic snowfall from CloudSat observations and reanalyses[J],2020,33(6).
APA	Edel L..,Claud C..,Genthon C..,Palerme C..,Wood N..,...&Bromwich D..(2020).Arctic snowfall from CloudSat observations and reanalyses.Journal of Climate,33(6).
MLA	Edel L.,et al."Arctic snowfall from CloudSat observations and reanalyses".Journal of Climate 33.6(2020).