气候变化领域集成服务门户(CCPortal): How much snow falls on the Antarctic ice sheet?

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DOI	10.5194/tc-8-1577-2014
	How much snow falls on the Antarctic ice sheet?
	Palerme C.; Kay J.E.; Genthon C.; L'Ecuyer T.; Wood N.B.; Claud C.
发表日期	2014
ISSN	19940416
卷号	8 期号:4
英文摘要	Climate models predict Antarctic precipitation to increase during the 21st century, but their present day Antarctic precipitation differs. A model-independent climatology of the Antarctic precipitation characteristics, such as snowfall rates and frequency, is needed to assess the models, but it is not yet available. Satellite observations of precipitation by active sensors has been possible in the polar regions since the launch of CloudSat in 2006. Here, we use two CloudSat products to generate the first multi-year, model-independent climatology of Antarctic precipitation. The first product is used to determine the frequency and the phase of precipitation, while the second product is used to assess the snowfall rate. The mean snowfall rate from August 2006 to April 2011 is 171 mm yearĝ̂'1 over the Antarctic ice sheet, north of 82° S. While uncertainties on individual precipitation retrievals from CloudSat data are potentially large, the mean uncertainty should be much smaller, but cannot be easily estimated. There are no in situ measurements of Antarctic precipitation to directly assess the new climatology. However, distributions of both precipitation occurrences and rates generally agree with the European Centre for Medium-Range Weather Forecasts (ECMWF) ERA-Interim data set, the production of which is constrained by various in situ and satellite observations, but does not use any data from CloudSat. The new data set thus offers unprecedented capability to quantitatively assess Antarctic precipitation statistics and rates in climate models. © Author(s) 2014. CC Attribution 3.0 License.
学科领域	climate modeling; CloudSat; ice sheet; precipitation (climatology); satellite imagery; statistical analysis; weather forecasting; Antarctic Ice Sheet; Antarctica
语种	英语
scopus关键词	climate modeling; CloudSat; ice sheet; precipitation (climatology); satellite imagery; statistical analysis; weather forecasting; Antarctic Ice Sheet; Antarctica
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120065
作者单位	CNRS, LGGE, UMR5183, 38041 Grenoble, France; Univ. Grenoble Alpes, LGGE, UMR5183, 38041 Grenoble, France; NCAR CGD, National Center for Atmospheric Research Climate and Global Dynamics, Boulder, CO, United States; Department of Atmospheric and Oceanic Sciences, University of Wisconsin-Madison, Madison, WI, United States; Cooperative Institute for Meteorological Satellite Studies, University of Wisconsin-Madison, Madison, WI, United States; Laboratoire de Météorologie Dynamique/IPSL, CNRS, Ecole Polytechnique, Palaiseau, France
推荐引用方式 GB/T 7714	Palerme C.,Kay J.E.,Genthon C.,et al. How much snow falls on the Antarctic ice sheet?[J],2014,8(4).
APA	Palerme C.,Kay J.E.,Genthon C.,L'Ecuyer T.,Wood N.B.,&Claud C..(2014).How much snow falls on the Antarctic ice sheet?.Cryosphere,8(4).
MLA	Palerme C.,et al."How much snow falls on the Antarctic ice sheet?".Cryosphere 8.4(2014).