DOI: 10.5194/tc-8-1577-2014
Scopus记录号: 2-s2.0-84913554901
论文题名: How much snow falls on the Antarctic ice sheet?
作者: Palerme C ; , Kay J ; E ; , Genthon C ; , L'Ecuyer T ; , Wood N ; B ; , Claud C
刊名: Cryosphere
ISSN: 19940416
出版年: 2014
卷: 8, 期: 4 起始页码: 1577
结束页码: 1587
语种: 英语
英文关键词: climate modeling
; CloudSat
; ice sheet
; precipitation (climatology)
; satellite imagery
; statistical analysis
; weather forecasting
; Antarctic Ice Sheet
; Antarctica
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/74800
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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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
Recommended Citation:
Palerme C,, Kay J,E,et al. How much snow falls on the Antarctic ice sheet?[J]. Cryosphere,2014-01-01,8(4)