气候变化领域集成服务门户(CCPortal): Evaluation of the CloudSat surface snowfall product over Antarctica using ground-based precipitation radars

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DOI	10.5194/tc-12-3775-2018
	Evaluation of the CloudSat surface snowfall product over Antarctica using ground-based precipitation radars
	Souverijns N.; Gossart A.; Lhermitte S.; Gorodetskaya I.V.; Grazioli J.; Berne A.; Duran-Alarcon C.; Boudevillain B.; Genthon C.; Scarchilli C.; Van Lipzig N.P.M.
发表日期	2018
ISSN	19940416
卷号	12 期号:12
英文摘要	In situ observations of snowfall over the Antarctic Ice Sheet are scarce. Currently, continent-wide assessments of snowfall are limited to information from the Cloud Profiling Radar on board the CloudSat satellite, which has not been evaluated up to now. In this study, snowfall derived from CloudSat is evaluated using three ground-based vertically profiling 24 GHz precipitation radars (Micro Rain Radars: MRRs). Firstly, using the MRR long-term measurement records, an assessment of the uncertainty caused by the low temporal sampling rate of CloudSat (one revisit per 2.1 to 4.5 days) is performed. The 10-90th-percentile temporal sampling uncertainty in the snowfall climatology varies between 30% and 40% depending on the latitudinal location and revisit time of CloudSat. Secondly, an evaluation of the snowfall climatology indicates that the CloudSat product, derived at a resolution of 1° latitude by 2° longitude, is able to accurately represent the snowfall climatology at the three MRR sites (biases<15 %), outperforming ERA-Interim. For coarser and finer resolutions, the performance drops as a result of higher omission errors by CloudSat. Moreover, the CloudSat product does not perform well in simulating individual snowfall events. Since the difference between the MRRs and the CloudSat climatology are limited and the temporal uncertainty is lower than current Climate Model Intercomparison Project Phase 5 (CMIP5) snowfall variability, our results imply that the CloudSat product is valuable for climate model evaluation purposes. © 2018 Author(s).
学科领域	climate modeling; climatology; CloudSat; CMIP; precipitation (climatology); radar; snow cover; Antarctic Ice Sheet; Antarctica
语种	英语
scopus关键词	climate modeling; climatology; CloudSat; CMIP; precipitation (climatology); radar; snow cover; 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/119019
作者单位	Department of Earth and Environmental Sciences, KU Leuven, Leuven, Belgium; Department of Geoscience and Remote Sensing, Delft University of Technology, Delft, Netherlands; CESAM-Centre for Environmental and Marine Studies, Department of Physics, University of Aveiro, Aveiro, Portugal; Environmental Remote Sensing Laboratory, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland; Federal Office of Meteorology and Climatology, MeteoSwiss, Locarno-Monti, Switzerland; Université Grenoble Alpes, CNRS, IRD, Grenoble INP, IGE, Grenoble, France; Technical Unit for Energy and Environmental Modeling UTMEA, ENEA, Rome, Italy
推荐引用方式 GB/T 7714	Souverijns N.,Gossart A.,Lhermitte S.,et al. Evaluation of the CloudSat surface snowfall product over Antarctica using ground-based precipitation radars[J],2018,12(12).
APA	Souverijns N..,Gossart A..,Lhermitte S..,Gorodetskaya I.V..,Grazioli J..,...&Van Lipzig N.P.M..(2018).Evaluation of the CloudSat surface snowfall product over Antarctica using ground-based precipitation radars.Cryosphere,12(12).
MLA	Souverijns N.,et al."Evaluation of the CloudSat surface snowfall product over Antarctica using ground-based precipitation radars".Cryosphere 12.12(2018).