气候变化领域集成服务门户(CCPortal): Estimating snow depth over Arctic sea ice from calibrated dual-frequency radar freeboards

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DOI	10.5194/tc-12-3551-2018
	Estimating snow depth over Arctic sea ice from calibrated dual-frequency radar freeboards
	Lawrence I.R.; Tsamados M.C.; Stroeve J.C.; Armitage T.W.K.; Ridout A.L.
发表日期	2018
ISSN	19940416
卷号	12 期号:11
英文摘要	Snow depth on sea ice remains one of the largest uncertainties in sea ice thickness retrievals from satellite altimetry. Here we outline an approach for deriving snow depth that can be applied to any coincident freeboard measurements after calibration with independent observations of snow and ice freeboard. Freeboard estimates from CryoSat-2 (Ku band) and AltiKa (Ka band) are calibrated against data from NASA's Operation IceBridge (OIB) to align AltiKa with the snow surface and CryoSat-2 with the ice-snow interface. Snow depth is found as the difference between the two calibrated freeboards, with a correction added for the slower speed of light propagation through snow. We perform an initial evaluation of our derived snow depth product against OIB snow depth data by excluding successive years of OIB data from the analysis. We find a root-mean-square deviation of 7.7, 5.3, 5.9, and 6.7 cm between our snow thickness product and OIB data from the springs of 2013, 2014, 2015, and 2016 respectively. We further demonstrate the applicability of the method to ICESat and Envisat, offering promising potential for the application to CryoSat-2 and ICESat-2, which launched in September 2018. © 2018 Author(s).
学科领域	calibration; CryoSat; Envisat; estimation method; ice thickness; ICESat; ocean island basalt; radar; satellite altimetry; sea ice; snow cover; Arctic Ocean
语种	英语
scopus关键词	calibration; CryoSat; Envisat; estimation method; ice thickness; ICESat; ocean island basalt; radar; satellite altimetry; sea ice; snow cover; Arctic Ocean
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/119035
作者单位	Centre for Polar Observation and Modelling, Earth Sciences, University College London, London, United Kingdom; National Snow and Ice Data Center, University of Colorado, Boulder, CO, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States
推荐引用方式 GB/T 7714	Lawrence I.R.,Tsamados M.C.,Stroeve J.C.,et al. Estimating snow depth over Arctic sea ice from calibrated dual-frequency radar freeboards[J],2018,12(11).
APA	Lawrence I.R.,Tsamados M.C.,Stroeve J.C.,Armitage T.W.K.,&Ridout A.L..(2018).Estimating snow depth over Arctic sea ice from calibrated dual-frequency radar freeboards.Cryosphere,12(11).
MLA	Lawrence I.R.,et al."Estimating snow depth over Arctic sea ice from calibrated dual-frequency radar freeboards".Cryosphere 12.11(2018).