气候变化领域集成服务门户(CCPortal): Brief communication: Conventional assumptions involving the speed of radar waves in snow introduce systematic underestimates to sea ice thickness and seasonal growth rate estimates

CCPortal

DOI	10.5194/tc-14-251-2020
	Brief communication: Conventional assumptions involving the speed of radar waves in snow introduce systematic underestimates to sea ice thickness and seasonal growth rate estimates
	Mallett R.D.C.; Lawrence I.R.; Stroeve J.C.; Landy J.C.; Tsamados M.
发表日期	2020
ISSN	19940416
起始页码	251
结束页码	260
卷号	14 期号:1
英文摘要	Pan-Arctic sea ice thickness has been monitored over recent decades by satellite radar altimeters such as CryoSat-2, which emits Ku-band radar waves that are assumed in publicly available sea ice thickness products to penetrate overlying snow and scatter from the ice-snow interface. Here we examine two expressions for the time delay caused by slower radar wave propagation through the snow layer and related assumptions concerning the time evolution of overlying snow density. Two conventional treatments introduce systematic underestimates of up to 15 cm into ice thickness estimates and up to 10 cm into thermodynamic growth rate estimates over multi-year ice in winter. Correcting these biases would impact a wide variety of model projections, calibrations, validations and reanalyses. © 2020 Author(s).
英文关键词	calibration; CryoSat; estimation method; ice thickness; model validation; radar; satellite altimetry; scattering; sea ice; snow; wave propagation; wave velocity; Arctic
语种	英语
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/202151
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; Centre for Earth Observation Science, University of Manitoba, Winnipeg, MB, Canada; School of Geographical Sciences, University of Bristol, Bristol, United Kingdom
推荐引用方式 GB/T 7714	Mallett R.D.C.,Lawrence I.R.,Stroeve J.C.,et al. Brief communication: Conventional assumptions involving the speed of radar waves in snow introduce systematic underestimates to sea ice thickness and seasonal growth rate estimates[J],2020,14(1).
APA	Mallett R.D.C.,Lawrence I.R.,Stroeve J.C.,Landy J.C.,&Tsamados M..(2020).Brief communication: Conventional assumptions involving the speed of radar waves in snow introduce systematic underestimates to sea ice thickness and seasonal growth rate estimates.Cryosphere,14(1).
MLA	Mallett R.D.C.,et al."Brief communication: Conventional assumptions involving the speed of radar waves in snow introduce systematic underestimates to sea ice thickness and seasonal growth rate estimates".Cryosphere 14.1(2020).