气候变化领域集成服务门户(CCPortal): Simultaneous estimation of wintertime sea ice thickness and snow depth from space-borne freeboard measurements

CCPortal

DOI	10.5194/tc-14-3761-2020
	Simultaneous estimation of wintertime sea ice thickness and snow depth from space-borne freeboard measurements
	Shi H.; Sohn B.-J.; Dybkjær G.; Tage Tonboe R.; Lee S.-M.
发表日期	2020
ISSN	19940416
起始页码	3761
结束页码	3783
卷号	14 期号:11
英文摘要	A method of simultaneously estimating snow depth and sea ice thickness using satellite-based freeboard measurements over the Arctic Ocean during winter was proposed. The ratio of snow depth to ice thickness (referred to as ) was defined and used in constraining the conversion from the freeboard to ice thickness in satellite altimetry without prior knowledge of snow depth. Then was empirically determined using the ratio of temperature difference of the snow layer to the difference of the ice layer to allow the determination of from satellite-derived snow surface temperature and snow-ice interface temperature. The proposed method was evaluated against NASA's Operation IceBridge measurements, and results indicated that the algorithm adequately retrieves snow depth and ice thickness simultaneously; retrieved ice thickness was found to be better than the methods relying on the use of snow depth climatology as input in terms of mean bias. The application of the proposed method to CryoSat-2 radar freeboard measurements yields similar results. In conclusion, the developed -based method has the capacity to derive ice thickness and snow depth without relying on the snow depth information as input for the buoyancy equation or the radar penetration correction for converting freeboard to ice thickness. © Author(s) 2020. This work is distributed under the Creative Commons Attribution 4.0 License.
英文关键词	algorithm; CryoSat; ice thickness; satellite altimetry; sea ice; sea level change; snow cover; winter; Arctic Ocean
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/202208
作者单位	School of Earth and Environmental Sciences, Seoul National University, Seoul, South Korea; Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, School of Atmospheric Physics, Nanjing University of Information Science and Technology, Nanjing, China; Danish Meteorological Institute, Copenhagen, Denmark; Center for Environmental Technology, Ecee, University of Colorado-Boulder, Boulder, CO, United States; National Snow and Ice Data Center, Cires, University of Colorado-Boulder, Boulder, CO, United States
推荐引用方式 GB/T 7714	Shi H.,Sohn B.-J.,Dybkjær G.,et al. Simultaneous estimation of wintertime sea ice thickness and snow depth from space-borne freeboard measurements[J],2020,14(11).
APA	Shi H.,Sohn B.-J.,Dybkjær G.,Tage Tonboe R.,&Lee S.-M..(2020).Simultaneous estimation of wintertime sea ice thickness and snow depth from space-borne freeboard measurements.Cryosphere,14(11).
MLA	Shi H.,et al."Simultaneous estimation of wintertime sea ice thickness and snow depth from space-borne freeboard measurements".Cryosphere 14.11(2020).