globalchange  > 气候变化与战略
DOI: 10.5194/tc-14-3761-2020
论文题名:
Simultaneous estimation of wintertime sea ice thickness and snow depth from space-borne freeboard measurements
作者: Shi H.; Sohn B.-J.; Dybkjær G.; Tage Tonboe R.; Lee S.-M.
刊名: Cryosphere
ISSN: 19940416
出版年: 2020
卷: 14, 期:11
起始页码: 3761
结束页码: 3783
语种: 英语
英文关键词: algorithm ; CryoSat ; ice thickness ; satellite altimetry ; sea ice ; sea level change ; snow cover ; winter ; Arctic Ocean
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.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164586
Appears in Collections:气候变化与战略

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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

Recommended Citation:
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]. Cryosphere,2020-01-01,14(11)
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