A new Arctic MSS model derived from combined Cryosat-2 and ICESat observations

查看全文 作　　者：Guodong [1]Chen;Zhijie [1]Zhang;Stine Kildegaard [2]Rose;Ole Baltazar [2]Andersen;Shengjun [3]Zhang;Taoyong [4]Jin 机构地区：[1]School of Geography Science and Geomatics Engineering,Suzhou University of Science and Technology,Suzhou,People’s Republic of China;[2]National Space Institute,Technical University of Denmark,Kongens Lyngby,Denmark;[3]School of Resources and Civil Engineering,Northeastern University,Shenyang,China;[4]School of Geodesy and Geomatics,Wuhan University,Wuhan,People’s Republic of China 出　　处：《International Journal of Digital Earth》索引2022年第15卷第1期,共21页 基　　金：supported by the National Natural Science Foundation of China[grant numbers 421932511 and 41804002];the Open Research Foundation of the Key Laboratory of Geospace Environment and Geodesy,the Ministry of Education,Wuhan University[grant number 19-01-04];the Special Fund of Hubei Luojia Laboratory[grant number 220100003]. 摘　　要：Due to the existence of seasonal or perennial sea ice cover,the determination of the Arctic sea surface is more difficult than that of mid-low latitudinal oceans.Focusing on the sea surface height in the ice-covered region,this paper constructs a new Arctic mean sea surface(MSS)model,named SUST22,by combining the measurements from ICESat and Cryosat-2 missions.The lead detection methods of ICESat and Cryosat-2 are first studied and modified to acquire sea surface measurements with better accuracy.The results have shown that the standard deviation of Cryosat-2-derived Arctic sea surface height is about 3–4 cm in 10-km resolution grids,while the value of ICESat is 5–6 cm.Then the MSS construction procedure is discussed and the SUST22 MSS model is constructed.The new model is compared with the other four Arctic MSS models.The best agreement is found between SUST22 and DTU21 with an average difference of−4.0±5.2 cm.These models are also validated by ICESat-2 samples.The average difference between ICESat-2 and SUST22 is 15.8±7.4 cm,which shows that the new model SUST22 presents better consistency with the ICESat-2 than any of the other models. 关 键 词：ARCTIC ICESAT Cryosat-2 MSS lead detection