摘要
利用CryoSat-2卫星测高数据反演波弗特海的海冰厚度,并利用2010~2013年10月份仰视声呐(ULS)和2011年冰桥计划(IceBridge)数据对结果进行精度评估。结果表明,测高反演的海冰吃水深度与ULS吃水深度差值的最大值和标准差分别为14 cm和4 cm;测高反演的海冰厚度与冰桥计划海冰厚度差值的平均值和标准差分别为2.7 cm和65.7 cm,优于Laxon(2013)研究结果(分别优化2.1 cm和6.6 cm)。在此基础上,研究2011~2017年波弗特海夏冬两季的海冰厚度变化,发现二者具有类似的分布特征,且冬季3月海冰覆盖范围更广,厚度更大;进一步分析2011~2017年3月份冬季海冰厚度年际变化,发现其呈整体下降趋势,且2012年最小,2014年最大。
Using CryoSat-2 satellite altimetry data, the sea ice thickness in the Beaufort Sea is retrieved. The accuracy of the results is evaluated using the ULS data in October 2010 to 2013 and IceBridge data in 2011. The results show that the maximum and standard deviations of the difference between the sea ice draught depth and ULS draught depth are 14 cm and 4 cm, respectively. The average and standard deviations of the difference between the sea ice thickness and IceBridge sea ice thickness are 2.7 cm and 65.7 cm, respectively, which are better than Laxon’s(2013) research results. The results are optimized by 2.1 cm and 6.6 cm, respectively. On this basis, the variation of sea ice thickness in summer and winter of the Beaufort Sea from 2011 to 2017 is studied. The sea ice thickness in summer and winter has similar distribution characteristics, and the coverage in March of winter is wider and thicker. The interannual variation of sea ice thickness in March of winter of 2011 to 2017 is further analyzed. The results show that the sea ice thickness in 2011 to 2017 shows an overall downward trend, with the smallest in 2012 and the largest in 2014.
作者
刘生元
李斐
杨元德
LIU Shengyuan;LI Fei;YANG Yuande(China Antarctic Surveying and Mapping Research Center,Wuhan University,129 Luoyu Road,Wuhan 430079,China)
出处
《大地测量与地球动力学》
CSCD
北大核心
2019年第12期1310-1316,共7页
Journal of Geodesy and Geodynamics
基金
国家自然科学基金(41476163,41531069)~~
