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Study on Extreme Parameters of Drift Ice in the Northern Barents Sea

机译：北方小客人漂流冰极端参数研究

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This paper attempts to characterize the long-time extreme behaviors of drift ice in the northern Barents Sea from 1987 to 2016 using ice motion dataset from NSIDC and ice thickness datasets from NECP-CFSR and CFSv2. Three typical locations from west to east have been chosen for statistical analysis. Results show that the annual ice velocity extrema primarily ranges between 15 and 50 cms~(-1), with the simultaneous directions predominantly from W to SE. For first-year ice thickness, the annual thickness maxima approximately range from 90 to 170 cm, but with an obvious decreasing trend. Regarding the extreme parameters estimation, four fundamental extreme value distribution functions, namely, Gumbel, Weibull, generalized extreme value and Pearson type Ⅲ distributions are selected to obtain different return values of ice velocity and thickness. All functions have passed the K-S test but with different goodness of fit at the three sites. In particular, Gumbel distribution possesses higher extreme values at longer return periods. Furthermore, the patterns of co-occurrence distribution for concurrent ice velocity and ice thickness are calculated and analyzed.
机译：本文试图在1987年至2016年使用来自NECP-CFSR和CFSv2的NSIDC和冰厚度数据集的冰水运动数据集来表征北方小须在北方小客管中的漂移冰的长期极端行为。从西部到东部的三个典型地点已被选中用于统计分析。结果表明，年度冰速极值主要范围为15到50厘米〜（-1），主要从W到SE同时指示。对于一年的冰厚度，年厚度最大值约为90至170厘米，但趋势明显下降。关于极端参数估计，选择了四个基本的极值分布函数，即Gumbel，Weibull，广义极值和PearsonⅢ型分布，以获得冰速度和厚度的不同返回值。所有功能都通过了K-S测试，但在三个地点具有不同的优点。特别是，Gumbel分布在更长的返回期间具有更高的极值值。此外，计算并分析了同时冰速和冰厚的共发生分布的模式。

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