Thickness distribution of Antarctic sea ice
Thickness distribution of Antarctic sea ice
复制标题
DOI：
10.1029/2007jc004254
复制
发表时间：
2008-05
影响因子：
--
通讯作者：
A. Worby;C. Geiger;M. Paget;M. V. Woert;S. Ackley;T. Deliberty
中科院分区：
文献类型：
--
作者：
A. Worby;C. Geiger;M. Paget;M. V. Woert;S. Ackley;T. Deliberty
[1]船基观测用于描述南极洲周围海冰和雪盖厚度分布和特征的区域和季节变化。该数据集包括在20多年的活动中收集的23,373个观测数据，并已作为南极研究科学委员会(SCAR)南极海冰过程和气候(Aspect)计划的一部分进行汇编。结果显示了大陆周围六个区域冰厚度分布的季节变化，以及每个区域和季节的平均厚度、表面隆起、积雪和局地变率的统计数据。一个简单的山脊模式被用来根据水平冰和地表地形的观测来计算总冰层厚度，以提供包括脊状成分在内的总冰量的最佳估计。海冰总厚度(包括脊线)的长期平均值和标准差为0.87±0.91m，比平均水平冰厚度0.62m大40%。对南北断面和东西断面结构函数的分析表明，海冰厚度去相关的滞后距离约为100-300公里，我们以此为基础在2.5�5.0网格上绘制近连续的海冰和积雪厚度图。
[1] Ship-based observations are used to describe regional and seasonal changes in the thickness distribution and characteristics of sea ice and snow cover thickness around Antarctica. The data set comprises 23,373 observations collected over more than 2 decades of activity and has been compiled as part of the Scientific Committee on Antarctic Research (SCAR) Antarctic Sea Ice Processes and Climate (ASPeCt) program. The results show the seasonal progression of the ice thickness distribution for six regions around the continent together with statistics on the mean thickness, surface ridging, snow cover, and local variability for each region and season. A simple ridge model is used to calculate the total ice thickness from the observations of level ice and surface topography, to provide a best estimate of the total ice mass, including the ridged component. The long-term mean and standard deviation of total sea ice thickness (including ridges) is reported as 0.87 ± 0.91 m, which is 40% greater than the mean level ice thickness of 0.62 m. Analysis of the structure function along north/south and east/west transects revealed lag distances over which sea ice thickness decorrelates to be of the order of 100–300 km, which we use as a basis for presenting near-continuous maps of sea ice and snow cover thickness plotted on a 2.5 � 5.0 grid.