Measured properties of the Antarctic ice sheet derived from the SCAR Antarctic digital database
Measured properties of the Antarctic ice sheet derived from the SCAR Antarctic digital database
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DOI：
10.1017/s0032247400024268
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发表时间：
1994-07
期刊：
影响因子：
0.8
通讯作者：
A. Fox;A. Paul;R. Cooper
中科院分区：
文献类型：
--
作者：
A. Fox;A. Paul;R. Cooper
SCAR南极数字数据库（ADD）的建成为南极洲的统计计算提供了新的基础：数据集可以按原始资料的尺度进行，并推广为1:10,000,000,1:30,000,000和1:30,000,000。新的描述性统计数据基于ADD 1:10 000数据集，因为这是源图提供海岸线和无冰区完整覆盖的最大比例尺。统计包括海岸线类型的总长度和比例，以及南极洲的总面积及其组成地物类型的比例。罗斯冰架和费尔奇纳-罗恩冰架的面积也被计算出来了。虽然与以往的研究相比，南极洲的总面积保持不变，但海岸线类型和构成特征类型在总面积中的相对比例发生了重大变化。特别是，计算出的无冰地面面积仅约为以前经常引用的研究面积的七分之一。报告的变化来自改进的制图、数据的重新解释和海岸线的实际变化。
Abstract The completion of the SCAR Antarctic digital database (ADD) has provided a new basis for statistical calculations for Antarctica: data-sets are available at the scale of the original source material, and generalised to 1:1,000,000, 1:3,000,000, 1:10,000,000, and 1:30,000,000. The new descriptive statistics presented are based on the ADD 1:1,000,000 data-set since this is the largest scale at which source maps provided complete cover of the coastline and ice-free areas. The statistics include the total length and proportions of coastline types and the total area of Antarctica with the proportions of its constituent feature types. The areas of the Ross and Filchner-Ronne ice shelves have also been computed. Whilst the total area of Antarctica has remained static compared with previous studies, the relative proportions of coastline types and constituent feature types within the total area show significant changes. In particular the calculated area of ice-free ground is only approximately one-seventh of that often quoted from previous studies. The changes reported result from improved mapping, reinterpretation of data, and actual changes of coastline.