* *一阶估计约为5%。* *这是一个棘手的问题比它首次出现,因为冰架。引用Kusky(2014): >冰盖冰架形式移动在海水和形成一个厚片冰漂浮在水面上,附着在土地上,两个,三个。他们向海的双方通常伴随着一个陡峭的悬崖高达1500英尺(500米)高,许多冰川崩解形成冰山。所以它们是漂浮,它们可以厚达2000米,根据[antacticglaciers.org] [1]。所以他们肯定做出实质性贡献世界海冰的分数。继续Kusky: >南极冰架在格陵兰岛和加拿大北极的极地海滩岛屿。最大的南极冰架包含,其中包含世界上91%的冰川冰,这是包含在冰架的7%左右。这些冰架覆盖50%的南极洲海岸,形成一个区域为欧洲大陆的大小。如果你不考虑冰架,且仅考虑浮冰,你最终得到的约0%,因为[浮冰][2]通常比约4米薄,所以占全球冰量的一小部分,尽管广泛的区域。 But if you do account for ice shelves, especially [the southern ones][3], the answer must be much greater. I have not done the research to find the numbers, but the text I quoted suggests something less than 7%, so I'm going with 5% as a first-order, round-number guess. **Reference** Kusky, T M (2014), Encyclopedia of Earth Science, New York Academy of Sciences, 529 pp. [In Google Books.](https://books.google.ca/books?id=p1Bs03rhZzwC&lpg=PA359&ots=-bg67Yned2&pg=PA359#v=onepage&q&f=false) [1]: http://www.antarcticglaciers.org/glaciers-and-climate/shrinking-ice-shelves/ice-shelves/ [2]: https://en.wikipedia.org/wiki/Arctic_ice_pack [3]: https://en.wikipedia.org/wiki/List_of_Antarctic_ice_shelves