冰地球上的浮动多少?- 江南体育网页版- - - - -地球科学堆江南电子竞技平台栈交换 最近30从www.hoelymoley.com 2023 - 07 - 07 - t20:11:31z //www.hoelymoley.com/feeds/question/7956 https://creativecommons.org/licenses/by-sa/4.0/rdf //www.hoelymoley.com/q/7956 5 冰地球上的浮动多少? jhch //www.hoelymoley.com/users/5942 2016 - 05 - 06 - t14:16:58z 2016 - 05 - 09 - t11:37:14z < p >浮动多少冰地球上(如冰山,或者所有的冰在北极)?< / p > //www.hoelymoley.com/questions/7956/-/7962 # 7962 0 答案由戈登斯坦格冰地球上的浮动多少? 戈登斯坦格 //www.hoelymoley.com/users/4507 2016 - 05 - 07 - t10:46:35z 2016 - 05 - 07 - t10:46:35z < p >南极陆地冰平均超过1.8公里厚。格陵兰岛冰层平均超过2公里厚一点。circum-Antarctic冰厚度平均厚度只有1 - 2米,而北极海冰(所有)1 - 5米厚变化——> 6米厚,但全球变暖已经变薄冰层在最近几十年。< / p > < p >在其最大的冬季区段的海冰的面积相当于大陆冰,所以全球浮冰的比例约为0.1%。如果你需要更准确的答复,那么我建议你拖网互联网区域区段,并做季节性的质量平衡。显然,它根据你选择哪个半球冬天会有所不同。我建议“北极海冰新闻”< a href = " https://nsidc.org/arcticseaicenews/ " rel =“nofollow”> https://nsidc.org/arcticseaicenews/ < / >作为一个很好的起点。< / p > //www.hoelymoley.com/questions/7956/-/7964 # 7964 7 答案由马特·霍尔冰地球上的浮动多少? 马特·霍尔 //www.hoelymoley.com/users/28050 2016 - 05 - 07 - t11:18:27z 2016 - 05 - 09 - t11:37:14z < p > <强>一阶估计约为5%。< /强> < / p > < p >这是一个棘手的问题比它首次出现,因为冰架。引用Kusky (2014): < / p > < blockquote > < p >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。< / p >

So they are floating, and they can be up to 2000 m thick, according to antacticglaciers.org. So they definitely make a substantial contribution to the world's sea ice fraction.

Continuing with Kusky:

Ice shelves are found in Antarctica, Greenland, and along the polar seacoasts of the Canadian Arctic Islands. The largest ice shelves are contained in Antarctica, which contains 91% of the world's glacial ice, around 7% of which is contained in ice shelves. These ice shelves cover 50% of the coast of Antarctica, forming an area 1/10th the size of the continent.

If you don't take ice shelves into account, and only think about pack ice, you end up with about 0%, because pack ice is generally thinner than about 4 m, and so makes up a tiny fraction of global ice volume, in spite of its extensive area.

But if you do account for ice shelves, especially the southern ones, 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.

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