Basal melting and freezing under the Amery Ice Shelf, East Antarctica
Basal melting and freezing under the Amery Ice Shelf, East Antarctica
复制标题
东南极洲阿默里冰架下的基底融化和冻结
DOI:
10.3189/002214310791190820
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发表时间:
2010-04
影响因子:
3.4
通讯作者:
Weili WANG
中科院分区:
文献类型:
--
作者:
K.C. JEZEK;Yafeng WANG;Jia Hong Wen;I. ALLISON;Hongxing LIU;Weili WANG
Abstract The basal melting and freezing rates under the Amery Ice Shelf, East Antarctica, are evaluated, and their spatial distributions mapped. Ice velocity, surface elevation and accumulation rate datasets are employed in the analysis, along with a column-averaged ice density model. Our analysis shows that the total area of basal melting is 34 700 km2, with a total annual melt of 62.5 ± 9.3 Gt and an average melting rate of 1.8 ± 0.3 m a−1. Basal freezing mainly occurs in the northwestern part of the ice shelf, over a total area of 26 100 km2 and with a maximum freezing rate of 2.4 ± 0.4 m a−1. The total marine ice that accretes to the ice-shelf base is estimated to be 16.2 ± 2.4 Gt a−1. Using a redefined grounding line and geometry of the Amery Ice Shelf, we estimate the net melt over the ice-shelf base is about 46.4 ± 6.9 G ta−1, which is higher than previous modeling and oceanographic estimates. Net basal melting accounts for about half of the total ice-shelf mass loss, with the rest being from iceberg discharge. Our basal melting and freezing distribution map provides a scientific basis for quantitative analysis of ice–ocean interaction at the ice-shelf–ocean interface.
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DOI:
10.1016/0306-4522(96)00348-x
发表时间:
1893-10
期刊:
The Indian Medical Gazette
影响因子:
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作者:
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通讯作者:
M. M. Syddiq-M.
影响因子:
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DOI:
10.1029/2008jf001094
发表时间:
2009-03
期刊:
--
影响因子:
--
作者:
M. King;R. Coleman;H. Fricker;B. Galton-Fenzi;B. Legrésy;L. Padman;R. Warner
通讯作者:
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影响因子:
2.9
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W. Budd;M. Corry;T. H. Jacka
影响因子:
5.2
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E. Rignot;G. Casassa;P. Gogineni;W. Krabill;A. Rivera;R. Thomas