Holocene stability of the Amundsen-Weddell ice divide, West Antarctica
Holocene stability of the Amundsen-Weddell ice divide, West Antarctica
复制标题
南极洲西部阿蒙森-威德尔冰分水岭的全新世稳定性
作者:
Ross N
We analyze Holocene ice flow using global positioning system and radio-echo sounding data acquired near the Amundsen-Weddell ice divide, between Pine Island Glacier and the Institute Ice Stream, West Antarctica. The data show that this part of the West Antarctic Ice Sheet (WAIS) has maintained a stable ice flow regime and ice divide position for ∼7000 yr. Independent glacial geological data, in support of this assertion, suggest that the interior of the WAIS west of the Ellsworth Mountains has thinned by only a few hundred meters since the Last Glacial Maximum (LGM) and that the position of the ice divide may be recurrent over longer (more than 20 k.y., perhaps pre-Quaternary) time scales. We suggest that basal topography constrains ice flow in this sector of the WAIS, making the ice divide relatively insensitive to perturbations around the margins of the ice sheet compared with other ice divides. Large-scale forcing measured elsewhere in the WAIS as major reorganizations of the ice sheet surface and flowline pattern may be manifested only in simple vertical changes of the Amundsen-Weddell interior.
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影响因子:
4
作者:
Lowe, AL;Anderson, JB
通讯作者:
Anderson, JB
DOI:
10.1130/mem170-p403
发表时间:
1992
期刊:
Geological Society of America Memoirs
影响因子:
--
作者:
G. Denton;J. Bockheim;R. Rutford;B. G. Andersen
通讯作者:
B. G. Andersen
影响因子:
5.2
作者:
J. Woodward;A. Smith;N. Ross;M. Thoma;H. Corr;E. King;Matt A. King;K. Grosfeld;M. Tranter;M. Siegert
通讯作者:
J. Woodward;A. Smith;N. Ross;M. Thoma;H. Corr;E. King;Matt A. King;K. Grosfeld;M. Tranter;M. Siegert
影响因子:
5.8
作者:
E. Waddington;H. Conway;E. Steig;R. Alley;E. Brook;K. Taylor;J. White
通讯作者:
J. White
影响因子:
5.2
作者:
H. Conway;L. A. Rasmussen
通讯作者:
H. Conway;L. A. Rasmussen