Significant Ice Retreat in the Region Patagonia - Antarctic Peninsula Oberved by ERS SAR
Significant Ice Retreat in the Region Patagonia - Antarctic Peninsula Oberved by ERS SAR
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ERS SAR 观测到南极半岛巴塔哥尼亚地区出现明显的冰退缩
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
M. Stuefer
中科院分区：
文献类型：
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作者：
H. Rott;P. Skvarca;W. Rack;M. Stuefer
根据 ERS-1 和 ERS-2 SAR 数据以及实地工作，对南极半岛南部巴塔哥尼亚冰原 (SPI) 和北部拉森冰架 (LIS) 冰川的面积变化和流动动力学进行了调查。经过一段时期的稳定退缩后，与过去 50 年的区域大气变暖相一致，LIS 最北端的两个部分（南纬 65°以北）在 1995 年初的几天内解体。同时，LIS 最北的两个部分（南纬 65°以北）也发生了大规模的崩解事件。最近对冰锋和裂谷带的观察表明，该部分的后退可能在不久的将来加速。对 SPI 东侧（南纬 48.3° 至 51.5°）主要出口冰川的研究表明，大多数冰川都出现了显着的退缩。作为一个例子，显示了乌普萨拉冰川崩解成阿根廷湖的面积变化。 1993 年之后，退却速度显着加快，导致异常大规模的产犊事件。巴塔哥尼亚-南极半岛地区位于西风带，气候梯度陡峭，因此对气候变化特别敏感，冰川和冰架的退缩表明。
Areal changes and flow dynamics of glaciers of the Southern Patagonian Icefield (SPI) and of northern Larsen Ice Shelf (LIS) on the Antarctic Peninsula have been investigated based on ERS-1 and ERS-2 SAR data and on field work. After a period of steady retreat, coinciding with regional atmospheric warming during the last five decades, the two northernmost sections of the LIS (north of 65°S) disintegrated within a few days in early 1995. At the same time a large calving event occurred also in the section of the LIS south of 65°S. Recent observations of the ice front and of rifting zones indicate that the retreat of this section might accelerate in the near future. Studies of major outlet glaciers on the east side of the SPI, which extends from 48.3°S to 51.5°S, revealed significant retreat for the majority of glaciers. As an example, areal changes of Upsala Glacier, calving into Lago Argentino, are shown. The retreat accelerated considerably after 1993 resulting in unusually large calving events. The region Patagonia - Antarctic Peninsula, located in the west wind zone, reveals steep climatic gradients and therefore is particularly sensitive to climate change as indicated by the retreat of glaciers and ice shelves.