Historical t1uctuations of calving glaciers in South and West Greenland
Historical t1uctuations of calving glaciers in South and West Greenland
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格陵兰岛南部和西部冰川崩解的历史波动
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发表时间：
2020
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影响因子：
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通讯作者：
A. Weidick
中科院分区：
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作者：
A. Weidick
格陵兰南部Julianehåb冰帽和其他冰川产钙流量以及格陵兰南部和西部In 1和In 2冰帽产钙流量在60° ~ 73°N之间的变化。公元1850年到现在的时间进行审查。季节变化的快速运行的冰川（冰流）可能掩盖10 ng长期趋势，但在一般情况下，得出的结论是，活动模式（前进或后退）几乎是同步的出口和他们的邻近的1and-based段，而幅度不同，地形控制是重要的短期波动，但不应过分强调。1990年前后是一个扩展的准备期，观测到的行为模式符合Huybrechts的冰盖动态模型。该模型表明，冰盖一般是扩大作为气候冷却的结果，因为全新世气候最佳，但也定位与目前的冰缘变薄的地区。
Fluctuations of ca1f-ice producing out1ets of the Julianehåb ice cap and other loca1 glaciers in South Greenland, and oudets of the In1and Ice in South and West Greenland between 1atitudes 60° and 73°N from c. A.D. 1850 to the present time are reviewed. Seasona1 variations of the fast running tidewater glaciers (ice streams) may veil10ng term trends, but in general it is concluded that the mode of activity (advance or retreat) is nearly synchronous for the outlets and their neighbouring 1and-based segments, whereas amplitude differs; topographical control is important for short-term fluc tuations but should not be over-emphasised. The situation around 1990 is one of spreading readvance and the observed behavioura1 pattems fit with Huybrechts' model for the present dynamic situation of the ice cover. This model indicates that the ice sheet generally is expanding as a consequence of the climatic cooling since the Holocene climatic optimum but also locates areas with present thinning of the ice margin.