Twentieth century increase in snowfall in coastal West Antarctica
Twentieth century increase in snowfall in coastal West Antarctica
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DOI：
10.1002/2015gl065750
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发表时间：
2015-11-16
影响因子：
5.2
通讯作者：
Ludlow, E. C.
中科院分区：
文献类型：
--
作者：
Thomas, E. R.;Hosking, J. S.;Ludlow, E. C.
近几十年来，南极西部冰盖的阿蒙森海部分一直在失去质量;然而，需要长期的积雪记录来了解最近的变化。在这里，我们提出了300年的积雪记录从两个冰芯钻在埃尔斯沃思土地，南极洲西部。记录显示，世纪积雪急剧增加，与阿蒙森海低压（ASL）加深，热带海面温度和大规模大气环流有关。观测到的20世纪后期积雪和年际变化的增加在过去300年中是前所未有的，这表明最近南极洲界线的加深是一个长期趋势的一部分。
The Amundsen Sea sector of the West Antarctic ice sheet has been losing mass in recent decades; however, long records of snow accumulation are needed to place the recent changes in context. Here we present 300 year records of snow accumulation from two ice cores drilled in Ellsworth Land, West Antarctica. The records show a dramatic increase in snow accumulation during the twentieth century, linked to a deepening of the Amundsen Sea Low (ASL), tropical sea surface temperatures, and large-scale atmospheric circulation. The observed increase in snow accumulation and interannual variability during the late twentieth century is unprecedented in the context of the past 300 years and evidence that the recent deepening of the ASL is part of a longer trend.