Transoceanic wave propagation links iceberg calving margins of Antarctica with storms in tropics and Northern Hemisphere
Transoceanic wave propagation links iceberg calving margins of Antarctica with storms in tropics and Northern Hemisphere
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DOI：
10.1029/2006gl027235
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发表时间：
2006-09-12
影响因子：
5.2
通讯作者：
Thom, Jonathan E.
中科院分区：
文献类型：
--
作者：
MacAyeal, Douglas R.;Okal, Emile A.;Thom, Jonathan E.
我们在罗斯冰架和漂浮在罗斯海的各种冰山上部署了地震仪（包括B15A，B15的一个100公里乘30公里的大碎片，它于2000年3月从罗斯冰架上崩解）。这些数据表明，这些浮冰块的主导能量是在0.01至0.1赫兹波段，并与海涌产生的热带和热带外太平洋。例如，2005年10月21日阿拉斯加湾距离罗斯海约13 500公里的一场强风暴产生的涌浪于2005年10月27日在阿代尔角附近解体之前和期间到达B15 A。如果海浪影响冰山的崩解和分解，南极冰盖质量平衡和全球天气系统之间存在遥相关。
We deployed seismometers on the Ross Ice Shelf and on various icebergs adrift in the Ross Sea ( including B15A, a large 100 km by 30 km fragment of B15, which calved from the Ross Ice Shelf in March, 2000). The data reveal that the dominant energy of these floating ice masses is in the 0.01 to 0.1 Hz band, and is associated with sea swell generated in the tropical and extra-tropical Pacific Ocean. In one example, a strong storm in the Gulf of Alaska on 21 October 2005, approximately 13,500 km from the Ross Sea, generated swell that arrived at B15A immediately prior to, and during, its break-up off Cape Adare on 27 October 2005. If sea swell influences iceberg calving and break-up, a teleconnection exists between the Antarctic ice sheet mass balance and weather systems worldwide.