Mid- to Late Pleistocene ice drift in the western Arctic Ocean: Evidence for a different circulation in the past
Mid- to Late Pleistocene ice drift in the western Arctic Ocean: Evidence for a different circulation in the past
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DOI：
10.1126/science.277.5322.74
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发表时间：
1997-07-04
期刊：
影响因子：
56.9
通讯作者：
Darby, DA
中科院分区：
文献类型：
--
作者：
Bischof, JF;Darby, DA
4个北极沉积物冰芯中的冰筏碎片（IRD）的来源表明，在最近70万年的中晚更新世冰消期，来自西北劳伦泰德冰盖的冰山沿沿着180度-0度向弗拉姆海峡漂过北冰洋西部。这一冰山漂移与现今的博福特环流不同，类似于错位的跨极漂移（TPD）。海冰主要沿着冰山的轨迹移动，但也经常从俄罗斯大陆架向东漂流到美亚盆地。
The provenance of ice-rafted debris (IRD) in four Arctic sediment cores implies that icebergs from the northwestern Laurentide ice sheets drifted across the western Arctic Ocean along the 180 degrees-0 degrees meridian toward Fram Strait during mid- to late Pleistocene deglaciations within the last 700,000 years. This iceberg drift was different from the present-day Beaufort Gyre circulation and resembled a dislocated transpolar drift (TPD). Sea ice mainly followed the iceberg trajectories but also frequently drifted from the Russian shelves eastward into the Amerasian Basin.