Deep-sea coral evidence for rapid change in ventilation of the deep North Atlantic 15,400 years ago
Deep-sea coral evidence for rapid change in ventilation of the deep North Atlantic 15,400 years ago
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DOI：
10.1126/science.280.5364.725
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发表时间：
1998-05-01
期刊：
影响因子：
56.9
通讯作者：
Edwards, RL
中科院分区：
文献类型：
--
作者：
Adkins, JF;Cheng, H;Edwards, RL
底栖珊瑚物种的放射性碳和钍-230的耦合测年表明，北大西洋上深水的通风量在最后一次消冰期间发生了很大的变化。北大西洋西部几种年龄相同的珊瑚的放射性碳年龄（15.41±0.17千年）和几乎相同的深度（1800米），在样本30至160年的寿命期间增加了670年之多。一个珊瑚中的镉/钙比例表明这些深水的营养成分也增加了。我们的数据表明，在表层海洋和大气的快速变化期间，深海在十年至百年的时间尺度上发生了变化。
Coupled radiocarbon and thorium-230 dates from benthic coral species reveal that the ventilation rate of the North Atlantic upper deep water varied greatly during the last deglaciation. Radiocarbon ages in several corals of the same age, 15.41 +/- 0.17 thousand years, and nearly the same depth, 1800 meters, in the western North Atlantic Ocean increased by as much as 670 years during the 30- to 160-year life spans of the samples. Cadmium/calcium ratios in one coral imply that the nutrient content of these deep waters also increased. Our data show that the deep ocean changed on decadal-centennial time scales during rapid changes in the surface ocean and the atmosphere.