Evolution of the Deep Water in the Canadian Basin in the Arctic Ocean
Evolution of the Deep Water in the Canadian Basin in the Arctic Ocean
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DOI：
10.1175/jpo2906.1
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发表时间：
2006-05
影响因子：
3.5
通讯作者：
M. Timmermans;C. Garrett
中科院分区：
文献类型：
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作者：
M. Timmermans;C. Garrett
摘要：预计规模为 0.25 Sv (Sv ≠ 106 m−3 s−1) 的溢流将从欧亚盆地通过罗蒙诺索夫海岭的深隙进入马卡罗夫盆地（北冰洋加拿大盆地的一部分）。作者认为，这种溢流无法使马卡罗夫盆地深处（2400 米以下）通风，那里的水太温暖且太咸，无法与如此大的冷新鲜水流兼容。然而，必须排除马卡罗夫盆地均匀底层的完全隔离，因为那里的变化太小，不可能由测量到的进入盆地的地热热通量的一小部分引起。似乎需要来自阿蒙森盆地约 0.01 Sv 的少量冷新鲜水流。如果罗蒙诺索夫海岭的裂缝比之前想象的要浅，这种情况就可能发生。如果间隙中预测的溢流发生积极混合和稀释，只留下一小部分下降到马卡罗夫盆地深处，也可能发生这种情况。水利理论与液压...
Abstract An overflow of magnitude 0.25 Sv (Sv ≡ 106 m−3 s−1) has been predicted to enter the Makarov Basin (part of the Canadian Basin in the Arctic Ocean) from the Eurasian Basin via a deep gap in the dividing Lomonosov ridge. The authors argue that this overflow does not ventilate the deep Makarov Basin (below 2400 m) where the water is too warm and salty to be compatible with such a large cold fresh inflow. However, complete isolation of the homogeneous bottom layer of the Makarov Basin must be ruled out because changes there are too small to arise from more than a small fraction of the measured geothermal heat flux into the basin. A small cold fresh inflow of about 0.01 Sv from the Amundsen Basin seems to be required. This could occur if the gap in the dividing Lomonosov Ridge is shallower than previously thought. It could also occur if there is active mixing and dilution of the predicted overflow in the gap, leaving only a small fraction to descend into the deep Makarov Basin. Hydraulic theory and hy...