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首页> 外文期刊>Journal of Physical Oceanography >Evolution of the Deep Water in the Canadian Basin in the Arctic Ocean
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Evolution of the Deep Water in the Canadian Basin in the Arctic Ocean

机译：北冰洋加拿大盆地深水的演变

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摘要

An overflow of magnitude 0.25 Sv (Sv ≡ 10~6 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 hydrographic observations are used to rule out any significant flow of dense water from the Makarov Basin into the deep Canada Basin, confirming previous hypotheses of isolation of the deep water in the Canada Basin.
机译：据预测，从欧亚盆地进入欧亚盆地的马卡罗夫盆地（北冰洋加拿大盆地的一部分）将出现0.25 Sv（Sv≡10〜6 m〜（-3）s〜（-1））的溢流。罗蒙诺索夫山脊中的深缝。作者认为，这种溢流不会使深马卡罗夫盆地（2400 m以下）通风，那里的水太热和太咸，无法与如此大的冷鲜流入量相适应。但是，必须排除对马卡罗夫盆地均质底层的完全隔离，因为变化太小而无法测量到流入盆地的地热通量的一小部分。似乎需要从阿蒙森盆地少量流入约0.01 Sv的新鲜冷水。如果分开的罗蒙诺索夫山脊中的缝隙比以前想象的要浅，就会发生这种情况。如果间隙中的预测溢流被有效地混合和稀释，也可能发生，仅留下一小部分下降到深马卡罗夫盆地。水力理论和水文观测被用来排除从马卡洛夫盆地到加拿大深海盆地的任何大量稠密水流，从而证实了加拿大盆地深水隔离的先前假设。

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