A Numerical Investigation of Formation and Variability of Antarctic Bottom Water off Cape Darnley, East Antarctica
A Numerical Investigation of Formation and Variability of Antarctic Bottom Water off Cape Darnley, East Antarctica
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DOI：
10.1175/jpo-d-14-0069.1
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发表时间：
2014-11
影响因子：
3.5
通讯作者：
Y. Nakayama;K. Ohshima;Y. Matsumura;Y. Fukamachi;H. Hasumi
中科院分区：
文献类型：
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作者：
Y. Nakayama;K. Ohshima;Y. Matsumura;Y. Fukamachi;H. Hasumi
在南极洲周围的几个地方，密集的水是由于强烈的海冰形成而形成的。当这些稠密的水变得比周围的水足够稠密时，它沿着大陆斜坡下降，形成南极底层水（AABW）。本研究采用非流体静力学模型，描述了东南极洲达恩利角（Cape Darnley Bottom Water，CDBW）海岸外的AABW地层。该模型被迫为8个月的时间均匀的表面盐通量（因为海冰形成）估计从先进的微波扫描辐射计地球观测系统（EOS; AMSR-E）的数据和热收支计算。作者再现了AABW形成和相关的致密水周期性下坡流。稠密水的下降路径在很大程度上取决于地形;大多数稠密水流入大陆架上的洼地，平流进入大陆坡，并被峡谷引导下坡到更深的地方。强烈的海冰形成是…
AbstractAt several locations around Antarctica, dense water is formed as a result of intense sea ice formation. When this dense water becomes sufficiently denser than the surrounding water, it descends the continental slope and forms Antarctic Bottom Water (AABW). This study presents the AABW formation off the coast of Cape Darnley [Cape Darnley Bottom Water (CDBW)] in East Antarctica, using a nonhydrostatic model. The model is forced for 8 months by a temporally uniform surface salt flux (because of sea ice formation) estimated from Advanced Microwave Scanning Radiometer for Earth Observing System (EOS; AMSR-E) data and a heat budget calculation. The authors reproduce AABW formation and associated periodic downslope flows of dense water. Descending pathways of dense water are largely determined by the topography; most dense water flows into depressions on the continental shelf, advects onto the continental slope, and is steered downslope to greater depths by the canyons. Intense sea ice formation is the ...