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首页> 外文期刊>Journal of marine systems: journal of the European Association of Marine Sciences and Techniques >The North Atlantic subpolar circulation in an eddy-resolving global ocean model
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The North Atlantic subpolar circulation in an eddy-resolving global ocean model

机译：解决涡旋的全球海洋模型中的北大西洋次极环流

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The subpolar North Atlantic represents a key region for global climate, but most numerical models still have well-described limitations in correctly simulating the local circulation patterns. Here, we present the analysis of a 30year run with a global eddy-resolving (1/12 degrees) version of the NEMO ocean model. Compared to the 1 degrees and 1/4 degrees equivalent versions, this simulation more realistically represents the shape of the Subpolar Gyre, the position of the North Atlantic Current, and the Gulf Stream separation. Other key improvements are found in the representation of boundary currents, multi-year variability of temperature and depth of winter mixing in the Labrador Sea, and the transport of overflows at the Greenland-Scotland Ridge. However, the salinity, stratification and mean depth of winter mixing in the Labrador Sea, and the density and depth of overflow water south of the sill, still present challenges to the model. This simulation also provides further insight into the spatio-temporal development of the warming event observed in the Subpolar Gyre in the mid 1990s, which appears to coincide with a phase of increased eddy activity in the southernmost part of the gyre. This may have provided a gateway through which heat would have propagated into the gyre's interior. (C) 2014 The Authors. Published by Elsevier B.V.
机译：亚极北大西洋代表了全球气候的关键区域，但是大多数数值模型在正确模拟局部环流模式方面仍然存在着描述充分的局限性。在这里，我们介绍了使用NEMO海洋模型的全球涡旋解析度（1/12度）运行30年的分析结果。与1度和1/4度等效版本相比，此模拟更现实地表示了亚极回旋的形状，北大西洋洋流的位置以及墨西哥湾流的分隔。在边界流的表示，温度的多年变化和拉布拉多海冬季混合深度的变化以及格陵兰-苏格兰山脊上溢流的运输方面，还发现了其他重要的改进。但是，拉布拉多海冬季混合的盐度，分层和平均深度，以及窗台以南的溢流水的密度和深度，仍然对该模型提出了挑战。该模拟还提供了对1990年代中期在亚极地回旋中观测到的变暖事件的时空发展的进一步见解，这似乎与回旋中最南端的涡旋活动增加相吻合。这可能提供了一个通道，热量将通过该通道传播到回旋管的内部。 （C）2014作者。由Elsevier B.V.发布

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