Locally modified winds regulate North Sea circulation
Locally modified winds regulate North Sea circulation
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DOI：
10.1002/essoar.10508641.1
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发表时间：
2021-11
期刊：
影响因子：
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通讯作者：
A. Akpınar;M. Palmer;M. Inall;B. Berx;J. Polton
中科院分区：
文献类型：
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作者：
A. Akpınar;M. Palmer;M. Inall;B. Berx;J. Polton
在北海的风驱动的流通重新与本地修改风及其影响的具体重点。我们第一次表明，当地极值的风应力旋度（WSC），地形和海洋-大气相互作用，有助于调节环流在北方北海。虽然计算出的运输强烈耦合风应力，这本身是由大规模的强迫，通过挪威海沟的运输更强烈的相关性与WSC场由于当地的极值。这种WSC极值调节挪威海沟周围的次中尺度涡动活动。我们的结论是，当地修改的WSC是地形和海洋-大气相互作用的结果沿着正面挪威海岸线。海洋-大气相互作用被认为是形成WSC极值的潜在机制。我们的研究结果表明，当地的风是更重要的比以前记录的，与区域环流的重要影响可能会导致未来的变化，当地的地面梯度，如可能会出现从不断变化的气象或水文气候强迫。这些对北海环流的额外影响可能不能仅仅从风应力的变化中解释。
Wind driven circulation in the North Sea is revisited with a specific focus on locally modified winds and their impacts. We show for the first time that local extrema of the wind stress curl (WSC), generated by orography and ocean-atmosphere interactions, help regulate circulation in the northern North Sea. While calculated transports are strongly coupled with wind stress, which itself is driven by large-scale forcing, transports through the Norwegian Trench are more strongly correlated with the WSC field due to local extrema. Such WSC extrema regulates the sub-mesoscale eddy activity around the Norwegian Trench. We conclude that local modification of the WSC is a result of both orography and ocean-atmosphere interaction along the frontal Norwegian coastline. Ocean-atmosphere interaction is considered a potential mechanism developing the WSC extrema. Our results show that local winds are more important than previously documented, with important implications for regional circulation likely to result from future changes to local surface gradients, such as may arise from changing meteorological or hydro-climatic forcing. These additional impacts on North Sea circulation that may not be accountable from changes in wind stress alone.