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首页> 外文期刊>Journal of Geophysical Research, C. Oceans: JGR >Impacts of atmospheric modes of variability on Mediterranean Sea surface heat exchange
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Impacts of atmospheric modes of variability on Mediterranean Sea surface heat exchange

机译：大气模式变化对地中海表面热交换的影响

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The impacts of variations in the state of the first four modes of atmospheric variability in the North Atlantic/Europe region on air-sea heat exchange in the Mediterranean Sea are considered. Observation-based indices of these modes from the NOAA Climate Prediction Centre are used together with two reanalysis (NCEP/NCAR and ARPERA) surface flux data sets for the period 1958-2006 to determine their relative influence on the mean heat budget of the full Mediterranean basin and the eastern and western subbasins. The modes considered are the North Atlantic Oscillation (NAO), East Atlantic pattern (EA), Scandinavian pattern (SCAN), and East Atlantic/ West Russian pattern (EA/WR). Similar results are obtained with both NCEP/NCAR and ARPERA. In each case, winter anomalies dominate the annual mean heat budget and the leading mode, the NAO, has a surprisingly small impact on the full basin winter mean heat budget, <5 Wm~(-2). In contrast, the EA mode has a major effect, of order 25 Win~(-2) with similar impacts on both the eastern and western Mediterranean. The SCAN mode has the weakest influence of those considered. The EA/WR mode plays a significant role but, in contrast to the EA mode, it generates a dipole in the heat exchange with an approximately equal and opposite signal of about 15 Win~(-2) on the eastern and western subbasins. A particularly strong impact in the Aegean Sea is observed for the EA/WR mode and this is discussed in the context of episodic deep water formation in this region.
机译：考虑了北大西洋/欧洲区域前四种大气变化模式的状态变化对地中海海气热交换的影响。来自NOAA气候预测中心的这些模式的基于观测的指数与两个重新分析（NCEP / NCAR和ARPERA）在1958-2006年期间的表面通量数据集一起使用，以确定它们对整个地中海地区平均热量收支的相对影响。盆地和东西部盆地。所考虑的模式是北大西洋涛动（NAO），东大西洋模式（EA），斯堪的纳维亚模式（SCAN）和东大西洋/西俄罗斯模式（EA / WR）。使用NCEP / NCAR和ARPERA可获得相似的结果。在每种情况下，冬季异常均占年平均热量预算的主导，而主导模式NAO对全盆区冬季平均热量预算<5 Wm〜（-2）的影响小得令人惊讶。相比之下，EA模式具有较大的影响，即25 Win〜（-2）阶数，对地中海的东部和西部具有相似的影响。扫描模式具有较弱的影响。 EA / WR模式起着重要的作用，但与EA模式相反，它在热交换中产生一个偶极子，在东部和西部子流域上具有大约15 Win〜（-2）的近似相等且相反的信号。对于EA / WR模式，在爱琴海产生了特别强烈的影响，并在该地区的偶发性深水形成背景下进行了讨论。

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