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首页> 外文期刊>Journal of Geophysical Research, C. Oceans: JGR >Mediterranean oceanic response to the interannual variability of a high-resolution atmospheric forcing: A focus on the Aegean Sea
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Mediterranean oceanic response to the interannual variability of a high-resolution atmospheric forcing: A focus on the Aegean Sea

机译：地中海对高分辨率大气强迫年际变化的响应：以爱琴海为重点

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摘要

We investigated the interannual variability of the Mediterranean Sea thermohaline circulation under present climate conditions using an oceanic model of 1/8° resolution. Two numerical simulations of 50 year duration were performed. In a control simulation the model was forced by a perpetual year forcing inferred from the climatology of the ECMWF fields, while in a random simulation the 6 years of the ECMWF fields were randomly applied. In this way we were able to test the sensitivity of the thermohaline circulation under an atmospheric interannual variability. In particular, during the last 10 years of the random simulation a succession of cold winters led to anomalous deep water formation in the Aegean Sea. We focused our analysis on this event. This anomalously dense water mostly forms in the Central and Southern Aegean subbasins with a formation rate of about 0.6 Sv. This led to strong modifications in water mass budgets and circulation with intensified exchanges between these two subbasins. The export of those dense waters to the Levantine basin remains weak except for a few particular years. Thus the impact of this event is localized as opposed to the Eastern Mediterranean Transient. These results show the possibility for transient events to reoccur in the Eastern basin in the forthcoming years.
机译：我们使用1/8°分辨率的海洋模型调查了当前气候条件下地中海热盐环流的年际变化。进行了两个为期50年的数值模拟。在控制仿真中，该模型受ECMWF田地气候条件推断的永久年份强迫，而在随机模拟中，随机应用了6年的ECMWF田地。通过这种方式，我们能够在大气年际变化下测试热盐循环的敏感性。特别是，在随机模拟的最后十年中，连续的寒冷冬季导致爱琴海深水异常形成。我们将分析重点放在了此事件上。这种异常稠密的水主要在爱琴海中部和南部盆地形成，形成速率约为0.6 Sv。由于这两个子流域之间的交流加剧，导致了水量预算和水流的重大变化。除少数特定年份外，这些浓水向黎凡特盆地的出口仍然疲软。因此，与东地中海瞬变相反，此事件的影响是局部的。这些结果表明，在未来几年内，东部盆地可能会再次发生短暂事件。

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