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首页> 外文期刊>Regional Environmental Change >Synoptic patterns associated with extreme dust events in the Mediterranean Basin
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Synoptic patterns associated with extreme dust events in the Mediterranean Basin

机译：地中海盆地极端沙尘天气的天气模式

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Extreme dust events over the western, central and eastern Mediterranean are identified analysing the aerosol optical depth remote-sensed by the Moderate Resolution Imaging Spectroradiometer (MODIS) in 2001-2010 and simulated by the Goddard Chemistry Aerosol Radiation and Transport (GOCART) model in 2000-2007. The seasonal variability of the dust events and the evolution of the synoptic circulation patterns before and during the events are studied. Results show that the highest occurrence of short events (1-3 days) is in the eastern Mediterranean, while long events (more than 4 days) are more frequent in the western Mediterranean. Short events are concentrated in spring, while long events do not show a clear seasonally. The synoptic circulation patterns accompanying short and long events are similar, and the occurrence across the Mediterranean Basin is related to westerly low-pressure systems. Dust events in the western Mediterranean are associated with high-pressure conditions limiting the development of lows to the western North Africa, while the eastward evolution of cyclones over the central Mediterranean and Northern Africa accompanies dust events in the central and eastern Mediterranean.
机译：通过分析2001-2010年中分辨率成像分光光度计（MODIS）遥感的气溶胶光学深度，并通过2000年的哥达德化学气溶胶辐射与运输（GOCART）模型进行模拟，确定了地中海西部，中部和东部的极端尘埃事件。 -2007。研究了沙尘暴事件的季节变化以及在沙尘暴发生之前和之中的天气环流模式的演变。结果表明，短事件（1-3天）的发生率最高的地区是地中海东部，而长事件（超过4天）的发生频率在地中海西部更为频繁。短期活动集中在春季，而长期活动则没有明显的季节性。伴随短期和长期事件的天气环流模式相似，整个地中海盆地的发生与西风低压系统有关。地中海西部的沙尘事件与高压条件有关，从而限制了低气压向北非西部的发展，而中部地中海和北非的旋风向东演变则伴随着中部和东部地中海的沙尘事件。

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