Examining the precipitation associated with medicanes in the high‐resolution ERA‐5 reanalysis data,International Journal of Climatology

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Examining the precipitation associated with medicanes in the high‐resolution ERA‐5 reanalysis data
International Journal of Climatology ( IF 3.5 ) Pub Date : 2020-05-18 , DOI: 10.1002/joc.6669
Wei Zhang ₁ , Gabriele Villarini ₁ , Enrico Scoccimarro ₂ , Francesco Napolitano ₃

Affiliation

Medicanes, hurricane‐like cyclonic systems in the Mediterranean Sea, are becoming an increasingly severe problem for many Mediterranean countries because climate projections suggest a higher risk under anthropogenic forcing even under an intermediate scenario. Due to the small size of these weather systems, high‐resolution data are required to better resolve their structure and evolution. Here we investigate medicanes from the perspective of precipitation using the high‐resolution (0.25°) ERA‐5 reanalysis data released by European Centre for Medium‐Range Weather Forecasts. Overall, we identify a total of 59 medicanes from ERA‐5 data during 1979–2017, with marked year‐to‐year variability. These storms tend to occur mostly between September and March. Overall, the intensity of medicanes (i.e., maximum wind) is lower than that of tropical cyclones, and this is also true for precipitation. The composite precipitation of medicanes increases from the centre to ~0.8° and then decreases. During 1979–2017, many regions along the Mediterranean Sea experienced over 20 extreme precipitation events (i.e., days) which were caused by medicanes, accounting for 2–5% of all the extreme precipitation events.

中文翻译：

在高分辨率ERA-5重新分析数据中检查与药物相关的降水

地中海沿岸的飓风飓风般的军用医疗器械正成为许多地中海国家日益严重的问题，因为气候预测表明，即使在中间情况下，人为强迫也有较高的风险。由于这些天气系统的规模较小，因此需要高分辨率数据才能更好地解析其结构和演变。在这里，我们使用欧洲中距离天气预报中心发布的高分辨率（0.25°）ERA-5再分析数据从降水的角度研究了药物。总体而言，我们在1979-2017年期间从ERA-5数据中识别出总共59种药物，并具有明显的逐年变异性。这些风暴通常发生在9月至3月之间。总体而言，药物的强度（即最大风）低于热带气旋的强度，降水也是如此。药物的复合沉淀从中心增加到〜0.8°，然后下降。在1979–2017年期间，地中海沿岸的许多地区经历了20多次由药物引起的极端降水事件（即几天），占所有极端降水事件的2–5％。

更新日期：2020-05-18

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