A Lagrangian analysis of the variation in moisture sources related to drier and wetter conditions in regions around the Mediterranean Basin
A Lagrangian analysis of the variation in moisture sources related to drier and wetter conditions in regions around the Mediterranean Basin
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DOI：
10.5194/nhess-11-2307-2011
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发表时间：
2011-08
影响因子：
4.6
通讯作者：
A. Drumond;R. Nieto;E. Hernández;L. Gimeno
中科院分区：
文献类型：
--
作者：
A. Drumond;R. Nieto;E. Hernández;L. Gimeno
抽象的。在这里，我们描述了我们使用拉格朗日三维FLEXPART模型来研究与地中海盆地周围不同地区更干燥和更潮湿的条件有关的水汽来源的变化。我们对2000年3月至2005年2月期间进行了季节性分析，并按季节确定了降雨率最高和最低的年份，平均分布在八个不同的大陆地区。在选定的时间段内，跟踪在目标区域上空识别的颗粒的10天反向轨迹上的比湿度的变化，然后比较不同季节在较潮湿和较干燥条件下的湿度源的特征。尽管它们只代表了一个相对较短的周期，但结果表明，在所选择的大部分年份中，湿润时期的水汽来源更广泛和/或更强烈。北大西洋作为水汽来源对伊比利亚半岛、法国和北非中部的贡献是显而易见的。除此之外，地中海是北非东部以及意大利和巴尔干半岛的主要来源。当地来源为地中海东部和北非西部提供水分。
Abstract. Here, we describe our use of the Lagrangian 3-D FLEXPART model to investigate the variation in sources of moisture related to the drier and wetter conditions of the different regions that surround the Mediterranean Basin. We carried out seasonal analyses for the period from March 2000 to February 2005, and identified those years with the highest and lowest rates of precipitation by season, averaged over eight different continental regions. The variation in specific humidity along the 10-day backward trajectories of the particles identified over the target areas was tracked for the selected period, and the characteristics of the moisture sources were then compared between wetter and drier conditions by season. Although they only represented a relatively short period, the results suggest that in most of the years chosen, the moisture sources were more extensive and/or more intense during wetter periods. The contribution of the north Atlantic as a source of moisture is apparent for the Iberian Peninsula, for France and for Central North Africa. Otherwise, the Mediterranean Sea is the predominant source for Eastern North Africa, and for the Italian and Balkan Peninsulas. Local sources provide moisture for the Eastern Mediterranean and Western North Africa.