Analysis of wintertime atmospheric moisture transport and its variability over southern Europe in the NCEP Reanalyses
Analysis of wintertime atmospheric moisture transport and its variability over southern Europe in the NCEP Reanalyses
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NCEP 再分析中南欧冬季大气水汽输送及其变化的分析
DOI：
10.3354/cr023195
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发表时间：
2003
期刊：
影响因子：
1.1
通讯作者：
E. Zorita
中科院分区：
文献类型：
--
作者：
Jesús Fernández;J. Sáenz;E. Zorita
对美国国家环境预报中心（NCEP）的月降水资料和6小时气象再分析资料进行了分析，以诊断地中海盆地和南欧对流层垂直积分水汽输送的主要模态。在每个网格点和域的边界处的水分传输及其变异性被量化。还计算了与斜压扰动强度和典型路径相关的过滤重力位高度标准差、一点相关图以及Z300-Z500和Z500-Z700厚度等量，以帮助解释结果。很明显，地中海降水的主导模式根源于大西洋风暴路径的动力学和相关的水汽输送。第二种模式代表地中海盆地内部水分的内部再分配。西地中海地区的大气中有水汽，这些水汽被输送到东地中海地区（主要是土耳其和希腊）并在那里沉淀。最后，第三种模式取决于欧洲地形的作用，作为一个阻塞因素的西风水汽输送平流从北大西洋地区。
A common analysis of instrumental monthly precipitation records and 6 h meteorologi- cal Reanalysis from the National Centers for Environmental Prediction (NCEP) was performed to diagnose the main modes of tropospheric, vertically integrated moisture transport over the Mediter- ranean basin and southern Europe. The moisture transport and its variability at each grid point and at the boundaries of the domain were quantified. Quantities such as the standard deviation of filtered geopotential height, one-point correlation maps and Z300-Z500 and Z500-Z700 thicknesses, related to the intensity and typical paths of baroclinic disturbances, were also computed to help in the inter- pretation of the results. It is clear that the leading mode of Mediterranean precipitation has its roots in the dynamics of the Atlantic storm track and the associated moisture transports. The second mode represents the internal redistribution of moisture inside the Mediterranean basin. Moisture is sup- plied to the atmosphere in the western Mediterranean, and this moisture is transported and precipi- tates over the eastern Mediterranean (mainly Turkey and Greece). Finally, the third mode depends on the role of European topography as a blocking factor for westerly moisture transport advected from the North Atlantic region.