Mesoscale Moisture Analysis of the North American Monsoon
Mesoscale Moisture Analysis of the North American Monsoon
复制标题
北美季风的中尺度水分分析
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
E. Berbery
中科院分区：
文献类型：
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作者：
E. Berbery
利用Eta模式中尺度分析和预报的三个夏季（1995-97年7 - 9月），研究了北美季风核心区墨西哥西北部大降水的区域环流。分析是由埃塔模式自己的四维数据同化系统，其中包括不同的组合观测。与卫星估计和以前的观测研究的预测降水的比较表明，在墨西哥西北部的模式的位置，形状和规模的相似性，在马德雷山脉西方的斜坡上的降水量的大小也是类似的，从基于雨量计观测的气候。对早晨和傍晚降水预报的检验也表明与高分辨率卫星的等效估计值一致。在墨西哥东部的特万特佩克地峡发现了过量的模型预测降水，这似乎与…
Abstract The regional circulations that contribute moisture to the large precipitation over northwestern Mexico, the core region of the North American monsoon, are investigated using three summer seasons (July–September 1995–97) of Eta Model mesoscale analyses and forecasts. Analyses are produced by the Eta Model’s own four-dimensional data assimilation system that includes a diverse mix of observations. Comparison of the forecast precipitation with satellite estimates and previous observational studies shows similarity in location, shape, and scale of the patterns over northwestern Mexico; the magnitude of the precipitation over the slopes of the Sierra Madre Occidental is also similar to that from climatologies based on rain gauge observations. Examination of the morning and evening forecast precipitation also reveals agreement with equivalent estimates from high-resolution satellites. Excessive model forecast precipitation is found over the Isthmus of Tehuantepec in eastern Mexico, which seems related,...