The Effects of the Gulf of California SSTs on Warm-Season Rainfall in the Southwestern United States and Northwestern Mexico: A Regional Model Study
The Effects of the Gulf of California SSTs on Warm-Season Rainfall in the Southwestern United States and Northwestern Mexico: A Regional Model Study
复制标题
加利福尼亚湾海温对美国西南部和墨西哥西北部暖季降雨的影响：区域模型研究
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
J. Roads
中科院分区：
文献类型：
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作者：
Jinwon Kim;Jongyoun Kim;J. Farrara;J. Roads
摘要通过两组不同海表温度的季节模拟，研究了加利福尼亚湾北部海表温度（SSTs）对与北美季风（NAM）相关的亚利桑那-新墨西哥（AZNM）和墨西哥西北部（NWM）暖季降水的影响。模拟重现了季风降水开始前后的中尺度低层环流和高空场的重要特征，如气相带和陆地之间的低空风的海风样日变化，降雨开始后气相带和西马德雷山脉西坡上空的东南偏南风的发展，以及季风降雨开始前后AZNM上空500 hpa高压的增强。高空场和日降水的模拟时间变化，以及GC周围的中尺度环流，表明GC海温影响了周围的水循环。
Abstract The impacts of the sea surface temperatures (SSTs) in the northern Gulf of California (GC) on warm-season rainfall in the Arizona–New Mexico (AZNM) and the northwestern Mexico (NWM) regions associated with the North American monsoon (NAM) are examined from two sets of seasonal simulations in which different SSTs were prescribed in the GC. The simulations reproduced important features in the low-level mesoscale circulations and upper air fields around the time of monsoon rainfall onset in AZNM such as sea-breeze-like diurnal variations in the low-level winds between the GC and the land, development of south-southeasterly winds over the GC and the western slope of the Sierra Madre Occidental after the onset of rainfall, and the strengthening of the 500-hPa high over AZNM around the onset of monsoon rainfall in AZNM. The simulated temporal variations in the upper air fields and daily rainfall, as well as the mesoscale circulation around the GC, suggest that the GC SSTs affect the water cycle around ...