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首页> 外文期刊>Geophysical Research Letters >Importance of the Gulf of Mexico as a climate driver for US severe thunderstorm activity
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Importance of the Gulf of Mexico as a climate driver for US severe thunderstorm activity

机译:墨西哥湾作为美国严重雷暴活动的气候驱动因素的重要性

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摘要

Different features of the Gulf of Mexico (GOM), such as the Loop Current and warm-core rings, are found to influence monthly-to-seasonal severe weather occurrence in different regions of the United States (U.S.). The warmer (cooler) the GOM sea surface temperatures, the more (less) hail and tornadoes occur during March-May over the southern U.S. This pattern is reflected physically in boundary layer specific humidity and mixed-layer convective available potential energy, two large-scale atmospheric conditions favorable for severe weather occurrence. This relationship is complicated by interactions between the GOM and El Nino-Southern Oscillation (ENSO) but persists when analyzing ENSO neutral conditions. This suggests that the GOM can influence hail and tornado occurrence and provides another source of regional predictability for seasonal severe weather.
机译:已发现墨西哥湾(GOM)的不同特征,例如“环流”和“暖芯环”,会影响美国不同地区(美国)每月至季节性的恶劣天气。在美国南部,3月至5月,GOM海面温度越高(越凉),冰雹和龙卷风越多(越少)。这种模式在物理上反映在边界层比湿和混合层对流的可用势能上,其中两个较大。有利于恶劣天气发生的大气条件。 GOM和厄尔尼诺-南方涛动(ENSO)之间的相互作用使这种关系复杂化,但在分析ENSO中性条件时仍然存在。这表明GOM可影响冰雹和龙卷风的发生,并为季节性恶劣天气提供了区域可预测性的另一个来源。

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