Analysis of a Progressive Derecho Climatology and Associated Formation Environments
Analysis of a Progressive Derecho Climatology and Associated Formation Environments
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渐进式 Derecho 气候学和相关形成环境的分析
DOI：
10.1175/mwr-d-15-0256.1
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发表时间：
2016
影响因子：
3.2
通讯作者：
L. Bosart
中科院分区：
文献类型：
--
作者：
C. Guastini;L. Bosart
摘要1996-2013年5月至8月，美国进步的derecho气候学完全存在于现代雷达时代，在18年的跨度确定256 derecho事件。与先前的derecho研究一致，一条增强的derecho活动走廊从明尼苏达州南部延伸到俄亥俄州和西弗吉尼亚州的边界，阿巴拉契亚山脉以东明显减少。在堪萨斯和俄克拉荷马州存在第二个最大的进步derecho活动。derecho的频率按月的温暖季节的分析表明，北移的频率，通过7月和derecho的频率增加，通过上半年的温暖季节，随后在8月大幅减少。256个确定derecho事件主观分为7个不同的类别，根据天气环境，它们形成。虽然流行的“西北气流”概念模型被认为是占主导地位的渐进式derecho天气类别，暖季渐进式的常见现象。
AbstractA 1996–2013 May–August U.S. progressive derecho climatology existing entirely within the modern radar era is constructed identifying 256 derecho events over the 18-yr span. A corridor of enhanced derecho activity in agreement with previous derecho studies stretches from southern Minnesota to the border of Ohio and West Virginia with a marked decrease east of the Appalachian Mountains. A secondary maximum in progressive derecho activity exists in Kansas and Oklahoma. Analyses of derecho frequency by month of the warm season indicate a northward shift in frequency through July and an increase in derecho frequency through the first half of the warm season followed by a large decrease in August.The 256 identified derecho events are divided subjectively into seven distinct categories based on the synoptic environments in which they form. While the prevailing “northwest flow” conceptual model is upheld as the dominant progressive derecho synoptic category, the common occurrence of warm-season progressiv...