The Association of the Elevated Mixed Layer with Significant Severe Weather Events in the Northeastern United States
The Association of the Elevated Mixed Layer with Significant Severe Weather Events in the Northeastern United States
复制标题
高位混合层与美国东北部重大恶劣天气事件的关联
DOI：
10.1175/2010waf2222363.1
复制
发表时间：
2010
影响因子：
2.9
通讯作者：
Michael L. Ekster
中科院分区：
文献类型：
--
作者：
Peter C. Banacos;Michael L. Ekster
摘要本文研究了美国东北部与混合层（EML）空气相关的罕见但重要的恶劣天气事件的发生。总共有447个对流事件日，有一个或多个显著的恶劣天气报告[其中显著定义为冰雹2英寸]。(5.1在1970年至2006年的暖季（5月1日至9月30日），发现了直径大于或等于2.5厘米的对流阵风，65 kt（33 m s-1）或更大的对流阵风，和/或F2或更大强度的龙卷风。其中，34个事件日（7.6%）与事件发生前区域rawinsondes中可识别的EML空气相关。结合1953年和1969年的两次事件，通过合成和轨迹分析，共研究了36次与EML空气相关的重大恶劣天气事件。虽然占总数的比例很小，但这36个事件构成了影响美国东北部的历史上重要的derechos和龙卷风事件的一个值得注意的列表。它被证明th…
Abstract The occurrence of rare but significant severe weather events associated with elevated mixed-layer (EML) air in the northeastern United States is investigated herein. A total of 447 convective event days with one or more significant severe weather report [where significant is defined as hail 2 in. (5.1 cm) in diameter or greater, a convective gust of 65 kt (33 m s−1) or greater, and/or a tornado of F2 or greater intensity] were identified from 1970 through 2006 during the warm season (1 May–30 September). Of these, 34 event days (7.6%) were associated with identifiable EML air in regional rawinsondes preceding the event. Taken with two other noteworthy events in 1953 and 1969, a total of 36 significant severe weather events associated with EML air were studied via composite and trajectory analysis. Though a small percentage of the total, these 36 events compose a noteworthy list of historically significant derechos and tornadic events to affect the northeastern United States. It is demonstrated th...