Upper-Tropospheric Precursors to the Formation of Subtropical Cyclones that Undergo Tropical Transition in the North Atlantic Basin
Upper-Tropospheric Precursors to the Formation of Subtropical Cyclones that Undergo Tropical Transition in the North Atlantic Basin
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DOI：
10.1175/mwr-d-16-0263.1
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发表时间：
2017-01
影响因子：
3.2
通讯作者：
A. M. Bentley;L. Bosart;D. Keyser
中科院分区：
文献类型：
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作者：
A. M. Bentley;L. Bosart;D. Keyser
摘要本研究的目的是研究北大西洋（NATL）亚热带气旋（STC）形成的各种上层对流层前兆的结构和演变。季节内的变化与NATL STC的位置和频率形成在存在类似的上层对流层的功能，以及在各种上层对流层的前体的NATL STC的形成，经历TT的相似性和差异，检查。使用0.5° NCEP气候预报系统再分析数据集，根据1979-2010年期间与其形成相关的对流层上层特征对经过TT的NATL STC进行分类。这种分类允许在类似的对流层上层特征存在的情况下记录STC形成的位置和频率，并在STC形成之前的五天内构建气旋相关复合物。
AbstractThe opportunity to examine the structure and evolution of the various upper-tropospheric precursors to the formation of North Atlantic (NATL) subtropical cyclones (STCs) that undergo tropical transition (TT) motivates this study. Intraseasonal variability associated with the location and frequency of NATL STCs forming in the presence of similar upper-tropospheric features, as well as similarities and differences in the various upper-tropospheric precursors to the formation of NATL STCs that undergo TT, are examined. NATL STCs that undergo TT are categorized according to the upper-tropospheric features associated with their formation during 1979–2010 using the 0.5° NCEP Climate Forecast System Reanalysis dataset. This categorization allows for the documentation of the location and frequency of STCs forming in the presence of similar upper-tropospheric features and for the construction of cyclone-relative composites during the five days prior to STC formation.NATL STCs that undergo TT are separated ...