Development Processes of Baiu Frontal Depressions
Development Processes of Baiu Frontal Depressions
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DOI：
10.2151/sola.2012-003
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发表时间：
2012
期刊：
影响因子：
1.9
通讯作者：
Eigo Tochimoto;T. Kawano
中科院分区：
文献类型：
--
作者：
Eigo Tochimoto;T. Kawano
本文利用2000年至2007年6月和7月的再分析资料，研究了百度前缘低洼的发展过程。根据加深程度，在分析期内检测到的140个BFD可分为已开发的BFD和未开发的BFD。发展的边界层边界层又可分为W-边界层边界层和E-边界层边界层，W-边界层边界层(E-BFDS)峰值位于140°E以西(东)区域。综合分析和许多个例分析表明，低空扰动和潜热的垂直耦合是这两个边界层边界层发展的关键因素。研究还表明，BFDS的发展过程取决于其环境特征。潜热在W-BFDS的发展过程中起着更为重要的作用，其环境以大量水汽为特征。另一方面，低层斜压性对E-BFDS的发展贡献较大，其环境以较大的温度梯度为特征。
This work investigates development processes of Baiu frontal depressions (BFDs) using a reanalysis data set in June and July from 2000 to 2007. On the basis of the deepening magnitude, 140 BFDs detected in the analysis period are categorized into developed and non-developed BFDs. Developed BFDs are further classified into W-BFDs and E-BFDs; W-BFDs (E-BFDs) peak in the region west (east) of 140°E.A composite analysis and many case studies reveal that the vertical coupling between lower- and upper-level disturbances and latent heating are key factors for the development of both BFDs. It is also shown that the development processes of BFDs depend on their environmental features. Latent heating plays a more important role in the development process of W-BFDs, whose environment is characterized as a large amount of water vapor. On the other hand, it is suggested that low-level baroclinicity makes a larger contribution to the development of E-BFDs, whose environment is characterized as a larger temperature gradient.