| 完全Q矢量的引入及其诊断分析 |
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| 引用本文： | 姚秀萍,于玉斌.完全Q矢量的引入及其诊断分析[J].高原气象,2001,20(2):208-213. |
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| 作者姓名： | 姚秀萍 于玉斌 |
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| 作者单位： | 中国气象局培训中心, |
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| 基金项目： | 中国气象局“九五”青年气象科学基金资助 |
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| 摘 要： | 参照准地转Q矢量推导，考虑天气系统发展的主要热力强迫因子－非绝热加热作用，引出考虑非绝热效应的完全Q矢量的概念，并应用于实例分析。结果表明，完全Q矢量能较清楚地揭示暴雨天气系统的演变；考虑了湿过程的完全Q矢量在暴雨的诊断过程中显示了更大的优越性；定性而言，完全Q矢量散度的辐合中心或辐合线、散度场和锋生函数场有助于确定暴雨的落区，暴雨区正好落在低层完全Q矢量散度场辐合中心和锋生函数场正值中心之间；定量而言，低层完全Q矢量散度场辐合中心和锋生函数场正值中心大小对暴雨强度有显著的指示作用。因而在暴雨的诊断和预报过程中完全Q矢量散度和锋生函数是两个重要的参数。
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| 关 键 词： | 完全Q矢量 湿过程 锋生函数 暴雨 诊断过程 对流性天气系统 散度场 |
| 文章编号： | 1000-0534(2001)02-0208-06 |
| 修稿时间： | 2000年1月8日 |
Perfect Q-Vector and Its Diagnoses |
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| YAO Xiu-ping,YU Yu-bin.Perfect Q-Vector and Its Diagnoses[J].Plateau Meteorology,2001,20(2):208-213. |
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| Authors: | YAO Xiu-ping YU Yu-bin |
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| Abstract: | Referring to quasi-geostrophic Q-vector, taking account of the main heating forcing factor-diabatic heating of the development of synoptic systems, the concept of perfect Q-vector was proposed, an expression of the perfect Q-vector and the perfect ω equation, in which the divergence of perfect Q-vector was taken as an only forcing term, was derived in this paper.
And the perfect Q-vector was applied to diagnose a heary rain process for August 3～5, 1996. The results showed that there were more advantageous using the perfect Q-vector, and suggested that the perfect Q-vector could clearly reveal the system development of the heary rain; the divergence center or line, the divergence field and the frontogenesis function field of the perfect Q-vector could be used to locate the heary rain area; the center magnitudes of the perfect Q-vector divergence field and the frontogenesis function field could be signified the intensity of the heary rain. So, the perfect Q-vector divergence and the frontogenesis function are two important parameters in the process of diagnosing and forecasting the heary rain. |
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| Keywords: | Perfect Q vector Wet process Perfect Q vector the frontogenesis function Heary rain |
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