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| 远距离台风暴雨过程的正/斜压不稳定 | |
| 引用本文： | 张兴强,孙兴池,丁治英.远距离台风暴雨过程的正/斜压不稳定[J].南京气象学院学报,2005,28(1):78-85. |
| 作者姓名： | 张兴强 孙兴池 丁治英 |
| 作者单位： | 1. 南京信息工程大学,大气科学系,江苏,南京,210044;泰安市气象局,山东,泰安,271000 2. 山东省气象中心,山东,济南,250031 3. 南京信息工程大学,大气科学系,江苏,南京,210044 |
| 基金项目： | 山东省气象局课题“泰安市中小尺度暴雨预报模式研究” |
| 摘 要： | 利用正／斜压联合不稳定计算方法，分析了由9711号台风引起的远距离台风暴雨(实况及MM4模拟结果)过程中不同时段、不同位置的正／斜压项。结果表明：台风暴雨初始时段的降水主要由台风系统本身正压不稳定扰动引起，随着台风与西风带系统的结合，其南北部出现了2个雨区，均是正／斜压联合不稳定的产物；北部雨区的斜压不稳定较明显，且有随高空急流的非纬向性增强而增强的趋势。 |
| 关 键 词： | 正／斜压联合不稳定 远距离台风暴雨 非纬向高空急流 |
| 文章编号： | 1000-2022(2005)01-0078-08 |
Barotropic/Baroclinic Joint Instability in the Storm Rainfall Far from a Typhoon |
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| ZHANG Xing-qiang.Barotropic/Baroclinic Joint Instability in the Storm Rainfall Far from a Typhoon[J].Journal of Nanjing Institute of Meteorology,2005,28(1):78-85. | |
| Authors: | ZHANG Xing-qiang |
| Institution: | ZHANG Xing-qiang~ |
| Abstract: | Application of the analysis and calculation of the barotropic/baroclinic joint instability in the storm rainfall far from a typhoon are introduced.Based on simulations and observations,analyses and calculations of barotropic and baroclinic items were carried out at different time levels and positions in the storm rainfall induced by 9711 typhoon.Results show that precipitation at the initial stage was basically caused by barotropic disturbances,and two rainfall areas,caused by the barotropic/baroclinic joint instability,occurred to the south and north of the typhoon circulation along with the coupling of the typhoon and the westerly trough.Especially,the baroclinic instability was more obvious in the north rain area,and had a strengthening trend with the non-zonal enhancement of the high-level jet.So we can conclude that the storm rainfall far from the typhoon is the offspring of the barotropic/baroclinic joint instability, and the strengthening of the baroclinic instability is closely associated with the non-zonal high-level jet. |
| Keywords: | barotropic/baroclinic joint instability storm rainfall far from typhoon non-zonal high-level jet |
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