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| 大气加热场影响西太平洋副热带高压短期位置变化的数值模拟 | |
| 引用本文： | 陈璇,王黎娟,管兆勇,林春泽.大气加热场影响西太平洋副热带高压短期位置变化的数值模拟[J].南京气象学院学报,2011,34(1):99-108. |
| 作者姓名： | 陈璇 王黎娟 管兆勇 林春泽 |
| 作者单位： | 1. 武汉中心气象台,湖北,武汉,430074;南京信息工程大学,气象灾害省部共建教育部重点实验室,江苏,南京,210044 2. 南京信息工程大学,气象灾害省部共建教育部重点实验室,江苏,南京,210044 3. 中国气象局,武汉暴雨研究所,湖北,武汉,430074 |
| 基金项目： | 国家科技支撑计划课题，国家自然科学基金，教育部高校博士点新教师基金，江苏省"青蓝工程"项目 |
| 摘 要： | 利用江淮2003年和华南1998年夏季持续性强降水典型个例,采用区域气候模式RegCM3模拟了强降水期间江淮、华南及孟加拉湾热源异常分布对西太平洋副热带高压短期位置东西进退及南北变动的影响。模拟证实：西太平洋副热带高压位置的短期变异与大气加热场及其配置有密切的联系。持续性强降水期间,副高西侧较远处孟加拉湾热源是诱导西太平洋副热带高压异常西伸的原因之一;华南强降水期间,华南和孟加拉湾热源的共同存在可使副高在季节性西伸过程中出现短期东撤;江淮强降水期间,江淮和孟加拉湾热源的共同存在会诱导副高异常西伸。但模式在模拟副高位置南北变动上效果并不明显,不能证实华南、江淮热源单独存在时对副高在南北位置变异上的阻碍作用。 |
| 关 键 词： | 大气加热场 西太平洋副热带高压 短期位置变化 数值模拟 RegCM3 持续性强降水 |
Simulation of effect of atmospheric heating fields on short-term position variation of the western Pacific subtropical high |
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| CHEN Xuan,WANG Li-juan,GUAN Zhao-yong,LIN Chun-ze.Simulation of effect of atmospheric heating fields on short-term position variation of the western Pacific subtropical high[J].Journal of Nanjing Institute of Meteorology,2011,34(1):99-108. | |
| Authors: | CHEN Xuan WANG Li-juan GUAN Zhao-yong LIN Chun-ze |
| Institution: | 1.Wuhan Central Meteorological Observatory,Wuhan 430074,China;2.Key Laboratory of Meteorological Disaster of Ministry of Education,NUIST,Nanjing 210044,China;3.Institute of Heavy Rain,CMA,Wuhan 430074,China) |
| Abstract: | According to the continuous heavy rainfall events in the Changjiang-Huaihe River valley in summer 2003 and in South China in summer 1998,the ICTP Regional Climate Model（RegCM3）is used to simulate the effect of the heating anomalies over the Changjiang-Huaihe River valley,South China and the Bay of Bengal on the short-term E/W and N/S positions of the Western Pacific Subtropical High（WPSH）during the heavy rainfall.The simulations confirm that the short-term position variations of WPSH are closely associated with the atmospheric heating fields and their patterns.The heat source over the Bay of Bengal to far west of WPSH may induce an anomalous westward extension of WPSH during the continuous heavy rainfall.During the torrential rain in South China,the configuration of heating fields over South China and the Bay of Bengal may lead to a short-term eastward withdrawal of WPSH during its seasonal westward extension.During the torrential rain in Changjiang-Huaihe River valley,the heat sources over Changjiang-Huaihe River valley and the Bay of Bengal may induce an anomalous westward extension of WPSH.But the effect is not evident in the simulation of the N/S position variation of WPSH,which can not approve that the WPSH＇s N/S position variation can be hindered individually by the heating source over South China or Changjiang-Huaihe River valley. |
| Keywords: | RegCM3 |
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