违反了 PRIMARY KEY 约束 'PK_t_counter'。不能在对象 'dbo.t_counter' 中插入重复键。 语句已终止。 青藏高原热力对四川盆地西部一次持续性暴雨影响的数值模拟-The impacts of heating from Tibetan Plateau on the persistent heavy rainfall in the west Sichuan Basin by numerical simulation
doi:  10.3878/j.issn.1006-9585.2017.17166
青藏高原热力对四川盆地西部一次持续性暴雨影响的数值模拟

The impacts of heating from Tibetan Plateau on the persistent heavy rainfall in the west Sichuan Basin by numerical simulation
摘要点击 20  全文点击 8  投稿时间:2017-11-28  修订日期:2017-12-21
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基金:  国家自然科学基金;高原大气与环境四川省重点实验室开放课题
中文关键词:  四川盆地,持续性暴雨,数值模拟,青藏高原
英文关键词:  Sichuan  Basin persistent  heavy rainfall  numerical simulation  Tibetan Plateau
        
作者中文名作者英文名单位
张元春zhangyuanchun中国科学院大气物理研究所云降水物理与强风暴重点实验室
李娟天水市气象局
孙建华中国科学院大气物理研究所云降水物理与强风暴重点实验室
引用:张元春,李娟,孙建华..青藏高原热力对四川盆地西部一次持续性暴雨影响的数值模拟[J].气候与环境研究
Citation:zhangyuanchun..The impacts of heating from Tibetan Plateau on the persistent heavy rainfall in the west Sichuan Basin by numerical simulation[J].Climatic and Environmental Research(in Chinese)
中文摘要:
      本文通过对四川盆地西部一次持续性暴雨过程的半理想数值模拟,研究了青藏高原热力作用对四川盆地持续性暴雨过程的影响。研究表明,高原的热力作用对于下游地区有着显著的影响,主要表现为:(1) 关闭高原地面感热和潜热后,高原地区和四川盆地西部的降水明显减弱,而盆地中东部降水却有所加强,且四川盆地降水的日变化特征稍有减弱;(2) 500 hPa青藏高原上的短波槽减弱,位于四川盆地中西部的背风槽强度、范围有所减弱,但低层盆地东部的气旋性涡旋加强;(3)涡度收支的定量分析发现,关闭高原热力作用后,盆地东部对流层低层垂直风切变的增强使得夜间倾斜项的正贡献增强,从而使该区域涡旋发展加强,盆地东部降水增强。
Abstract:
      The influence of sensible heat and latent heat anomalies over Tibetan Plateau(TP) on the persistent rainfall in the west Sichuan Basin areas was investigated via a semi-idealized mesoscale numerical model WRF(Weather Research and Forecasting) simulation. Analyses of the simulation showed that the rainfall in TP and western Sichuan Basin was decreased, while the rainfall in central and eastern Sichuan Basin was increased, the intensity of precipitation diurnal variation weakened; the trough over TP on 500 hPa was disappear, the strength and scope of westerly trough reduced slightly, but the meso-cyclone at the low levels in east Sichuan Basin enhanced; according to the quantitative analysis of vorticity budget during the heavy rain period, we reached the conclusion that the strengthening of vertical wind shear in the lower troposphere have the positive contribution to strengthen the TILT in east Sichuan Basin, so as to facilitated the development of vortex in key area of Sichuan Basin, this also increased the precipitation in east Sichuan Basin.
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