摘要
雅安位于四川盆地西缘、青藏高原东麓。由于特定的地理和地形条件所致，降水特多，夏季暴雨频繁，历来素有“天漏”之称。本文基于大量的“雅安天漏”（区域暴雨）个例资料，从气候、大尺度环流、物理量合成、地形作用和中尺度系统等方面进行了研究。结果表明：“雅安无漏”是在青藏高原东坡特定的地形作用下产生的特殊降水现象，其气候特征具有显著的中尺度特点，“夜雨”显著，环境场条件和中尺度系统的物理量结构等方面，都有异于华北、华东和华南等地的暴雨。
Ya'an is located on the west edge of the Sichuan Basin, the east periphery of the Qinghai-Xizang(Tibetan) Plateau. There are very close relationship between the special topography and the precipita-tion in this area. Whether in the aspect of total rain days or total rainfall amount in a year, Ya'an is al-ways an extreme range, which has been called 'Ya-An-Tian-Lou' (YATL) in Chinese.This paper sys-tematically analyses the weather, climate, large-scale circulation, meso-scale systems and especially theterrain effect related to YATL, based on a large number cases of Ya'an heavy rain. The main results areas follows' The YATL is a special precipitation phenomenon affected by the special topography and hasan outstanding meso-scale characteristics. On large-scale, the main weather system affecting the YATLis the subtropical high pressure. The precipitation mainly occurs at night. That is night-time precipita-tion. The raining mechanism and physical structure in Ya'an are extraordinarily different from otherareas.
出处
《大气科学》
CSCD
北大核心
1994年第4期466-475,共10页
Chinese Journal of Atmospheric Sciences
基金
大气科学和地球流体力学数值模拟国家重点实验室资助
关键词
暴风雨
天气分析
大尺度环流
torrential rain, large-scale circulation, orographic precipitation, meso-scale system
