西南涡加密探空资料对模式初值及西南涡路径的影响  

The Impact of Southwest Vortex Intensive Sounding Data on AREM Model Initial Values and Its Moving Path

作　　者：卢萍[1] 李英[1] 

机构地区：[1]中国气象局成都高原气象研究所/高原与盆地暴雨旱涝灾害四川省重点实验室,成都610072

出　　处：《高原山地气象研究》2015年第2期1-6,共6页Plateau and Mountain Meteorology Research

基　　金：国家自然科学基金项目(41275051;41405145);公益性行业(气象)科研专项经费项目(GYHY201206039)

摘　　要：本文基于AREM模式,将高原所的西南涡加密探空资料引入模式作为初值后,进行敏感性试验,通过对比分析后发现:(1)在初值中引入加密探空资料后,四川东北部地区700h Pa位势高度普遍偏低,西南部也略有偏低,而与之相反的是西北地区(甘肃)上空的位势高度场则多表现为偏高状态。700h Pa高度上温度场以偏低为主,越靠近高原东侧边坡地带,偏差越显著,而川东北部地区则显示为正温度偏差。川西高原及边坡地带整层水汽含量显著偏少,而川北地区却偏多。正风速差值多出现在低涡西侧区域。(2)低涡路径的强波动主要发生在模拟前期,此后的低涡路径则是在前期磨合协调状态的基础上继续移动发展从降水分布来看,低涡停滞时间越长,降水量则越大。Based on AREM model,using intensive sounding data of Southwest Vortex as initial values,the sensitive tests are conducted and the conclusions are as follows.（ 1） After intensive sounding data are added,700 h Pa geopotential height in the northeast Sichuan Province is generally low and also slightly low in the southwest area,but conversely in the northwest Gansu Province. Temperature field in 700 h Pa is mainly low and the deviation is much more remarkable close to the edge of eastern Plateau,while in the northeast Sichuan it shows positive temperature deviation. Total water vapor content in the eastern and edge of Plateau obviously decreases but increases in the north Sichuan. Positive deviation of wind speed mainly appears in the west area of Southwest Vortex.（ 2） The moving path of Southwest Vortex fluctuates mostly in the earlier stage of simulation,and in the later stage Vortex develops and moves on the basis of earlier status. As to precipitation,the longer the Vortex stays,the more the amount of precipitation.

关 键 词：AREM模式 西南涡 初值 移动路径 

分 类 号：P459[天文地球—大气科学及气象学]