2017年春季一次漓江烟雨特色景观的气象成因分析  

Meteorological causes of fantastical landscape of misty fog over Lijiang River

作　　者：王娟[1] 李向红[1] 唐桥义[1] 唐晓波[1] 李岩[1] 王婷[1] WANG Juan;LI Xiang-hong;TANG Qiao-yi;TANG Xiao-bo;LI Yan;WANG Ting(Guilin Meteorological Bureau,Guilin 541001,China)

机构地区：[1]桂林市气象局,广西桂林541001

出　　处：《桂林理工大学学报》2020年第3期509-515,共7页Journal of Guilin University of Technology

基　　金：广西区气象局气象科研计划项目(2019M16,2017Z06)。

摘　　要：为了解漓江烟雨特色景观的成因,利用桂林市气象局漓江沿岸自动气象站和中国气象局常规气象观测资料,对2017年3月30日桂林一次持续21 h的漓江烟雨天气过程的大气环流形势和大气层结条件进行分析,得出如下结论:(1)弱降水对雨雾的形成、维持以及消散至关重要,过程初期小时降水量1.6~1.9 mm的降水有利于雨雾形成,过程中期小时降水量0~0.8 mm的降水有利于雨雾维持,过程后期小时降水量大于1 mm的降水将导致雨雾消散;(2)本次雨雾过程影响降水的天气系统有:500 hPa南支浅槽、700和850 hPa低空急流和地面低压倒槽;(3)大气为稳定层结,近地面有浅薄逆温层,桂林处于弱切变环境中,湿层深厚,水汽充沛,700 hPa以下均为饱和区。In order to provide tourists a good understanding of the beautiful landscape of Lijiang River,it is very necessary to find out the meteorological causes of the misty fog over the river.Atmospheric circulation and junction conditions about misty fog over the Lijiang River,lasting for 21 hours on 30 th of March in 2017,are analyzed,with the data from automatic weather stations and conventional meteorological observation from China Meteorological Administration.There are following findings.Weak precipitation is essential for the formation,maintenance and dissipation of rain fog.The precipitation between 1.6-1.9 mm is beneficial to the formation of rain fog in early morning.The precipitation between 0-0.8 mm is beneficial to the maintenance of rain fog later,and then the precipitation more than 1 mm will lead to the dissipation of rain fog afterwards.In this process,the weather systems affecting precipitation are the south branch shallow trough of 500 hPa,low-level jet of 700 hPa and 850 hPa,ground inverted trough.The atmosphere provides a stable stratification and a shallow inversion layer near the ground.The environment is weak shear in Guilin.The deeply wet layer,with abundant water vapor,and below 700 hPa,presents saturated areas over the river.

关 键 词：雨雾 漓江烟雨 特色景观 弱降水 气象条件 

分 类 号：P457.7[天文地球—大气科学及气象学]