吉林省春季降水性層狀云基本結(jié)構(gòu)及降水潛力的初步研究

doi:10.3969/2012jms.00**

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吉林省春季降水性層狀云基本結(jié)構(gòu)及降水潛力的初步研究
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                        10.3969/2012jms.00**
                    
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中圖分類號(hào):P458
基金項(xiàng)目:本文受國(guó)家科研院所社會(huì)公益研究專項(xiàng)基金項(xiàng)目（編號(hào)：2001DIB10084）資助

THE PRELIMINARY STUDY OF THE BASIC STRUCTURE OF PRECIPITATING STRATUS AND PRECIPITATION POTENTIAL IN SPRING IN JILIN PROVINCE

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2001年、2002年利用美國(guó)粒子測(cè)量系統(tǒng)（PMS）對(duì)吉林省5～7月降水性層狀云在實(shí)施人工增雨作業(yè)的同時(shí)進(jìn)行了科研探測(cè)，取得了一批資料，對(duì)這些資料進(jìn)行計(jì)算后得到以下結(jié)論：（1）吉林省春季降水性層狀云宏觀結(jié)構(gòu)主要分為三種云型即：Ns、As op-Sc op、Astra。（2）不同云型其云中過(guò)冷水含量、云滴數(shù)密度不同，其中Ns云型的云中過(guò)冷水含量、云滴數(shù)密度最大，分別達(dá)到0．2737g／m^3、205．3個(gè)／L，其次是Asop-Sc op云層，其過(guò)冷水含量、云滴數(shù)密度分別為0．1693g／m^3、117．5個(gè)／L，過(guò)冷水含量、云滴數(shù)密度最小的云層結(jié)構(gòu)為Astra，分別為0.1054 g／m^3、98．6個(gè)／L。（3）云中過(guò)冷水含量與云底高度為負(fù)相關(guān)，與過(guò)冷層厚度為正相關(guān). （4）三種云型的云中過(guò)冷水含量、云滴數(shù)密度距0℃層高度的分布基本一致：在距0℃層高度以上400-600m高度范圍內(nèi)過(guò)冷水含量、云滴數(shù)密度達(dá)最大，之后隨著距0℃層高度的增加云中過(guò)冷水含量、云滴數(shù)密度迅速減小。（5）吉林省春季降水性層狀云的可播度為86％；三種云型的人工降水潛力有所不同，即：Ns云型潛力最大，達(dá)41．3％，其次是As op-Sc op云型潛力為28．4％，潛力最小的云型為As tra，為26．6％。

Abstract:

In 2001～2002,using American Particle Measure Systems (PMS) to make a scientific research during man-made rain enhancement operation in precipitating stratus in May~July in Jilin province,some data were obtained,after making a calculation to these data,the following conclusions were drawn:(1) the macro structure of precipitating stratus in spring in Jilin province is classified into three types : Ns,As op-Sc op and Astra. Different cloud types have different super-cooled water content and cloud droplet amount density,the super-cooled water content and cloud droplet amount density in the cloud of Ns type are the largest,they are respectively 0.2737 g/m3,205.3/L,the second is in the cloud layer of As op-Sc op,0.1693 g/m3,117.5/L,the smallest is in the cloud layer of As tra,0.1054 g/m3,98.6/L.(2)The super-cooled water content in the cloud has a negative correlation with the height of cloud base,and has a positive correlation with the thickness of super-cooled layer. (3)The super-cooled water content and cloud droplet amount density have a basically coincidence with the distribution of the distance to 0 ℃ layer height in these three types of clouds: super-cooled water content and the cloud droplet amount density are the largest in the range of 400~600 meters above 0 ℃ layer height,then super-cooled water content and the cloud droplet amount density reduce rapidly along with the increase of 0 ℃ layer height. (4)The seeding operation rate of precipitating stratus in spring in Jilin province is 86%,the rainfall enhancement potential of these three types of clouds are different,Ns is the largest,up to 41.3%,the second is As op-Sc op,about 28.4%，the smallest is As tra,26.6%.

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劉健,李茂侖,蔣彤,米長(zhǎng)樹(shù),陳知新.吉林省春季降水性層狀云基本結(jié)構(gòu)及降水潛力的初步研究.氣象科學(xué),2005,(6):609-616 Liu Jian, Li Mao Lun, Jiang Tong, Mi Changshu, Chen Zhixin. THE PRELIMINARY STUDY OF THE BASIC STRUCTURE OF PRECIPITATING STRATUS AND PRECIPITATION POTENTIAL IN SPRING IN JILIN PROVINCE. Journal of the Meteorological Sciences,2005,(6):609-616

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