一次飛機(jī)播云的微物理效應(yīng)分析

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一次飛機(jī)播云的微物理效應(yīng)分析
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中圖分類號(hào):P414.2
基金項(xiàng)目:國家科研院所社會(huì)公益研究專項(xiàng)資金項(xiàng)目 (2 0 0 1DIB10 0 84 )，”十五”國家科技攻關(guān)重大計(jì)劃項(xiàng)目(2 0 0 1BA6 10A 0 6 0 9)資助

THE STUDIES ON THE MICROPHYSICAL CHARACTERISTICS OF AN AIRCRAFT CLOUD SEEDING

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根據(jù)1995年6月29日對(duì)遼寧省一次層狀云降水過程的飛機(jī)探測(cè)資料，對(duì)人工增雨催化作業(yè)前后各高度層云的含水量、云雨滴數(shù)密度、譜型等微物理參量進(jìn)行了分析研究。結(jié)果表明：作業(yè)云層(高度：4．0～5．5km，溫度：-4．5～-13．8℃)的云水含量約為0．02～0．03g／m^3，是整個(gè)云體中最大的，但冰雪晶相對(duì)較少，特別是5km以上云層，冰晶粒子只有1000～2000m，因此對(duì)這一云層作業(yè)是適宜的。作業(yè)后在作業(yè)高度層產(chǎn)生了大量冰晶，由于冰晶和過冷云滴同時(shí)存在，導(dǎo)致小云滴的數(shù)密度由34．38cm^-3減少到8．9

Abstract:

Based on the PMS data of an artificial precipitation in a stratiform cloud system in Liaoning Province on June 29,1995, the difference between seeded and unseeded clouds' microphysical characteristics is studied, such as the liquid water content in the clouds, the concentrations of the cloud droplet and the rain drop or the snow crystal, the vertical variation of the cloud particle spectra with height, etc.. The results indicate that the liquid water content at the height about the seeding layer (height: 4.0～5.5 km, temperature: -4.5～ -13.8 ℃ ) is 0.02～0.03 g/m3, the maximum of this measured clouds. The concentration of the ice crystal only has 1 000～2 000 m-3. So seeding this layer is feasible. After seeding a lot of ice crystals at the seeding layer are produced. The ice crystals and the super-cooled cloud droplets coexist in the layer at the same time, so the concentration of the cloud droplet decreased from 34.38 cm-3 to 8.97 cm-3, super-cooled liquid water content decreased from 0.015 g/m3 to 0.005 g/m3. And the concentration of the ice (or snow) crystals increased from 618 m-3 to 2267 m-3, water content increased from 0.10 g/m3 to 0.17 g/m3. The cloud particle spectra can also be changed differently with height. The effect of seeding AgI to stratiform cloud on the microphysical structure is obvious.

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周德平,宮福久,高建春,王吉宏,李子華.一次飛機(jī)播云的微物理效應(yīng)分析.氣象科學(xué),2004,(4):405-412 Zhou Deping, Gong Fujiu, Wang Jihong, Li Zihua, Gao Jianchun. THE STUDIES ON THE MICROPHYSICAL CHARACTERISTICS OF AN AIRCRAFT CLOUD SEEDING. Journal of the Meteorological Sciences,2004,(4):405-412

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收稿日期:2003-09-11
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