2018年青海人工增雨天氣環(huán)流形勢(shì)及作業(yè)條件統(tǒng)計(jì)分析

doi:10.12306/2021jms.0022

首頁(yè) > 過(guò)刊瀏覽>2021年第41卷第5期 >703-710. DOI:10.12306/2021jms.0022

2018年青海人工增雨天氣環(huán)流形勢(shì)及作業(yè)條件統(tǒng)計(jì)分析
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                        10.12306/2021jms.0022
                    
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中圖分類號(hào):P426.5;P412.24
基金項(xiàng)目:西北區(qū)域人影建設(shè)研究（RYSY201903）；青海省自然科學(xué)基金（2021-ZJ-745）；青海省氣象局重點(diǎn)項(xiàng)目（QXZ2020-06）

Analysis of circulation situation and operating conditions for artificial precipitation enhancement in Qinghai in 2018

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對(duì)2018年飛機(jī)人工增雨作業(yè)時(shí)的77個(gè)天氣樣本進(jìn)行分析，以大氣環(huán)流形勢(shì)配合冷空氣入侵青海的不同路徑將人工增雨降水過(guò)程分為4種環(huán)流型：兩槽一脊型、東高西低型、緯向環(huán)流型、橫槽轉(zhuǎn)豎型。作業(yè)云系以層狀云和積層混合云為主；主要作業(yè)層風(fēng)速在16 m·s^-1左右；作業(yè)層主導(dǎo)風(fēng)向在230°~280°。雷達(dá)回波強(qiáng)度和雷達(dá)回波頂高在4種環(huán)流型中沒有明顯區(qū)別。衛(wèi)星反演云頂高度中東高西低型云系平均發(fā)展較深厚，緯向環(huán)流型和橫槽轉(zhuǎn)豎型中云系發(fā)展較高但并不深厚；云頂溫度最低在-40℃；最大光學(xué)厚度在13左右；過(guò)冷層厚度在2.7 km左右。云內(nèi)微觀條件中：有效粒子半徑在13 μm左右；液水路徑在東高西低型中較高在209 μm左右。

Abstract:

Based on analysis of 77 samples of artificial precipitation operation in 2018, the artificial precipitation process was divided into four types of atmospheric circulation patterns based on the paths of the cold air intrusioninto Qinghai under certain atmospheric circulation situation:‘Two-trough and one-ridge’, ‘East-high and west-low’, ‘Zonal circulation’ and ‘Transverse to vertical’. The cloud system for operation was dominated by stratiform cloud and stratiform mixed cloud. The wind speed of the main operating layer was about 16 m·s^-1, andthe dominant wind direction was between 230 and 280 degrees. The differencesof radar echo intensity and radar echo ceiling height was negligible among the four circulation patterns. Satellite-retrieved cloud development were relatively deep,and cloud top height is relatively high in the Middle East and low in the west. The cloud top height of the cloud with ‘zonal circulation’ type and the ‘transverse to vertical’ type was relatively high but the development of cloud systems was not deep. The lowest cloud top temperature was -40℃. The maximum optical thickness was about 13. The thickness of the supercooled layer was about 2.7 km. From the perspective of cloud microphysics, the effective particle radius was around 13 microns, andthe liquid water path of clouds in the ‘East-high and west-low’ type was about 209 microns.

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張玉欣,田建兵,張鵬亮,薛麗梅,康曉燕.2018年青海人工增雨天氣環(huán)流形勢(shì)及作業(yè)條件統(tǒng)計(jì)分析.氣象科學(xué),2021,41(5):703-710 ZHANG Yuxin, TIAN Jianbing, ZHANG Pengliang, XUE Limei, KANG Xiaoyan. Analysis of circulation situation and operating conditions for artificial precipitation enhancement in Qinghai in 2018. Journal of the Meteorological Sciences,2021,41(5):703-710

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收稿日期:2020-08-04
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