強(qiáng)雨雪天氣成因及相態(tài)轉(zhuǎn)換特征分析

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中圖分類號 S166.8 文獻(xiàn)標(biāo)識碼A 文章編號 1007-7731（2025）16-0093-04

DOI號10.16377/j.cnki.issn1007-7731.2025.16.020

AbstractThecausesof the heavyrainandsnow weather that occurrd in Chifeng City，Inner Mongolia Autonomous Region from April 27 to 29，2024，as wellas the characteristics of precipitation phase changes during this processand suggestions for agricultural production were analyzed，using observation data from Tianqing （a meteorological big data cloud platform），ERA5 reanalysis data，and MICAPS conventional data，from the perspectives of circulation situation and water vapor conditions.The results showed that this weather process presented acomplex phase transition fromrain tosleet to snow，with characteristics such aslongduration，wide impactrange，and largecumulative precipitation.In termsof circulationsituation，thecouplingof highand low-level jets，combined withthelow-level vortex shearline，surfaceinvertedtrough，and frontal zone，providedfavorableconditions forthe heavyrain and snow.In terms of water vapor conditions，the 7OO hPa southwest jet continuously transported water vapor，and thespecific humidity in thesouthernregionreached4g/kg，meting the watervaporstandardfor heavy snow.In termsof precipitation phase，the formation of a near-surface cold pad and changes in temperature stratification dominated the precipitation phase transition，and the thicknessand intensityof the melting layer hadan obvious impact on the phase transition.Inresponse to the heavyrain andsnow weather，itis suggested thatfarmers reasonablyadjustthe temperature and humidityin greenhouses，agriculturalareas strengthen field management，anddoagood job incold protectionand heat preservation. This study provides a reference for relevant weather analysis.

Keywordsrain-snow transition; precipitation phase; circulation situation; agricultural production

雨雪等災(zāi)害性天氣對農(nóng)業(yè)生產(chǎn)、交通運(yùn)輸?shù)壬鐣?jīng)濟(jì)活動構(gòu)成直接威脅，其引發(fā)的道路結(jié)冰、城市內(nèi)澇等問題對公共安全與生態(tài)系統(tǒng)穩(wěn)定性產(chǎn)生不利影響。（剩余5148字）