内蒙古东南部回流暴雪统计分型

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Abstract The article uses routine observation data from 1951 to 2022 and NCEP/NCAR reanalysis data to conduct statistical and subtyping research on the backflow blizzard processes at 25 national stations in southeastern Inner Mongolia.The results showed that there were a total of 175 cases of blizzards during the 72 year period,with 41 cases of blizzards returning.Using the 850 hPa circulation characteristics,the backflow blizzards are divided into three types:convergence zone,highpressure bottom,and low vortex.The common feature is that the warm and humid airflow in front of the 700(or 500) hPa trough(vortex) is stacked on top of the "cold pad" formed by the northeast wind backflow below the 850(or 700) hPa layer,and when combined with the lowlevel strong front area,the blizzard area undergoes a "cold pad".The study and analysis of the physical field shows that the dynamic,water vapor,and warm and humid instability conditions of the low vortex type are very favorable for the occurrence of blizzards,followed by the high pressure bottom type,and the convergence zone type is the weakest.The research results are consistent with the statistical characteristics of the actual situation,and the 850 hPa circulation feature classification is consistent with the structural characteristics of the backflow blizzard in southeastern Inner Mongolia.

Key words： backflow blizzard circulation characteristic classification convergence zone high pressure bottom low vortex

Received: 28 August 2024

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	Articles by authors
	Jia Ning
	Liu Mengdi
	Qi Jiahui
	Yu Lu
	Wang Yibing

Cite this article:

Jia Ning,Liu Mengdi,Qi Jiahui等. Statistical classification of backflow blizzard in southeastern Inner Mongolia[J]. Meteorological Hydrological and Marine Instrument, 2025, 42(5): 24-28.

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http://www.qxswhy.com/EN/ OR http://www.qxswhy.com/EN/Y2025/V42/I5/24

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