呼和浩特市2022-03-13/14强沙尘暴过程特例分析及预报方法研究

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Abstract Using conventional meteorological observation data and ECMCF numerical forecast products,this paper analyzes the weather system evolution and physical quantity characteristics of the strong sandstorm process that occurred in Hohhot from March 13 to 14,2022.The results show that:1)the main influence system and circulation situation cause the outbreak of this windy,sandstorm weather including 200 hPa upper-level jet momentum moving downward,500 hPa long-wave trough carrying strong cold air for eastward shift,matching the 700 hPa,850 hPa convergence shear,inverse phase superposition of temperature field and height field and intense development of Mongolia cyclone on ground.2)The pseudo equivalent potential temperature line in Hohhot is kept nearly vertical to ground.The whole layer belongs to neutral temperature stratification and the atmosphere is unstable,conducive to the blowing of sands and dusts and formation of sandstorm.3)The climate in the early period is sunny,hot,dry and rainless.Besides,the surface vegetation is sparse in spring and the western part of Inner Mongolia is dominated by deserts,all of which could create environmental conditions for the outburst of sandstorm.

Key words： strong sandstorm weather system evolution physical quantity characteristics

Received: 09 September 2022

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	Sun Shangyu

Cite this article:

Sun Shangyu. Study on special case analysis and prediction method of strong dust storm process from March 13 to 14,2022 in Hohhot[J]. Meteorological Hydrological and Marine Instrument, 2023, 40(2): 64-67.

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http://www.qxswhy.com/EN/ OR http://www.qxswhy.com/EN/Y2023/V40/I2/64

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