The Analysis of Wind and Sandstorm Precipitation Weather Influenced by the Northwestern Airflow on March 21-22,2022 in Golmud
An analysis was performed based on the date of high-altitude,ground-based,and numerical models,regarding the wind and dust storm and precipitation weather processes influenced by the northwestern airstream in Golmud on March 21-22 in 2022.The results show that:(1)This is an early spring wind and dust storm and precipitation weather event in Golmud,with widespread and strong winds,and dust storms were localized,short-lived,and intense.Precipitation was mainly concentrated on the night of March 21st,with precipitation and maximum rainfall intensity at the Golmud station exceeding the historical maximum in March.(2)A strong westerly jet stream was present at 200 hPa altitude(＞60m/s)with significant momentum convergence,and a strong wind speed band(20-32m/s)at 500hPa,with a cold trough over Golmud and saturated moisture due to water vapor from the western system.(3)Cold fronts moved into the Qaidam Basin,triggering ascending motion through mesoscale convergence lines,providing dynamic conditions for wind and precipitation events.The unique topography of the Qaidam Basin facilitated sand sources.(4)The CMA-GFS model showed relative stability in forecasts for 12-hour and 24-hour periods,with slightly southerly flow patterns and weaker primary systems.The wind field was stronger,and the precipitation areas and intensity were better predicted by CMA-3KM than CMA-GFS.
Wind and dust stormsPrecipitationWeather processesGolmud
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