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Diagnosis Analysis of One Cold Airflow Snowfall in Shandong Peninsula
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作者 LI Bing-wen 1,LI Jun 2,WANG Qing-hua 1,YANG Kun 1 1.Linyi Meteorological Bureau in Shandong Province,Linyi 276004,China 2.Cangshan Meteorological Bureau in Shandong Province,Cangshan 277700,China 《Meteorological and Environmental Research》 CAS 2011年第11期34-36,共3页
[Objective]One cold airflow snowfall in Shandong Peninsula was analyzed.[Method] Using conventional weather observation data,the NCEP /NCAR 1° ×1° grid point by 6 h in data analysis,the synoptic weather... [Objective]One cold airflow snowfall in Shandong Peninsula was analyzed.[Method] Using conventional weather observation data,the NCEP /NCAR 1° ×1° grid point by 6 h in data analysis,the synoptic weather dynamics principle and diagnosis analysis method,the cold airflow snowfall in Shandong Peninsula on December 4,2008 to 6 th was analyzed and summarized.[Result]The results showed that the cold deep groove of large scale circulation form caused the cold airflow snowfall in Shandong Peninsula.While the 850 hPa mistral wind strengthened,cold airflow snow in Shandong Peninsula will be strengthened.During the eruption of snowstorm,the relative humidity from 925 to 750 hPa was larger than 90%.The area formed by 90% relative humidity line corresponded with the period of heavy snowfall.The changes of relative humidity line reflected the changes of warm and wet air transmitting to the higher place.The more warm and wet air being sent to the upper air,the more conductive to the formation of cold airflow snowfall in Shandong Peninsula.The cold airflow snowfall had distinct temporal and spatial distribution characteristics and corresponded with the vertical increasing movement zone.[Conclusion]The study provided reference for the preciseness of short term and incoming report of cold airflow snowfall in Shandong Peninsula. 展开更多
关键词 cold airflow snowfall Shandong Peninsula Relative humidity Ascending motion China
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