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CN 11-2282/P
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Archive > Volume 35 Issue 2 > 2009,35(2):41-48. DOI:10.7519/j.issn.1000-0526.2009.2.007 Prev Next

Observation Analysis on a Torrential Rain Event in Liaoning Province Trigged b y a Mesoscale Jet

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    Abstract:
    Based on the data of AWS, radiosonde observations, satellite and Doppler Radar D ata, an analysis on the jets in a torrential rain event in Liaoning Province on July 31, 2008 was conducted. The results show that, a large scale southerly jet and a mesoscale southwesterly jet preexisted in the boundary layer backgr ound and in the left side of latter a southwestnortheast mesoβ cloud cluste r band caused the heavy precipitation directly. The further analysis indicates tha t the mesoscale boundary layer southwesterly jet was near to the high level je t in direction and speed. The bishear pattern wind field trigged the unstable d e velopment of vortex Rossby gravity wave in the left side of the boundary jet. It gave birth to the mesoβ cloud cluster band.

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