ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Archive > Volume 33 Issue 10 > 2007,33(10):45-51. DOI:10.7519/j.issn.1000-0526.2007.10.007 Prev Next
Temporal and Spatial Mesoscale Characteristics of Moisture Potential Vorticity of Shear Line Heavy Rain
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Abstract:
By using the mesoscale numerical model MM5 V3.6, a successful simulati on is made for heavy rain event in the central and southern parts of Shandong Pr ovince on September 19-21, 2005. And the moist potential vorticity of the heavy rain is analyzed by using high resolution simulation result. The results indicat e that the stiff moist isentopes excite the development of moist slantwise vorti city and occurrence of heavy rain. A diagnosis of moisture potential vorticity i s made to show its temporal and spatial mesoscale characteristics. The results s how that the development of heavy rain is closely related to the temporal and sp atial variations of moisture potential vorticity. The heavy rain occurs in the i soline dense section of the negative MPV1 and positive MPV2, and the rain center lies in the convective instable section in the front of the negative MPV1 cente r at 850hPa.
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