Application of Diagnostic Analysis of Moist Potential Vorticity for the Typhoon Remote Precipitation in Henan
Abstract：By using moist potential vorticity theory, the article analyzed two cases of typhoon remote precipitation that happened in Henan and discussed the formative relationship between moist potential vorticity and typhoon remote precipitation. The results show that the moist potential vorticity characteristics were in favor of severe precipitation in Henan. There was good relationship between abnormal rainstorm＇ s development and moist potential vorticity＇ s change. The abnormal area of moist potential vorticity was corresponding to the severest precipitation. The positive value area of ζMPV1 in upper troposphere （the vertical component of moist potential vorticity） had interaction with the negative value area of ζMPV2· Dry and cool air gliding from upper level joined with the high temperature and high moisture air that conveyed from south-east jet. That was easy to store up and release moist convective instability energy. That could also be in favor of severe precipitation. The moist potential vorticity theory has better prospect for diagnostic analysis of typhoon remote precipitation in Henan.
Keywords：moist potential vorticityvertical componenthorizontal componenttyphoon remote rainstormbaroclinic instability
Publication Date：2012-03-14
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：8( 25-32 )