A Diagnosis of Moist Potential Vorticity Anomaly During Meiyu Period in 2003

doi:10.7523/j.issn.2095-6134.2005.6.009

›› 2005, Vol. 22 ›› Issue (6): 712-718.DOI: 10.7523/j.issn.2095-6134.2005.6.009

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A Diagnosis of Moist Potential Vorticity Anomaly During Meiyu Period in 2003

DENG Guo¹, ZHOU Yu-Shu², CUI Xiao-Peng²

1. National Meteorological Center, Beijing 100081, China;
2. Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China

Received:2004-09-09 Revised:2004-12-16 Online:2005-11-15

Abstract

Abstract:

By analyzing the precipitation and largescale circumfluence during the period of Meiyu in 2003,the moist potential vorticity (MPV),including the mass forcing,is used to suggest that the intensive rainfall in torrential rain system can cause anomaly of the MPV.The data diagnoses manifest that the anomaly of the MPV and the precipitation have better accordance during the period of heavyMeiyu over Changjiang river basin and Huanghe river basin in 2003.We can forecast the possible distribution and movement direction of the torrential rain system according to the impermeability of the MPV.The anomaly induced by both heat and mass forcings in the torrential rain system will be a good dynamical tracer for tracking the torrential rain region.

Key words: Meiyu, moist potential vorticity, mass forcing

CLC Number:

DENG Guo, ZHOU Yu-Shu, CUI Xiao-Peng. A Diagnosis of Moist Potential Vorticity Anomaly During Meiyu Period in 2003[J]. , 2005, 22(6): 712-718.

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A Diagnosis of Moist Potential Vorticity Anomaly During Meiyu Period in 2003

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