摘要
利用1°×1°的NCEP/NCAR格点分析资料和中国区域站点观测降水资料,在分析2003年江淮流域梅雨期降水及大尺度环流特征的基础上,利用包含降水质量强迫效应的湿位涡方程,阐明在暴雨系统中引起的强降水会造成湿位涡异常.对2003年引起江淮流域暴雨的对流系统进行的湿位涡诊断分析表明,对流层中低层的湿位涡异常区与降水区域有很好的对应关系,可利用湿位涡的异常分布预测降水未来可能的分布形势和走向.
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 heavy Meiyu 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.
出处
《中国科学院研究生院学报》
CAS
CSCD
2005年第6期712-718,共7页
Journal of the Graduate School of the Chinese Academy of Sciences
基金
国家自然科学基金项目(40405007
40275015)
国家重点基础研究发展规划项目(2004CB418302)
科技部社会公益专项(2002DIB10100)共同资助
关键词
梅雨
湿位涡异常
质量强迫
Meiyu, moist potential vorticity, mass forcing
