Analyses of hot and humid weather in Beijing city in summer and its dynamical identification

被引:38
作者
Gao, S [1 ]
Zhou, Y [1 ]
Lei, T [1 ]
Sun, JH [1 ]
机构
[1] Chinese Acad Sci, Inst Atmospher Phys, Beijing 100029, Peoples R China
来源
SCIENCE IN CHINA SERIES D-EARTH SCIENCES | 2005年 / 48卷
关键词
hot and humid weather; generalized moist potential vorticity; dynamical identification;
D O I
10.1360/05yd0387
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
The circulation, hygrothermal property and moisture transport character of typical hot and humid weather were analyzed in Beijing areas from July 30 to August 4, 2002. It was pointed out that, under the control of subtropical anticyclone which stretches to the west and north, downdraft suppresses the lifting of lower-troposphere moisture, which makes moisture keep in the lower troposphere. That is the direct reason causing hot and humid weather. Considering the non-uniformity saturated character in real atmosphere, generalized moist potential vorticity (GMPV) equation is derived by the introduction of generalized moist potential temperature concept. The analysis of GMPV shows that negative GMPV anomaly occurs in the lower troposphere. It has indicative sense to hot and humid weather. Thus, the GMPV anomaly can be utilized to identify this kind of weather and to make a short-term prediction.
引用
收藏
页码:128 / 137
页数:10
相关论文
共 22 条
[1]  
DRISCOLL DM, 1985, HDB APPL METEOROLOGY, P778
[2]  
Ertel H., 1942, Met. Z, V59, P271, DOI DOI 10.1007/BF01475602
[3]   Generation of generalized moist potential vorticity in a frictionless and moist adiabatic flow [J].
Gao, S ;
Wang, XR ;
Zhou, YS .
GEOPHYSICAL RESEARCH LETTERS, 2004, 31 (12) :L121131-4
[4]   The physiological equivalent temperature -: a universal index for the biometeorological assessment of the thermal environment [J].
Höppe, P .
INTERNATIONAL JOURNAL OF BIOMETEOROLOGY, 1999, 43 (02) :71-75
[5]  
KALKSTEIN LS, 1986, B AM METEOROL SOC, V67, P842, DOI 10.1175/1520-0477(1986)067<0842:AEOSDI>2.0.CO
[6]  
2
[7]  
Karl TR, 1997, B AM METEOROL SOC, V78, P1107, DOI 10.1175/1520-0477(1997)078<1107:TCHWHL>2.0.CO
[8]  
2
[9]  
[林朝晖 Lin Zhaohui], 2003, [气候与环境研究, Climatic and environmental research], V8, P241
[10]  
Robinson PJ, 2001, J APPL METEOROL, V40, P762, DOI 10.1175/1520-0450(2001)040<0762:OTDOAH>2.0.CO