Abnomaly Characteristics of July 2013 Precipitation in Changzhi and Its Analysis of Circulation Background
In this paper,using July 2013 Changzhi 11 counties monthly data,24 h precipitation,from observation stations and township automatic rainfall stations,data,historical data,and the NCEP reanalysis data,monthly precipitation for Changzhi in July,precipitation days,the number of storm days,storm rainfall process,maximum rainfall intensity and circulation background were analyzed.The results showed that:the city in July average rainfall was 389.4 mm,compared to the same period of the calendar year (127.4 mm) was 262.0 mm (206％) more,the precipitation of the city's 11 counties observation stations were all the maximum precipitation since meteorological records; July the city counties observatory storm terminus times were 26,which was 2.2 times of storm station annual maximum,the city's townships automatic rainfall stations rainstorm terminus times were 47,was 4 times of storm station annual maximum.Its circulation features was:(1) the Eurasian high latitudes west low to east high abnormul distribution,polar vortex located near the center of the pole,compared to the same period was a little bit stronger.(2) the strength of the western part of the western Pacific subtropical compared to the same period a bit stronger.(3) the monsoon trough near 85° E,affecting the Indian peninsula and the Bay of Bengal area,compared to the same period a little bit stronger.
NETL
NSTL
万方数据
维普
