The Synoptic Characters in the Eastern China During the El Nino Period

Vol.1, NO.1, 1990

Article Contents

Article Navigation > Journal of Applied Meteorological Science > 1990 > 1(1): 63-70

The synoptic characters in the eastern china during the el nino period. J Appl Meteor Sci, 1990, 1(1): 63-70.

Citation:

The synoptic characters in the eastern china during the el nino period. J Appl Meteor Sci, 1990, 1(1): 63-70.

The synoptic characters in the eastern china during the el nino period. J Appl Meteor Sci, 1990, 1(1): 63-70.

Citation:

The synoptic characters in the eastern china during the el nino period. J Appl Meteor Sci, 1990, 1(1): 63-70.

1.
1) (Academy of Meteorology Science, SMA); 2) (National Research Center for Marine Environmental Forecasts, SOA)

Abstract

The results of analyzing the 500 hPa monthly average circulation during 1951—1985 show that the occurrence of subtropical high in the El Nino period is earlier and stronger than that in the non-El Nino period. When the positive difference value of 500 hPa geopotential height between the El Nino and non-El Nino periods maintained in the western Pacific and eastern Asia, it would be unfavorable for developing the cyclonic circulation. Also, in the El Nino period, the frequencies of the cyclone and the cyclonic convergence circulation occurred in the Yellow Sea and Bohai waters of the coast of eastern China would be evidently reduced. In addition, according to the statistical data of typhoons in western Pacific and South China Sea, the typhoon in South China Sea is of very rare occurrence during the El Nino event, and the number of landing typhoon in the coast of southeastern China is reduced by 20%. Also, the landing position is located towards the south.