Accession Number : AD0664063

Title :   AN INVESTIGATION ON THE PREDICTION OF STRONG WINDS ASSOCIATED WITH COLD FRONTS IN THE YUPEH REGION (NORTHERN HONAN) IN SPRING.

Descriptive Note : Research translation,

Corporate Author : EMMANUEL COLL BOSTON MASS ORIENTAL SCIENCE LIBRARY

Personal Author(s) : Zhu,Zhong-ji ; Hu,Xue-mei ; Chen,Zeng-Fu ; Ji,Nai-fu ; Xu,Hong-wen

Report Date : SEP 1967

Pagination or Media Count : 28

Abstract : This paper presents an analysis of the occurrence of strong winds over the region of Kaifeng, Chengchow and Hsinhsiang in Honan Province with respect to orographic conditions. The effect of pressure gradient, the characteristics of the low-level frontal zone and the turbulent exchange on wind speed and the relationship between the flow pattern ahead of the front and the wind speed behind it were also discussed. The synoptic situations associated with the occurrence of strong winds accompanying a cold front over the Yupeh region were classified into three main types, W, N and E, and other subsidiary categories on the basis of synoptic climatology and the trajectories of the cold air. The characteristics of each type of strong winds and the evolution of the associated synoptic process were studied in detail for the formulation of an empirical method to forecast the occurrence of strong winds. The method evolved was then tested for the region under operational conditions during March - May 1964, and the accuracies were found to be 87.5% for Type W, 91.7% for Type N and 40% for Type E.

Descriptors :   (*WIND, CHINA), (*AIR MASS ANALYSIS, CHINA), BAROMETRIC PRESSURE, ATMOSPHERIC MOTION, WEATHER FORECASTING, TURBULENCE, TROPICAL CYCLONES, METEOROLOGICAL CHARTS, PERIODIC VARIATIONS

Subject Categories : Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE