Accession Number : AD0602851

Title :   TROPICAL UPPER AIR STUDIES. PART I. PERSISTENCE OF THE DAILY STRATOSPHERIC WINDS IN THE TROPICS. PART II. LONG-PERIOD WIND FLUCTUATIONS IN THE TROPICS.

Descriptive Note : Final rept. for 30 Mar 62-30 Mar 64,

Corporate Author : GENERAL MILLS INC MINNEAPOLIS MINN

Personal Author(s) : Belmont,A. D. ; Shen,W. C. ; Dartt,D. G.

Report Date : 01 APR 1964

Pagination or Media Count : 133

Abstract : The persistence of tropical 50 mb daily wind direction and speed along with the daily zonal component was computed to determine the interval over which a wind observation may be regarded as 'independent'. Monthly means of the zonal component were determined using only 'independent observations' and then compared to monthly means based on all available data. Long period fluctuations of the stratospheric zonal winds in the tropics were examined to describe variations in the observed monthly mean patterns. The quasi-biennial and annual fluctuations account for practically all the observed wind variability; the meridional and vertical variation of the amplitudes as well as the difference in phase propagation downward of each of these two components cause the complex interference patterns that are observed with time at various subtropical and tropical stations. (Author)

Descriptors :   (*TROPICAL REGIONS, WIND), (*WIND, TROPICAL REGIONS), (*STRATOSPHERE, TROPICAL REGIONS), METEOROLOGICAL PHENOMENA, METEOROLOGICAL CHARTS, ATMOSPHERIC MOTION, WEATHER FORECASTING, ATMOSPHERIC TEMPERATURE, TROPOSPHERE, VELOCITY, OSCILLATION, ENERGY, HARMONIC ANALYSIS, CORRELATION TECHNIQUES, STOCHASTIC PROCESSES, SPECTROSCOPY

Distribution Statement : APPROVED FOR PUBLIC RELEASE