Accession Number : AD0288139

Title :   STRATOSPHERIC TEMPERATURE VARIATION OVER THE TROPICAL PACIFIC

Corporate Author : HAWAII INST OF GEOPHYSICS HONOLULU

Personal Author(s) : DE LA CRUZ,HUGO

Report Date : AUG 1962

Pagination or Media Count : 1

Abstract : Temperature variations in the lower stratosphere over the tropical Pacific were studied in detail. Seasonal temperature maps for the 100, 50, and 25 mb levels were drawn for the period 1956 through 1959. Monthly temperature variations along the meridians 140 and 170 degrees E were studied. Charts of the annual variation of average temperatures were made for s l c d s ations. Time sections of the temperature fieldAND WINDS ALONG THE TWO SELECTED MERIDIVELS 150 TO 25 MB. Results indicate that there is a seasonal variation of temperature with minimum temperatures occurring during January or February in the lower equatorial stratosphere. Over the equatorial areas, there appears to be some relationship between stratospheric temperature variations and zonal wind reversals at 50 mb. Harmonic analysis reveals that, at 50 and 25 mb levels over thns were compared. Harmonic analysis on the temperature data of several stations was done for levels 150 to 25 mb. Results indicate that there is a seasonal variation of temperature with minimum temperatures occurring during January or February in the lower equatorial stratosphere. Over the equatorial areas, there appears to be some relationship between stratospheric temperature variations and zonal wind reversals at 50 mb. Harmonic analysis reveals that, at 50 and 25 mb levels over the equatorial Pacific, the period of the temperature fluctuation is dominated by a 26- or 24-month period and an annual period, but at 100 mb the annual period is dominant. (Author)

Descriptors :   *METEOROLOGY, *STRATOSPHERE, ATMOSPHERES, METEOROLOGICAL CHARTS, TEMPERATURE, TROPICAL REGIONS, WIND

Distribution Statement : APPROVED FOR PUBLIC RELEASE