Accession Number : AD0283294

Title :   THE VERTICAL DISTRIBUTION OF WATER VAPOR OVER HYDERABAD, INDIA, AND COMPARISON WITH MID-LATITUDE DISTRIBUTION

Descriptive Note : Interim rept.

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : MASTENBROOK,H.J.

Report Date : 13 AUG 1962

Pagination or Media Count : 14

Abstract : Three stratospheric soundings over India with a balloon-borne frost-point hygrometer in April 1961 provided data for the vertical distribution of water vapor at low latitudes. The composite distribution shows a mixing ratio minimum of 0.003 g/kg, a condition of near saturation in a 5000-ft interval which includes the tropopause. Above this level, the mixing ratio increases with altitude and at the 20-mb level becomes six times greater than the minimum value. The Hyderabad potential temperature vs mixing ratio distributions for levels above 100-mb is in substantial agreement with mid-latitude distributions for April and June of the previous year. At levels between 200 and 100 mb, the Hyderabad distribution (April) agrees closely with the mid-latitude distribution for June; however, the April midlatitude distribution showed substantially lower potential temperatures than the Hyderabad distribution for corresponding values of mixing ratio. Monthly mean potential temperature-mixing ratio distributions show a seasonal shift to lower potential temperatures in winter, and daily distributions for spring and fall show a monthly range of potential temperature shift for corresponding values of mixing ratio which is comparable to the annual range of the monthly means. Day-to-day shifts of the potential temperature for the potential temperature-mixing ratio distributions are evidence of mixing ratio gradients along potential temperature surfaces. (Author)

Descriptors :   *STRATOSPHERE, *WATER VAPOR, HYGROMETERS, MEASUREMENT, VERTICAL INDICATORS

Distribution Statement : APPROVED FOR PUBLIC RELEASE