Accession Number : AD0638150

Title :   INVESTIGATION OF STRATOSPHERE WINDS AND TEMPERATURES FROM ACOUSTICAL PROPAGATION STUDIES.

Descriptive Note : Geophysical Research papers.

Corporate Author : AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

Personal Author(s) : Crary,A. P.

Report Date : JUN 1950

Pagination or Media Count : 32

Abstract : An investigation of the velocities of compressional waves in the region 30 to 60 kilometers above sea level has been made by means of sound propagation tests. From an analysis of these tests knowledge of stratosphere winds and temperatures are obtained. A separation of the temperature and wind effects is made possible by variations in the distances and azimuths of the recording sites from the source of the waves. Results of summer tests in the Canal Zone, Bermuda, and Alaska and of a winter test in Alaska, together with some results of incomplete tests on the East Coast of the United States and in New Mexico, are presented. Temperatures were found to be less than those reported in earlier acoustical studies where winds were assumed to be negligible. The heights of the high-temperature layer varied between 50 and 60 kilometers, being maximum in the high-latitude winter months. Easterly winds were found during the summer months for all latitudes, with minimum values in Alaska; and high westerly winds were found in Alaska during the winter. Diurnal effects are shown to have been negligible. (Author)

Descriptors :   (*SOUND, PROPAGATION), (*ATMOSPHERIC SOUNDING, *STRATOSPHERE), WIND, ATMOSPHERIC TEMPERATURE

Subject Categories : Atmospheric Physics
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE