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Title: Observations of mesospheric wind velocities. I. Gravity wave horizontal scales and phase velocities determined from spaced wind observations. II. Cross sections of power spectral density for 48-8 hours, 8-1 hours, and 1 hour to 10 min over 60-110 km for 1981

Abstract

Dual bistatic radar and the Saskatoon MF radar were used to obtain horizontal scales, phase velocities and power spectral density cross sections of upper middle atmosphere gravity waves as determined from spaced wind velocities. The wave scales averaged 60-110 km and varied from 44-210 km during the 10-100 min observation periods. The horizontal length scales varied directly with the length of the observation interval, while the phase speeds decreased as the observation interval increased. The rms velocity perturbations were about 5 m/sec. The associated vertical wavelengths were 30 and 6 km for the 10-100 min intervals. The power spectra densities obtained, when compared with similar data from previous compaigns, were found to vary on an annual basis. The spectral densities were noted to track the zero line of mean zonal velocity closely in the 10 min to 8 hr period bands. This last phenomena strongly indicates the occurrence of gravity wave mean flow interactions. 80 references.

Authors:
; ;
Publication Date:
Research Org.:
Saskatchewan Univ., Saskatoon, Canada
OSTI Identifier:
5936068
Resource Type:
Journal Article
Journal Name:
Radio Sci.; (United States)
Additional Journal Information:
Journal Volume: 20
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; MESOSPHERE; GRAVITY WAVES; EXPERIMENTAL DATA; PHASE VELOCITY; WAVELENGTHS; WIND; DATA; EARTH ATMOSPHERE; INFORMATION; NUMERICAL DATA; VELOCITY; 640200* - Atmospheric Physics

Citation Formats

Meek, C E, Reid, I M, and Manson, A H. Observations of mesospheric wind velocities. I. Gravity wave horizontal scales and phase velocities determined from spaced wind observations. II. Cross sections of power spectral density for 48-8 hours, 8-1 hours, and 1 hour to 10 min over 60-110 km for 1981. United States: N. p., 1985. Web. doi:10.1029/RS020i006p01363.
Meek, C E, Reid, I M, & Manson, A H. Observations of mesospheric wind velocities. I. Gravity wave horizontal scales and phase velocities determined from spaced wind observations. II. Cross sections of power spectral density for 48-8 hours, 8-1 hours, and 1 hour to 10 min over 60-110 km for 1981. United States. doi:10.1029/RS020i006p01363.
Meek, C E, Reid, I M, and Manson, A H. Sun . "Observations of mesospheric wind velocities. I. Gravity wave horizontal scales and phase velocities determined from spaced wind observations. II. Cross sections of power spectral density for 48-8 hours, 8-1 hours, and 1 hour to 10 min over 60-110 km for 1981". United States. doi:10.1029/RS020i006p01363.
@article{osti_5936068,
title = {Observations of mesospheric wind velocities. I. Gravity wave horizontal scales and phase velocities determined from spaced wind observations. II. Cross sections of power spectral density for 48-8 hours, 8-1 hours, and 1 hour to 10 min over 60-110 km for 1981},
author = {Meek, C E and Reid, I M and Manson, A H},
abstractNote = {Dual bistatic radar and the Saskatoon MF radar were used to obtain horizontal scales, phase velocities and power spectral density cross sections of upper middle atmosphere gravity waves as determined from spaced wind velocities. The wave scales averaged 60-110 km and varied from 44-210 km during the 10-100 min observation periods. The horizontal length scales varied directly with the length of the observation interval, while the phase speeds decreased as the observation interval increased. The rms velocity perturbations were about 5 m/sec. The associated vertical wavelengths were 30 and 6 km for the 10-100 min intervals. The power spectra densities obtained, when compared with similar data from previous compaigns, were found to vary on an annual basis. The spectral densities were noted to track the zero line of mean zonal velocity closely in the 10 min to 8 hr period bands. This last phenomena strongly indicates the occurrence of gravity wave mean flow interactions. 80 references.},
doi = {10.1029/RS020i006p01363},
journal = {Radio Sci.; (United States)},
number = ,
volume = 20,
place = {United States},
year = {1985},
month = {12}
}