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Frequency spectra of wind velocity and temperature fluctuations observed with the MU Radar‐RASS
Author(s) -
Yamamoto Y.,
Tsuda T.,
Adachi T.
Publication year - 1996
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/96gl03374
Subject(s) - spectral line , wind speed , troposphere , gravity wave , hydrostatic equilibrium , radar , atmospheric sciences , physics , altitude (triangle) , environmental science , geology , meteorology , gravitational wave , computational physics , astrophysics , geometry , telecommunications , mathematics , quantum mechanics , astronomy , computer science
MU radar‐RASS observations were conducted on July 28–31, 1994 at Shigaraki, Japan (35°N, 136°E), to determine the detailed time variations of all three wind components and virtual temperature in the lower troposphere. We discuss their frequency spectra in comparison with a theoretical model of gravity waves. Assuming hydrostatic equilibrium, we also estimated the vertical wind velocity from the time derivative of temperature variations at each altitude. We found that the frequency spectra of the derived vertical wind were more consistent with a gravity wave model than those spectra calculated from direct measurements of the vertical wind.