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Observations of the 5‐day wave in the mesosphere and lower thermosphere
Author(s) -
Wu D. L.,
Hays P. B.,
Skinner W. R.
Publication year - 1994
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 - 10.1029/94gl02660
Subject(s) - thermosphere , mesosphere , rossby wave , atmospheric sciences , zonal and meridional , atmosphere (unit) , altitude (triangle) , latitude , geology , middle latitudes , satellite , doppler effect , universal time , atmospheric tide , climatology , ionosphere , stratosphere , geodesy , meteorology , geophysics , physics , astronomy , geometry , mathematics
The 5‐day planetary wave has been detected in the winds measured by the High Resolution Doppler Imager (HRDI) on the Upper Atmosphere Research Satellite (UARS) in the mesosphere and lower thermosphere (50–110 km). The appearances of the 5‐day wave are transient, with a lifetime of 10–20 days in the two‐year data set. The structures of selected 5‐day wave events are in generally good agreement with the (1,1) Rossby normal mode for both zonal and meridional components. A climatology of the 5‐day wave is presented for an altitude of 95 km and latitudes mainly between 40°S and 40°N.