Open AccessGSWM‐98: Results for migrating solar tides
Author(s) -
Hagan M. E.,
Burrage M. D.,
Forbes J. M.,
Hackney J.,
Randel W. J.,
Zhang X.
Publication year - 1999
Publication title -
journal of geophysical research: space physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/1998ja900125
Subject(s) - thermosphere , mesosphere , stratosphere , microwave limb sounder , atmospheric sciences , atmosphere (unit) , troposphere , environmental science , occultation , gravity wave , climatology , geology , ionosphere , meteorology , gravitational wave , physics , geophysics , astronomy
We report on new global‐scale wave model (GSWM) predictions for the migrating solar tide in the troposphere, stratosphere, mesosphere and lower thermosphere. The model revision, hereafter GSWM‐98, includes an updated gravity wave (GW) stress parameterization and modifications to the background atmosphere based on 6‐year monthly averaged Upper Atmosphere Research Satellite (UARS) climatologies. UARS Halogen Occultation Experiment and Microwave Limb Sounder ozone data are used to define the strato‐mesospheric tidal source, while GSWM‐98 background winds are based on UARS High Resolution Doppler Interferometer (HRDI) zonal mean zonal wind data. We quantify and interpret differences between previous diurnal and semidiurnal predictions, hereafter GSWM‐95, and GSWM‐98 results. The revised GW stress parameterization accounts for the most profound changes and leads to seasonal variability predictions that are consistent with diurnal amplitudes observed in the upper mesosphere and lower thermosphere. Unresolved differences between HRDI and other wind climatologies significantly affect MLT tidal predictions.