Non-migrating diurnal tides as measured by the TIMED Doppler interferometer: Preliminary results

J. Oberheide, Q. Wu, D. A. Ortland, T. L. Killeen, M. E. Hagan, R. G. Roble, R. J. Niciejewski, W. R. Skinner

Research output: Contribution to journalArticlepeer-review

Abstract

Preliminary meridional wind data from the TIMED Doppler interferometer (TIDI) onboard the TIMED satellite are analyzed for non-migrating diurnal tides. Tidal definitions are given for the most pronounced westward, eastward and standing oscillations (w2, e3, s0). The analysis interval is March 2002 to June 2004 and covers the altitude range 85-105 km. Monthly tidal wind fields from 40°S to 40°N are presented. TIDI tides compare favorably with previously reported 95 km HRDI results. Non-migrating diurnal tidal wind speeds larger than 30 m/s are observed thus emphasizing the important role of non-migrating tides in middle atmosphere coupling. A comparative analysis with the global scale wave model (GSWM) and the thermosphere-ionosphere-mesosphere- electrodynamics general circulation model (TIME-GCM) indicates that both latent heat release in the tropical troposphere and non-linear planetary wave/migrating tide interaction are important sources of non-migrating tides in the mesosphere and lower thermosphere.

Original languageEnglish (US)
Pages (from-to)1911-1917
Number of pages7
JournalAdvances in Space Research
Volume35
Issue number11
DOIs
StatePublished - 2005
Externally publishedYes

Keywords

  • GSWM
  • MLT region
  • Non-migrating tides
  • TIDI
  • TIME-GCM
  • TIMED

ASJC Scopus subject areas

  • Aerospace Engineering
  • Astronomy and Astrophysics
  • Geophysics
  • Atmospheric Science
  • Space and Planetary Science
  • General Earth and Planetary Sciences

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