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    Modulation of Gravity Waves by Tides as Seen in CRISTA Temperatures (2001)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: During shuttle missions STS-66 (November, 1994) and STS-85 (August, 1997) the Cryogenic Infrared Spectrometers and Telescopes for the Atmosphere (CRISTA) acquired temperature data with very high spatial resolution. These are analyzed for gravity waves (GW). The altitude range spans the whole middle atmosphere from the tropopause up to the mesopause. In the upper mesosphere tidal amplitudes exceed values of 10 K. Modulation of GW activity by the tides is observed and analyzed using CRISTA temperatures and tidal predictions of the Global Scale Wave Model (GSWM). The modulation process is identified as a tidally-induced change of the background buoyancy frequency. The findings agree well with the expectations for saturated GW and are the first global scale observations of this process.
    Keywords: Geophysics
    Type: AD-A529139 , Advances in Space Research (ISSN 0273-1177); 27; 10; 1773-1778
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Horizontal Temperature Variability in the Stratosphere: Global Variations Inferred from CRISTA Data (2001)
    In:  Other Sources
    Details
    Publication Date: 2019-08-26
    Description: In two separate orbital campaigns (November, 1994 and August, 1997), the Cryogenic Infrared Spectrometers and Telescopes for the Atmosphere (CRISTA) instrument acquired global stratospheric data of high accuracy and high spatial resolution. The standard limb-scanned CRISTA measurements resolved atmospheric spatial structures with vertical dimensions greater than or equal to 1.5 - 2 km and horizontal dimensions is greater than or equal to 100 - 200 km. A fluctuation analysis of horizontal temperature distributions derived from these data is presented. This method is somewhat complementary to conventional power-spectral analysis techniques.
    Keywords: Geophysics
    Type: AD-A526976 , Advances in Space Research; 27; 10; 1641-1646
    Format: text
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    NASA TECHNICAL REPORTS
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