Physics
Scientific paper
Oct 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004jgrd..10920103e&link_type=abstract
Journal of Geophysical Research, Volume 109, Issue D20, CiteID D20103
Physics
75
Meteorology And Atmospheric Dynamics: Waves And Tides, Atmospheric Composition And Structure: Instruments And Techniques, Meteorology And Atmospheric Dynamics: General Circulation, Meteorology And Atmospheric Dynamics: Middle Atmosphere Dynamics (0341, 0342)
Scientific paper
Temperature data obtained by the Cryogenic Infrared Spectrometers and Telescopes for the Atmosphere (CRISTA) are analyzed for gravity waves (GWs). Amplitude, phase and vertical wavelength are determined from detrended temperature height profiles. The retrieved phases are utilized to estimate the horizontal wavelengths. At 25 km altitude an equatorial maximum of horizontal wavelength with a decrease toward mid and high latitudes is found. Simultaneous estimates of both horizontal and vertical wavelengths and temperature amplitudes allow the direct calculation of GW momentum flux (MF) from satellite observations for the first time. However, histograms of horizontal wavelength distributions indicate severe undersampling which prevents the retrieval of the propagation directions of the waves, and suggests our MF estimates may be too low, particularly at the high latitudes. Therefore an empirical aliasing correction has been applied. A world map of MF at 25 km altitude shows high variability and pronounced source regions and deviates in structure from a map of GW variances at the same altitude. Results from the Warner and McIntyre GW parameterization scheme (three-part model) show better agreement with CRISTA MF estimates than with CRISTA squared GW amplitudes. Best agreement is found for low model launch levels. Large error ranges of the estimated MF values obtained in this paper could be substantially reduced by improved horizontal sampling in future satellite missions.
Alexander Michael J.
Ern Manfred
Preusse Peter
Warner Christopher D.
No associations
LandOfFree
Absolute values of gravity wave momentum flux derived from satellite data does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Absolute values of gravity wave momentum flux derived from satellite data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Absolute values of gravity wave momentum flux derived from satellite data will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-847157