HR: 0800h
AN: A21E-0793    [Abstracts]
TI: Mountain Wave Propagation Across the Tropopause
AU: * Woods, B K
EM: bryan.woods@yale.edu
AF: Yale University, Dept. of Geology & Geophysics P.O. Box 208109, New Haven, CT 06520-8109, United States
AU: Smith, R B
EM: ronald.smith@yale.edu
AF: Yale University, Dept. of Geology & Geophysics P.O. Box 208109, New Haven, CT 06520-8109, United States
AU: Jensen, J
EM: jbj@ucar.edu
AF: NCAR/UCAR, 1850 Table Mesa Dr, Boulder, CO 80305, United States
AU: Cooper, W A
EM: cooperw@ucar.edu
AF: NCAR/UCAR, 1850 Table Mesa Dr, Boulder, CO 80305, United States
AU: Doyle, J D
EM: doyle@nrlmry.navy.mil
AF: Naval Research Lab, Marine Meteorology Division 7 Grace Hopper Ave, Monterey, CA 93943-5502, United States
AU: Jiang, Q
EM: jiang@nrlmry.navy.mil
AF: UCAR, Naval Research Lab 7 Grace Hopper Ave, Monterey, CA 93942-5502, United States
AU: Grubisic, V
EM: grubisic@dri.edu
AF: Desert Research Institute, Division of Atmospheric Sciences 2215 Raggio Parkway, Reno, NV 89512-1095, United States
AB: Using observations from the NSF/NCAR Gulfstream V and U. Wyoming King Air research aircraft in the Terrain- Induced Rotor Experiment, wave properties over the Sierra Nevada are analyzed for six cases with cross-barrier flow. Energy and momentum fluxes were compared to those predicted by existing theory and idealized model simulations. The Eliassen-Palm linear relation between momentum (MF) and energy flux (EF) was verified using the aircraft data. Spatial, Fourier, and wavelet techniques are employed to document spatial and temporal wave evolution and associated vertical fluxes. In one case (RF10), MF was found to vary as a function of height. The Eliassen- Palm relation stipulates that MF should be independent of height and this vertical variation of MF appears to be a violation of existing theory for a steady, upward propagating wave. In the case of RF10, systematically reversed momentum and energy fluxes were consistently found in the stratosphere above 12km. Spectral techniques also suggest the possible presence of a fluxless trapped wave riding just above the tropopause. Results are compared to known and modeled solutions for vertically propagating mountain waves. Secondary wave generation is examined as a possible result of wave breaking and interactions with the tropopause inversion layer.
DE: 3252 Spatial analysis (0500)
DE: 3255 Spectral analysis (3205, 3280)
DE: 3285 Wave propagation (0689, 2487, 4275, 4455, 6934)
DE: 3329 Mesoscale meteorology
DE: 3362 Stratosphere/troposphere interactions
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting