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  • 1975-1979  (3)
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  • 1
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    The intertropical convergence zone experiment: Background and summary (1979)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: The Intertropical Convergence Zone Experiment (ITCZ) was the first in an anticipated series of observational programs designed to explore the nature and magnitude of troposphere-stratosphere exchange processes. The overall meteorological background and motivations for a measurement program in the ITCZ are summarized and the nature of the field experiments are briefly described.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Ames Res. Center The 1977 Intertrop. Convergence Zone Expt.; p 1-4
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Equatorial wave-mean flow interaction - A numerical study of the role of latitudinal shear (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: A time-dependent primitive equation model for an equatorial channel is used to assess the interaction of equatorial Kelvin and mixed Rossby-gravity waves with the mean flow. The proposed model involves a semiimplicit time-differencing scheme and a finite-difference grid in the meridional plane. It is shown that forced equatorial waves interact with mean flow to produce equatorial jets characterized by downward-moving westerly (Kelvin wave forcing) and easterly (mixed Rossby-gravity wave forcing) shear zones, respectively. For parameters characteristic of the observed waves in the equatorial stratosphere, the wave-mean flow interaction process always reduces the amplitude of any initial cross-equatorial mean wind shear. The mean flow profile tends to become symmetric about the equator as the interaction process continues.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Journal of the Atmospheric Sciences; 36; June 197
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Middle atmosphere project. A semi-spectral numerical model for the large-scale stratospheric circulation (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The complete model is a semispectral model in which the longitudinal dependence is represented by expansion in zonal harmonics while the latitude and height dependencies are represented by a finite difference grid. The model is based on the primitive equations in the log pressure coordinate system. The lower boundary of the model domain is set at the 100 mb level (i.e., near the tropopause) and the effects of tropospheric forcing are included in the lower boundary condition. The upper boundary is at approximately 96 km, and the latitudinal extent is either global or hemispheric. The basic differential equations and boundary conditions are outlined. The finite difference equations are described. The initial conditions are discussed and a sample calculation is presented. The FORTRAN code is given in the appendix.
    Keywords: GEOPHYSICS
    Type: NASA-CR-158653 , REPT-1
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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