NDLI: A study of the extended-range forecasting problem blocking

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A study of the extended-range forecasting problem blocking

Content Provider	NASA Technical Reports Server (NTRS)
Author	Chen, T. C. Marshall, H. G. Shukla, J.
Copyright Year	1981
Description	Wavenumber frequency spectral analysis of a 90 day winter (Jan. 15 - April 14) wind field simulated by a climate experiment of the GLAS atmospheric circulation model is made using the space time Fourier analysis which is modified with Tukey's numerical spectral analysis. Computations are also made to examine how the model wave disturbances in the wavenumber frequency domain are maintained by nonlinear interactions. Results are compared with observation. It is found that equatorial easterlies do not show up in this climate experiment at 200 mb. The zonal kinetic energy and momentum transport of stationary waves are too small in the model's Northern Hemisphere. The wavenumber and frequency spectra of the model are generally in good agreement with observation. However, some distinct features of the model's spectra are revealed. The wavenumber spectra of kinetic energy show that the eastward moving waves of low wavenumbers have stronger zonal motion while the eastward moving waves of intermediate wavenumbers have larger meridional motion compared with observation. Furthermore, the eastward moving waves show a band of large spectral value in the medium frequency regime.
File Size	12747050
Page Count	219
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19810014127
Archival Resource Key	ark:/13960/t9m37nd18
Language	English
Publisher Date	1981-03-01
Access Restriction	Open
Subject Keyword	Meteorology And Climatology Atmospheric Circulation Climatology Fourier Transformation Spectrum Analysis Weather Forecasting Mathematical Models Frequencies Wind Profiles Kinetic Energy Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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