Initialization of a 5-level global atmospheric general circulation model using a staggered, spherical, sigma coordinate system.
McCollough, James Michael
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Initialization of a five-level global baroclinic primitive equation model was examined using real data. Experiments were conducted using a Robert (1965) time frequency filter, Euler backward time integration, and an iterative initialization scheme to determine the effect of each on the generation of inertial-gravity waves resulting from an improper balance between initial mass and wind fields. In addition, a global sigma-surface linear balance equation solution was examined for the purpose of determining initial winds. Although all forecast fields were meteorological, certain undesirable features were generated in the polar and equatorial regions.