Mathematics
Scientific paper
Sep 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991gsap.rept...41n&link_type=abstract
In NASA. Marshall Space Flight Center, NASA/MSFC FY91 Global Scale Atmospheric Processes Research Program Review p 41-43 (SEE N9
Mathematics
Atmospheric Chemistry, Flow Stability, Ozone, Photochemical Reactions, Planetary Waves, Radiative Heat Transfer, Stratosphere, Troposphere, Zonal Flow (Meteorology), Advection, Atmospheric Models, Barotropism, Climate, Free Atmosphere, Mathematical Models, Time Dependence, Uniform Flow, Variability
Scientific paper
Over the past forty years, numerous linear stability studies have been performed in order to explain the origin and structure of observed waves in the atmosphere. Of these studies, only a small fraction have considered the stability of time-dependent, zonally varying flow or the influence of radiative-photochemical feedbacks on the stability of zonally uniform flow. The stability of such flows is described, and these flows may yield important information concerning the origin, structure, and transient time scales of free waves in the atmosphere. During the period 1990 to 1991, a beta-plane model that couples radiative transfer, ozone advection, and ozone photochemistry with the quasigeostrophic dynamical circulation was developed in order to study the diabatic effects of Newtonian cooling and ozone-dynamics interaction on the linear stability of free planetary waves in the atmosphere. The stability of a basic state consisting of a westward-moving wave and a zonal mean jet was examined using a linearized, nondivergent barotropic model on sphere. The sensitivity of the stability of the flow to the strength and structure of the zonal jet was emphasized. The current research is focused on the following problems: (1) examination of the finite amplitude interactions among radiation, ozone, and dynamics; and (2) examination of the role of seasonal forcing in short-term climate variability. The plans for next year are presented.
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