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contributor authorEgger, J.
date accessioned2017-06-09T14:22:41Z
date available2017-06-09T14:22:41Z
date copyright1981/12/01
date issued1981
identifier issn0022-4928
identifier otherams-18249.pdf
identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4154233
description abstractThe dynamic climatology of a simple model of barotropic stochastically forced ?-plane flow over topography is studied. Except for the forcing, the model is similar to the three-component systems studied by Charney and DeVore (1979) and Hart (1979). In certain regions of parameter space there are two stable equilibria, a high-index flow with strong zonal winds and a low-index flow with a pronounced wave component. A random forcing is added in order to incorporate crudely the impact of the truncated flow modes on those retained in the model. The Fokker-Planck equation for this system is solved numerically and the steady-state probability distribution of the system is evaluated. It is found that the probability density distribution has maxima at the equilibria but that there also is a finite probability for intermediate states. This situation corresponds to that in the atmosphere where certain types of circulation like a high-index flow are met more frequently than others. It is also found that the predictability of the flow system studied depends strongly on the location of the initial state in phase space.
publisherAmerican Meteorological Society
titleStochastically Driven Large-scale Circulations with Multiple Equilibria
typeJournal Paper
journal volume38
journal issue12
journal titleJournal of the Atmospheric Sciences
identifier doi10.1175/1520-0469(1981)038<2606:SDLSCW>2.0.CO;2
journal fristpage2606
journal lastpage2618
treeJournal of the Atmospheric Sciences:;1981:;Volume( 038 ):;issue: 012
contenttypeFulltext


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