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contributor authorChan, Johnny C. L.
contributor authorWilliams, R. T.
date accessioned2017-06-09T14:27:16Z
date available2017-06-09T14:27:16Z
date copyright1987/05/01
date issued1987
identifier issn0022-4928
identifier otherams-19530.pdf
identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4155657
description abstractThe ?-effect on tropical cyclone motion is studied using an analytical as well as a numerical model in a nondivergent barotropic framework. The analytical model and the linear version of the numerical model give essentially the same result: the linear ?-effect causes a westward stretching of the model vortex but no significant movement of the vortex center. An east-west asymmetry in the meridional wind field is also created. It is the inclusion of the nonlinear term that produces the northwestward movement of the vortex previously found by other investigators (e.g., Kitade, 1981). This northwestward movement increases with both the maximum wind speed and the radius of maximum wind in a constant-shape vortex. A wind maximum is also found to the northeast of the vortex, which appears to be consistent with the observational findings of Shea and Gray. This asymmetry plays an important role in the vortex motion.
publisherAmerican Meteorological Society
titleAnalytical and Numerical Studies of the Beta-Effect in Tropical Cyclone Motion. Part I: Zero Mean Flow
typeJournal Paper
journal volume44
journal issue9
journal titleJournal of the Atmospheric Sciences
identifier doi10.1175/1520-0469(1987)044<1257:AANSOT>2.0.CO;2
journal fristpage1257
journal lastpage1265
treeJournal of the Atmospheric Sciences:;1987:;Volume( 044 ):;issue: 009
contenttypeFulltext


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