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contributor authorChow, K. C.
contributor authorChan, Kwing L.
contributor authorLau, Alexis K. H.
date accessioned2017-06-09T14:37:55Z
date available2017-06-09T14:37:55Z
date copyright2002/10/01
date issued2002
identifier issn0022-4928
identifier otherams-23196.pdf
identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4159730
description abstractA theory based on the shallow water equation is developed to explain the generation of moving spiral-banded structures in tropical cyclones. The theory proposes that fluctuation of the vorticity distribution in the compact core region can act as a source, generating gravity waves that produce the banded structures. This mechanism is usually called the Lighthill radiation mechanism. A numerical experiment using the Fifth Pennsylvania State University?National Center for Atmospheric Research Mesoscale Model (MM5) code is used to test this theory. The moving bands in the simulated tropical cyclone show good agreement with the theoretically calculated gravity waves that emerge from a core region with an elliptical distribution of vorticity. Results of the simulated cyclone also illustrate that spiral cloud bands are triggered by the propagating gravity waves.
publisherAmerican Meteorological Society
titleGeneration of Moving Spiral Bands in Tropical Cyclones
typeJournal Paper
journal volume59
journal issue20
journal titleJournal of the Atmospheric Sciences
identifier doi10.1175/1520-0469(2002)059<2930:GOMSBI>2.0.CO;2
journal fristpage2930
journal lastpage2950
treeJournal of the Atmospheric Sciences:;2002:;Volume( 059 ):;issue: 020
contenttypeFulltext


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