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contributor authorRitchie, Elizabeth A.
contributor authorHolland, Greg J.
date accessioned2017-06-09T16:11:22Z
date available2017-06-09T16:11:22Z
date copyright1997/07/01
date issued1997
identifier issn0027-0644
identifier otherams-62915.pdf
identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4203860
description abstractThe development of Typhoon Irving is investigated using a variety of data, including special research aircraft data from the Tropical Cyclone Motion (TCM-92) experiment, objective analyses, satellite data, and traditional surface and sounding data. The development process is treated as a dry-adiabatic vortex dynamics problem, and it is found that environmental and mesoscale dynamics mutually enhance each other in a cooperative interaction during cyclone formation. Synoptic-scale interactions result in the evolution of the hostile environment toward more favorable conditions for storm development. Mesoscale interactions with the low-level, large-scale circulations and with other midlevel, mesoscale features result in development of vorticity in the midlevels and enhancement of the low-level vorticity associated with the developing surface cyclone. Multiple developments of mesoscale convective systems after the storm reaches tropical depression strength suggests both an increase in low-level confluence and a tendency toward recurrent development of associated mesoscale convective vortices. This is observed in both aircraft data and satellite imagery where subsequent interactions, including mergers with the low-level, tropical depression vortex, are observed. A contour dynamics experiment suggests that the movement of mesoscale convective systems in satellite imagery corresponds well to the movement of their associated midlevel vortices. Results from a simple baroclinic experiment show that the midlevel vortices affect the large-scale, low-level circulation in two ways: 1) initially, interactions between midlevel vortices produce a combined vortex of greater depth; 2) interaction between midlevel vortices and the low-level circulation produces a development downward of the midlevel vorticity. This strengthens the surface vortex and develops a more cohesive vortex that extends from the surface through the midtroposphere.
publisherAmerican Meteorological Society
titleScale Interactions during the Formation of Typhoon Irving
typeJournal Paper
journal volume125
journal issue7
journal titleMonthly Weather Review
identifier doi10.1175/1520-0493(1997)125<1377:SIDTFO>2.0.CO;2
journal fristpage1377
journal lastpage1396
treeMonthly Weather Review:;1997:;volume( 125 ):;issue: 007
contenttypeFulltext


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