File:An observational study of tropical cyclone spin-up in Supertyphoon Jangmi and Hurricane Georges (IA anobservationals1094510686).pdf
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Summary[edit]
An observational study of tropical cyclone spin-up in Supertyphoon Jangmi and Hurricane Georges
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| Author |
Sanger, Neil T. |
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| Title |
An observational study of tropical cyclone spin-up in Supertyphoon Jangmi and Hurricane Georges |
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| Publisher |
Monterey, California. Naval Postgraduate School |
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| Description |
An observational study of tropical cyclone spin-up is performed using dropsondes and satellite imagery from Supertyphoon Jangmi and Hurricane Georges. Additionally, ELDORA data are analyzed in Tropical Storm Jangmi. The dropsonde analysis shows that the peak tangential wind occurs persistently within the boundary layer and suggests that significant supergradient winds are present there. However, as a result of data limitations arising from asymmetries and irregular placement of dropsondes in both time and space, a strongly conclusive statement about the presence of supergradient winds in Tropical Storm Jangmi is not possible. A dense deployment of dropsondes across the RMW is recommended to resolve the pressure gradient with sufficient accuracy to validate that supergradient winds exist at the tropical storm stage. An examination of ELDORA data in Tropical Storm Jangmi indicates that multiple rotating updrafts are present near the eye underneath cold cloud tops of -65C. Analysis of the infrared satellite imagery from both storms suggests that rotating updrafts are omnipresent before and during rapid intensification. The findings of this study support a new theoretical model positing that spin-up of the maximum winds occurs within the boundary layer and rotating deep convective cells are predominant during tropical cyclone intensification. Subjects: Hurricane Georges, 1998.; Tropical cyclone spin-up; vortical hot towers; Supertyphoon Jangmi; Hurricane Georges; tropical cyclone intensification; rapid intensification; rotating deep convection; tropical cyclone boundary layer |
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| Language | English | |
| Publication date | December 2011 | |
| Current location |
IA Collections: navalpostgraduateschoollibrary; fedlink |
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| Accession number |
anobservationals1094510686 |
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| Source | ||
| Permission (Reusing this file) |
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. As such, it is in the public domain, and under the provisions of Title 17, United States Code, Section 105, may not be copyrighted. | |
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This image or file is a work of a U.S. Air Force Airman or employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image or file is in the public domain in the United States.
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| current | 15:09, 14 July 2020 |  | 1,275 × 1,650, 188 pages (5.65 MB) | Fæ (talk | contribs) | FEDLINK - United States Federal Collection anobservationals1094510686 (User talk:Fæ/IA books#Fork8) (batch 1993-2020 #7686) |
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