File:Air-sea enthalpy and momentum exchange at major hurricane wind speeds (IA airseenthalpyndm1094510514).pdf
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Summary[edit]
Air-sea enthalpy and momentum exchange at major hurricane wind speeds ( ) | |
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Author |
Bell, Michael M. |
Title |
Air-sea enthalpy and momentum exchange at major hurricane wind speeds |
Publisher |
Monterey, California. Naval Postgraduate School |
Description |
Air--sea exchanges of heat and momentum are important elements in understanding and skillfully predicting tropical cyclone intensity, but the magnitude of the corresponding wind-speed dependent bulk exchange coefficients is largely unknown at major hurricane wind speeds greater than 50 m s-1. Since direct turbulent flux measurements in these conditions are extremely difficult, the momentum and enthalpy fluxes were alternatively deduced via axisymmetric angular momentum and total energy budgets. A comprehensive error analysis was performed using both idealized numerical simulations to quantify and mitigate potentially significant uncertainties resulting from unresolved budget terms and observational errors. An analysis of six missions from the 2003 CBLAST field program in major hurricanes Fabian and Isabel was conducted using a new variational technique. This analysis indicates a near-surface mean drag coefficient (CD) of 2.4x10-3 with a 46% standard deviation and a mean enthalpy coefficient (CK) of 1.0x10-3 with a 40% standard deviation for wind speeds between 52 and 72 m s-1. These are the first known estimates of CK and the ratio of enthalpy to drag coefficient (CK/CD) in major hurricanes. The results suggest that there is no significant change in the magnitude of the bulk exchange coefficients estimated at minimal hurricane wind speeds, and the ratio CK/CD is likely less than 0.75 for wind speeds greater than 50 m s-1. Subjects: Meteorology.; Air-sea interaction; tropical cyclones; surface fluxes; drag coefficient; CBLAST |
Language | English |
Publication date | June 2010 |
Current location |
IA Collections: navalpostgraduateschoollibrary; fedlink |
Accession number |
airseenthalpyndm1094510514 |
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. |
Licensing[edit]
Public domainPublic domainfalsefalse |
This file is a work of a sailor or employee of the U.S. Navy, taken or made as part of that person's official duties. As a work of the U.S. federal government, it is in the public domain in the United States.
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This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. |
https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse
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current | 03:18, 14 July 2020 | 1,275 × 1,650, 156 pages (5.52 MB) | Fæ (talk | contribs) | FEDLINK - United States Federal Collection airseenthalpyndm1094510514 (User talk:Fæ/IA books#Fork8) (batch 1993-2020 #5893) |
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Author | Michael Bell |
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Short title |
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File change date and time | 07:54, 10 June 2010 |
Software used | Microsoft Word: cgpdftops CUPS filter |
Date and time of digitizing | 05:32, 8 June 2010 |
Date metadata was last modified | 07:54, 10 June 2010 |
Conversion program | Acrobat Distiller 8.2.2 (Macintosh) |
Encrypted | no |
Page size | 612 x 792 pts (letter) |
Version of PDF format | 1.4 |