Publication:
Sensitivity of tropical cyclone intensification to perturbations in the surface drag coefficient

Loading...
Thumbnail Image
Authors
Thomsen, Gerald
Montgomery, Michael
Smith, Roger
Subjects
hurricanes
typhoons
wind–wave coupling
Advisors
Date of Issue
2014-01
Date
Publisher
Language
Abstract
The recent studies of the sensitivity of tropical-cyclone intensification to the surface drag coefficient in a three-dimensional model by Montgomery et al. and Smith et al. are extended to include perturbations of the surface drag coefficient in one of four boundary-layer parametrization schemes: the bulk scheme, the Blackadar scheme, the MRF scheme, and the Gayno–Seaman scheme. The schemes are slightly modified to have the same drag coefficient formulation and the same constant exchange coefficients for sensible heat and moisture.We find that the intensification rate and mature intensity are essentially unaltered when the drag coefficient is perturbed randomly by variations of up to 60%. The results, in conjunction with an analysis of coherent drag coefficient variations for a moving vortex, question the notion that coupled wind–wave models are necessary to accurately forecast tropical-cyclone intensification and mature intensity.
Type
Description
The article of record as published may be located at http://dx.doi.org/10.1002/qj.2048
Series/Report No
Department
Meteorology
Other Units
Identifiers
NPS Report Number
Sponsors
Funder
MTM acknowledges the support of grant no. N00014-03- 1-0185 from the US Office of Naval Research, and the US National Science Foundation grant ATM-0715426.
Format
Citation
Sensitivity of tropical cyclone intensification to perturbations in the surface drag coefficient, Q. J. R. Meteorol. Soc., in press: 2013, Gerald Thomsen, Michael Montgomery and Roger Smith
Quarterly Journal of the Royal Meteorological Society, 140: 407–415, January 2014 B
Distribution Statement
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
Collections