Identification

Title

Supergradient winds in simulated tropical cyclones

Abstract

In a previous paper a formula was derived for the maximum potential intensity of the tangential wind in a tropical cyclone called PI+. The formula, PI+2 = EPI2 + alpha r(m)w(m)eta(m), where EPI is the maximum potential intensity of the gradient wind and alpha r(m)w(m)eta(m) represents the supergradient winds. The latter term is the product of the radius r(m), the vertical velocity w(m), the azimuthal vorticity eta(m) at the radius and height of the maximum tangential wind (r(m), z(m)), and the (nearly constant) alpha. Examination of a series of simulations of idealized tropical cyclones indicate an increasing contribution from the supergradient-wind term to PI+ as the radius of maximum wind increases. In the present paper, the physical content of the supergradient-wind term is developed showing how it is directly related to tropical cyclone boundary layer dynamics. It is found that rmwm eta m PROP;umin2zm(rm)/l upsilon(zm) PROP;rm, where -u(min) is the maximum boundary layer radial inflow velocity and l(upsilon)(z) is the vertical mixing length.

Resource type

document

Resource locator

Unique resource identifier

code

http://n2t.net/ark:/85065/d7wq07jh

codeSpace

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

geoscientificInformation

Keywords

Keyword set

keyword value

Text

originating controlled vocabulary

title

Resource Type

reference date

date type

publication

effective date

2016-01-01T00:00:00Z

Geographic location

West bounding longitude

East bounding longitude

North bounding latitude

South bounding latitude

Temporal reference

Temporal extent

Begin position

End position

Dataset reference date

date type

publication

effective date

2022-08-01T00:00:00Z

Frequency of update

Quality and validity

Lineage

Conformity

Data format

name of format

version of format

Constraints related to access and use

Constraint set

Use constraints

Limitations on public access

None

Responsible organisations

Responsible party

contact position

OpenSky Support

organisation name

UCAR/NCAR - Library

full postal address

PO Box 3000

Boulder

80307-3000

email address

opensky@ucar.edu

web address

http://opensky.ucar.edu/

name: homepage

responsible party role

pointOfContact

Metadata on metadata

Metadata point of contact