Identification

Title

Quasi‐periodic intensification of convective asymmetries in the outer eyewall of Typhoon Lekima (2019)

Abstract

Typhoon Lekima (2019) possessed a double-eyewall structure before making landfall in eastern China, with its outer eyewall showing quasi-periodic convective intensification. Several physical mechanisms that may cause eyewall convection asymmetries were examined. The upshear occurrence of the strongest convection could not be explained by either the typhoon's motion or the effect of descending inflow from outer rainbands. Radar reflectivity analysis showed that phase locking occurred between the wavenumber-2 vortex Rossby waves (VRWs) propagating radially outward from the inner eyewall and the azimuthally propagating wavenumber-1 VRWs on the inner edge of the outer eyewall. Additional phase locking further arose between the aforementioned wavenumber-1 VRWs and the azimuthally propagating wavenumber-2 VRWs on the outer edge of the outer eyewall. These two phase-locking processes led to the pronounced quasi-periodic intensification of the convective asymmetry in the western semicircle of Lekima's outer eyewall.

Resource type

document

Resource locator

Unique resource identifier

code

http://n2t.net/ark:/85065/d76976zs

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

2021-03-16T00:00:00Z

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