Open AccessStructure of a cyclonic disturbance over the south China Sea and the Malaysian region during the winter monsoon
Author(s) -
Boon Khean Cheang
Publication year - 1978
Publication title -
mausam
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.243
H-Index - 12
ISSN - 0252-9416
DOI - 10.54302/mausam.v29i1.2803
Subject(s) - baroclinity , climatology , disturbance (geology) , extratropical cyclone , barotropic fluid , potential vorticity , monsoon , zonal and meridional , troposphere , geology , environmental science , atmospheric sciences , vorticity , meteorology , geography , vortex , paleontology
In this paper, the results of a synoptic compositing technique to determine the structure of a cyclonic disturbance over the South China Sea during the winter monsoon are presented. The disturbance was confined to the lower troposphere. It intensified in the presence of cold surge. This indicates a strong lateral interaction between the extratropical westerly circulation and the equatorial disturbance. A calculation of meridional gradient of potential vorticity was carried out in the region of the disturbance, to test the existence of combined barotropic-baroclinic instability.