Impact Factor:0.0
DOI number:10.1007/s11802-008-0241-8
Journal:Journal of Ocean University of China
Abstract:Ocean surface winds observed by the Quick Scatterometer (QuikSCAT) satellite prior to the geneses of 36 tropical cyclones (TCs) in the South China Sea (SCS) are investigated in this paper. The results show that there are areas with negative mean
horizontal divergence around the TC genesis locations three days prior to TC formation. The divergence term [–(f+ζ)(∂u/∂x+∂v/∂y)]
in the vorticity equation is calculated based upon the QuikSCAT ocean surface wind data. The calculated mean divergence term is
about 10.3 times the mean relative vorticity increase rate around the TC genesis position one day prior to TC genesis, which shows
the important contributions of the divergence term to the vorticity increase prior to TC formation. It is suggested that criteria related with the divergence and divergence term be applied in early detections of tropical cyclogenesis using the QuikSCAT satellite data.
Volume:7
Issue:3
Page Number:241-245
ISSN No.:1672-5182
Translation or Not:no
Date of Publication:2008-08-30