A Technique for Predicting South China Sea Tropical Cyclones.
Abstract
The low-level cyclonic shear zone in the South China Sea is investigated as a possible precursor of tropical storm activity within the South China Sea. For tropical storm genesis in this area, it is shown that the strength of the cyclonic shear zone reaches a critical intensity approximately 24 to 48 hours before cyclogenesis takes place. Also, if the cyclonic shear zone is not present and there is either a large-scale ridge or easterly flow across the South China Sea, then tropical storm genesis does not take place for at least a week. With respect to tropical storms approaching the South China Sea from the Philippine Sea, the presence of a cyclonic shear zone is a good indication that the tropical storm will move into the area. On the other hand, when a large-scale low-level ridge is present over the area, these storm recurve northward and will not enter the South China Sea. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1969
- Accession Number
- AD0780209
Entities
People
- J. D. Jarrell
- L. R. Brody