Accession Number : AD0782662

Title :   The Non-Linear Growth of Hurricanes through CISK,

Corporate Author : NAVAL ACADEMY ANNAPOLIS MD DEPT OF ENVIRONMENTAL SCIENCES

Personal Author(s) : Willoughby,H. E.

Report Date : 10 APR 1974

Pagination or Media Count : 26

Abstract : A simple, analytic model of the non-linear intensification of hurricanes through Conditional Instability of the Second Kind (CISK) is presented. The model predicts that the time required for a tropical cyclone to reach a specified fraction of its ultimate intensity will be inversely proportional to the ultimate wind speed if the conditions in the sea and atmosphere surrounding the storm remain constant in time. Within the framework of the model, a characteristic time required for a tropical cyclone to transform itself from a weak tropical depression into a hurricane is 35 hours. Although this time is shorter than that obtained in most earlier studies, it agrees with the observed average behavior of seventeen storms from the 1969, 1970, and 1971 Atlantic hurricane seasons. (Author)

Descriptors :   *Hurricanes, *Air water interactions, Mathematical models, Wind velocity, Intensity, Heat transfer, Boundary layer, Equations of motion, Atlantic Ocean

Subject Categories : Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE