Open AccessPersistence of the movement of the tropical cyclones depressions In the Bay of Bengal during the premonsoon and post monsoon periods
Author(s) -
S. JAYARAMAN,
T. Srinivasan,
N. C. RAI SIRCAR
Publication year - 1966
Publication title -
mausam
Language(s) - English
Resource type - Journals
ISSN - 0252-9416
DOI - 10.54302/mausam.v17i3.5728
Subject(s) - bengal , bay , monsoon , tropical cyclone , clockwise , climatology , storm , geology , environmental science , oceanography , geography , mathematics , geometry , rotation (mathematics)
An examination of the tracks of cyclonic storms/depressions in the Bay of Bengal during the pre-monsoon and post-monsoon periods (April-May and October-December respectively) for the years 1891 to 1960 was made with reference to the characteristic of their direction of movements. The sea area was divided into 2 ½ degree squares for this study. The cyclonic disturbances in each of the 2 ½ degree were classified into three categories, viz., (1) clockwise curvature, a. (2) anticlockwise curvature, b and (3) persistent type, c. The relative percentage frequencies of the above types a, b and c in each of the 2 ½ degree squares for the months April-May and October-December were found out and isolines of the percentage frequencies at 20 percent intervals were drawn on the diagrams.