Open AccessEvolution of two troughs in the tropical Indian Ocean and their characteristic features
Author(s) -
Martin S. Singh,
B. Lakshmanaswamy
Publication year - 1992
Publication title -
mausam
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.243
H-Index - 12
ISSN - 0252-9416
DOI - 10.54302/mausam.v43i4.3507
Subject(s) - trough (economics) , southern hemisphere , climatology , indian ocean , northern hemisphere , geology , south asia , oceanography , tropics , geography , ancient history , history , fishery , biology , economics , macroeconomics
Evolution and characteristic features of double trough systems in the tropical Indian Ocean have been studied with the help of Climatological Atlas (Part I andIl) ~f the Tropical Indian Oc.ean (Hastenrath and Lamb 1979). It is confirmed that there are two troughs (Northern Hemisphere EquatorIal Trough and Southern Hemisphere Equatorial Trough) in this region (including south Asian landmass) all the year round, one in northern hemisphere and the other in southern. Both are migratory in nature and, perhaps, thermal in origin. In the convergent zones of the two troughs, there is extensive cloudiness. The migration of these trough systems during their respective summer seasons appear to be related to the extensive heating of the south Asian/ African land masses surrounding the Indian Ocean in north and west.