Evolution of two troughs in the tropical Indian Ocean and their characteristic features

Authors

  • M.S. SINGH
  • B. Lakshmanaswamy

DOI:

https://doi.org/10.54302/mausam.v43i4.3507

Keywords:

Thermal trough, International Indian Ocean Expedition (IIOE), NHET, SHET

Abstract

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.

 

Downloads

Published

01-10-1992

How to Cite

[1]
M. . SINGH and B. Lakshmanaswamy, “Evolution of two troughs in the tropical Indian Ocean and their characteristic features”, MAUSAM, vol. 43, no. 4, pp. 395–398, Oct. 1992.

Issue

Vol. 43 No. 4 (1992): Mausam

Section

Shorter Contribution

License

Copyright (c) 2021 MAUSAM

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

All articles published by MAUSAM are licensed under the Creative Commons Attribution 4.0 International License. This permits anyone.

Anyone is free:

  • To Share - to copy, distribute and transmit the work
  • To Remix - to adapt the work.

Under the following conditions:

  • Share - copy and redistribute the material in any medium or format
  • Adapt - remix, transform, and build upon the material for any purpose, even
    commercially.