NISCAIR Online Periodicals Repository

NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR)  >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Geo-Marine Sciences (IJMS) >
IJMS Vol.39 [2010] >
IJMS Vol.39(3) [September 2010] >


Title: Seasonal cycle of physical forcing and biological response in the Bay of Bengal
Authors: Kumar, S Prasanna
Nuncio, M
Narvekar, Jayu
Ramaiah, N
Sardesai, S
Gauns, M
Fernandes, V
Keywords: Stratification
Advection
Wind-mixing
Mixed layer depth
Cold-core eddy
Chlorophyll
Primary productivity
Nutrients
Issue Date: Sep-2010
Publisher: NISCAIR-CSIR, India
Abstract: Seasonal cycle of the physical processes and the biological response in the Bay of Bengal were studied using co-located physical, chemical and biological data collected along the central and the western Bay covering four seasons from 2001 to 2006. The spring intermonsoon was characterized by warm surface waters with high salinity and less stable water column compared to summer and fall intermonsoon. During summer, freshening due to precipitation and river discharge strongly stratified the upper water column, especially in the north. Continued freshening and presence of low salinity waters during fall intermonsoon sustained the stratification. Presence of cold core eddies controlled the nutrient flux to the upper layers. During winter, the net heat loss from the sea surface led to the surface cooling with coldest sea surface temperature. Comparatively stronger winds were able to initiate wind-mixing as the water column stability was the least during this period. Less stable water column also supported an efficient nutrient supply by cold core eddies. It resulted in the highest mean column integrated chlorophyll as well as primary productivity. Perennially low surface chlorophyll in the Bay of Bengal was largely controlled by the physical processes such as stratification and reduced wind-mixing. The moderate column integrated chlorophyll biomass as well as primary productivity throughout the year was regulated by the presence of mesoscale eddies.
Page(s): 388-405
CC License:  CC Attribution-Noncommercial-No Derivative Works 2.5 India
ISSN: 0975-1033 (Online); 0379-5136 (Print)
Source:IJMS Vol.39(3) [September 2010]

Files in This Item:

File Description SizeFormat
IJMS 39(3) 388-405.pdf1.48 MBAdobe PDFView/Open
 Current Page Visits: 665 
Recommend this item

 

National Knowledge Resources Consortium |  NISCAIR Website |  Contact us |  Feedback

Disclaimer: NISCAIR assumes no responsibility for the statements and opinions advanced by contributors. The editorial staff in its work of examining papers received for publication is helped, in an honorary capacity, by many distinguished engineers and scientists.

CC License Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India

Copyright © 2012 The Council of Scientific and Industrial Research, New Delhi. All rights reserved.

Powered by DSpace Copyright © 2002-2007 MIT and Hewlett-Packard | Compliant to OAI-PMH V 2.0

Home Page Total Visits: 509802 since 06-Feb-2009  Last updated on 11-Apr-2014Webmaster: nopr@niscair.res.in