Record Details

Oscillating environmental responses of the eastern Arabian Sea

DRS at CSIR-National Institute of Oceanography

View Archive Info
 
 
Field Value
 
Title Oscillating environmental responses of the eastern Arabian Sea
 
Creator Gerson, V.J.
Madhu, N.V.
Jyothibabu, R.
Balachandran, K.K.
Nair, M.
Revichandran, C.
 
Subject coastal upwelling
phytoplankton
biological production
environmental effects
 
Description Characteristics of two distinct physical processes, the coastal upwelling and convective overturning, which enhance phytoplankton productivity in the west coast of India, are discussed in this study. Systematic in-situ data collected during the two contrasting monsoon (summer and winter) periods were utilized for the study. During summer monsoon, the colder (27°C), less oxygenated (2 mu M) waters were evidenced in the upper layers of the southwest coast of India, along with higher level of primary production (surface - 76 mgC m-3d-1 & column -1629 mgC m-2d-1) and chlorophyll a (surface - 1.2 mgm-3 & column -45.7 mgm-2). In contrast, during winter, the upper thermohaline layer of the northeastern Arabian Sea exhibited colder sea surface temperature (SST, 25-26°C), and deeper mixed layer depth (MLD, >70 m). This area was distinguished by less oxygenated (2mu M) and high productive (surface - >10 mgC m-3 d-1 & column - >800 mgC m-2 d-1) waters. I can be stated that the physically forced chemical changes occurred in the upper layers of both southeastern and northeastern Arabian Sea, appeared in an oscillating manner with respect to monsoonal changes, seemed to trigger the enhancement of phytoplankton productivity of the area.
 
Date 2014-03-05T10:50:03Z
2014-03-05T10:50:03Z
2014
 
Type Journal Article
 
Identifier Indian Journal of Geo-Marine Sciences, vol.43(1); 2014; 67-75
http://drs.nio.org/drs/handle/2264/4483
 
Language en
 
Rights © IJMS/NISCAIR 2014. CC Attribution 3.0 License
 
Publisher CSIR-NISCAIR