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Chemical characteristics of Central Indian Basin waters during the southern summer

DRS at CSIR-National Institute of Oceanography

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Title Chemical characteristics of Central Indian Basin waters during the southern summer
 
Creator DeSousa, S.N.
Sardessai, S.
RameshBabu, V.
Murty, V.S.N.
Gupta, G.V.M.
 
Subject water column
chemical properties
baseline studies
water masses
water properties
summer
 
Description Chemical properties of the water column were examined at the Indian Deep-sea Environment Experiment (INDEX) site in the Central Indian Basin (CIB), as a part of baseline studies prior to the benthic disturbance experiment for the environmental impact assessment of mining of polymetallic nodules. The study shows three equatorward moving water masses. (1) The Subsurface Salinity Maximum in the depth range 125-200 m, characterized by high salinity (34.74-34-77 psu) and oxygen minimum associated with weak maxima in nutrients. (2) The Deep Oxygen Maximum (234-245 mu M) in the depth range 250-750 m, associated with minima in nutrients and relatively high pH. 93) The Salinity Minimum Water (34.714-34.718 psu) corresponding to the Antarctic Intermediate Water (AAIW) at depths 800-1200 m in the density (sigma-theta) range 27.2-27.5. Progressive changes in these characteristics are attributed to mixing with waters above and below, and to oxidation of organic detritus en routs. Among the three water masses, the oxygen maximum water shows the lowest changes in its properties, which may suggest that this water mass is moving the fastest
 
Date 2009-01-07T10:21:24Z
2009-01-07T10:21:24Z
2001
 
Type Journal Article
 
Identifier Deep-Sea Research (II: Topical Studies in Oceanography), Vol.48; 3343-3352p.
http://drs.nio.org/drs/handle/2264/1535
 
Language en
 
Rights Copyright [2001]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
 
Publisher Pergamon