Record Details

Spatio-temporal distributions of delta<sup>18</sup>O, delta D and salinity in the Arabian Sea: Identifying processes and controls

DRS at CSIR-National Institute of Oceanography

View Archive Info
 
 
Field Value
 
Title Spatio-temporal distributions of delta18O, delta D and salinity in the Arabian Sea: Identifying processes and controls
 
Creator Deshpande, R.D.
Muraleedharan, P.M.
Singh, R.L.
Kumar, B.
Rao, M.S.
Dave, M.
Sivakumar, K.U.
Gupta, S.K.
 
Subject geographical distribution
temporal distribution
salinity
oxygen isotopes
 
Description Isotopic compositions ( delta18O and deltaD) and salinity (S) of 683 surface water samples from the Arabian Sea (AS) collected during 2008–2010, were measured to understand the factors controlling the spatio-temporal distribution of these parameters. From the distributions of delta18O and salinity (S), and the relationships between delta18O– deltaD and delta18O–S, the following inferences have been drawn: (1) there is a broad correspondence between the geographic distributions of the delta18O and S; (2) in spite of a large scatter, a statistically significant delta18O–S relationship can be identified in much of the investigated part of the AS; (3) the delta18O– deltaD regression line for all samples clumped together has a slope of 3.2 (± 0.16), much lower than that (7.37) for the global ocean surface water line (GOSWL), which in the case of the AS is seen only for samples with salinity < 34; (4) the linear relationship between delta18O and deltaD breaks down completely in the months of March–May; (5) contrary to the adjoining Bay of Bengal (BOB), both delta18O and S progressively increase from the equator northwards; (6) the delta18O– deltaD and the delta18O–d-excess relationships indicate strong kinetic fractionation due to evaporation from surface waters of the AS throughout the year, with enhancement during summer months.
 
Date 2013-12-10T05:55:49Z
2013-12-10T05:55:49Z
2013
 
Type Journal Article
 
Identifier Marine Chemistry, vol.157; 2013; 144-161
http://drs.nio.org/drs/handle/2264/4403
 
Language en
 
Rights An edited version of this paper was published by Elsevier. Copyright [2013] Elsevier
 
Publisher Elsevier