Spatio-temporal distributions of delta<sup>18</sup>O, delta D and salinity in the Arabian Sea: Identifying processes and controls
IR@NIO: CSIR-National Institute Of Oceanography, Goa
View Archive Info| Field | Value | |
| Creator |
Deshpande, R.D.
Muraleedharan, P.M. Singh, R.L. Kumar, B. Rao, M.S. Dave, M. Sivakumar, K.U. Gupta, S.K. |
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| Date |
2013-12-10T05:55:49Z
2013-12-10T05:55:49Z 2013 |
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| Identifier |
Marine Chemistry, vol.157; 2013; 144-161
http://drs.nio.org/drs/handle/2264/4403 |
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| Description |
Isotopic compositions ( delta<sup>18O</sup> 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 delta<sup>18O</sup> and salinity (S), and the relationships between delta<sup>18O</sup>– deltaD and delta<sup>18O</sup>–S, the following inferences have been drawn: (1) there is a broad correspondence between the geographic distributions of the delta<sup>18O</sup> and S; (2) in spite of a large scatter, a statistically significant delta<sup>18O</sup>–S relationship can be identified in much of the investigated part of the AS; (3) the delta<sup>18O</sup>– 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 delta<sup>18O</sup> and deltaD breaks down completely in the months of March–May; (5) contrary to the adjoining Bay of Bengal (BOB), both delta<sup>18O</sup> and S progressively increase from the equator northwards; (6) the delta<sup>18O</sup>– deltaD and the delta<sup>18O</sup>–d-excess relationships indicate strong kinetic fractionation due to evaporation from surface waters of the AS throughout the year, with enhancement during summer months.
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| Language |
en
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| Publisher |
Elsevier
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| Rights |
An edited version of this paper was published by Elsevier. Copyright [2013] Elsevier
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| Subject |
geographical distribution
temporal distribution salinity oxygen isotopes |
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| Title |
Spatio-temporal distributions of delta<sup>18</sup>O, delta D and salinity in the Arabian Sea: Identifying processes and controls
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| Type |
Journal Article
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