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Early- to late-Holocene contrast in productivity, OMZ intensity and calcite dissolution in the eastern Arabian Sea

DRS at CSIR-National Institute of Oceanography

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Title Early- to late-Holocene contrast in productivity, OMZ intensity and calcite dissolution in the eastern Arabian Sea
 
Creator Naik, S.S.
Godad, S.P.
Naidu, P.D.
Tiwari, M.
Paropkari, A.L.
 
Subject calcite dissolution
Oxygen Minimum Zone
 
Description The Oxygen Minimum Zone (OMZ) is a potential source of CO2 to the atmosphere, and the extensive OMZ spread to 1.37 × 106 km2 in the Northern Arabian Sea would be an important contributor to the CO2 budget. In this perspective, we report here that the Eastern Arabian Sea experienced coeval increase in productivity and denitrification from ~7 to 0 kyr, which coincides with minimum dissolved oxygen levels in bottom waters. In addition, during the same period, an increased calcium carbonate dissolution occurred as evidenced by low CaCO3 content, decreasing shell weights of planktonic foraminifer species Globigerinoides ruber with well-marked dissolution features on their shells. Therefore, this study has implications on the role of OMZ in governing CaCO3 dissolution and contributing to an increase in atmospheric CO2.
 
Date 2014-06-11T11:25:59Z
2014-06-11T11:25:59Z
2014
 
Type Journal Article
 
Identifier Holocene, vol.24(6); 2014; 749-755.
no
http://drs.nio.org/drs/handle/2264/4542
 
Language en
 
Relation Bioorg_Med_Chem_Lett_24_2863.jpg
 
Rights © The Author(s) 2014. An edited version of this paper was published by SAGE
 
Publisher SAGE Publications