TY - JOUR
T1 - Late-Quaternary biogenic productivity and organic carbon deposition in the eastern Arabian Sea
AU - Agnihotri, Rajesh
AU - Sarin, M. M.
AU - Somayajulu, B. L.K.
AU - Jull, A. J.T.
AU - Burr, G. S.
N1 - Funding Information:
This work was partly supported by JGOFS/DOD (Indian program of Department of Ocean Development) and ISRO/GBP of the Department of Space. We thank Mr. V. Ravindranathan, Director CMLRE, Captain and Crew of FORV Sagar Sampada (DOD) for their help. We also thank Prof. S. Krishnaswami for fruitful discussions during the course of the study. B.L.K.S. was a CSIR Emeritus Scientist during this period. We thank Dr. A. Sarkar for his analytical help with hand-picked planktonic foraminifera species. The critical comments provided by anonymous reviewers were of immense help in improving the manuscript.
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2003/8/15
Y1 - 2003/8/15
N2 - Paleoproductivity variations in the eastern Arabian Sea, during the late Quaternary period (∼42 ka BP to present), have been studied using accumulation rates of sedimentary biogenic components: organic carbon (Corg), nitrogen (N), CaCO3, Sr and Ba. Such a multi-proxy approach reveals decreased surface productivity during the last glacial-interglacial transition. The observed change of surface water productivity during the last glacial-interglacial period is in antiphase to those observed in other low- and mid-latitude upwelling areas, however, consistent with some of the upwelling regions like NW Africa and NW Mexico. Sedimentary Corg and N are found to be decoupled from surface productivity trend, with significant enrichments in Corg and N during the Last Glacial Maximum (LGM). This is interpreted in terms of increase in sedimentation rates (by a factor of 3-4) resulting in the better preservation of Corg during the LGM.
AB - Paleoproductivity variations in the eastern Arabian Sea, during the late Quaternary period (∼42 ka BP to present), have been studied using accumulation rates of sedimentary biogenic components: organic carbon (Corg), nitrogen (N), CaCO3, Sr and Ba. Such a multi-proxy approach reveals decreased surface productivity during the last glacial-interglacial transition. The observed change of surface water productivity during the last glacial-interglacial period is in antiphase to those observed in other low- and mid-latitude upwelling areas, however, consistent with some of the upwelling regions like NW Africa and NW Mexico. Sedimentary Corg and N are found to be decoupled from surface productivity trend, with significant enrichments in Corg and N during the Last Glacial Maximum (LGM). This is interpreted in terms of increase in sedimentation rates (by a factor of 3-4) resulting in the better preservation of Corg during the LGM.
KW - Arabian Sea
KW - Last Glacial Maximum (LGM)
KW - Organic carbon
KW - Sedimentation rate
KW - Southwest monsoon
KW - Surface productivity
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U2 - 10.1016/S0031-0182(03)00385-7
DO - 10.1016/S0031-0182(03)00385-7
M3 - Article
AN - SCOPUS:0042705050
VL - 197
SP - 43
EP - 60
JO - Palaeogeography, Palaeoclimatology, Palaeoecology
JF - Palaeogeography, Palaeoclimatology, Palaeoecology
SN - 0031-0182
IS - 1-2
ER -