Changes in surface productivity and subsurface denitrification during the Holocene: a multiproxy study from the eastern Arabian Sea-Reference-Cited by-同舟云学术

Changes in surface productivity and subsurface denitrification during the Holocene: a multiproxy study from the eastern Arabian Sea

Published:2003-07 Issue:5 Volume:13 Page:701-713
ISSN:0959-6836
Container-title:The Holocene
language:en
Short-container-title:The Holocene

Author:

Agnihotri Rajesh¹,Bhattacharya S. K.,Sarin M. M.,Somayajulu B. L.K.²

Affiliation:

1. Physical Research Laboratory, Navrangapura, Ahmedabad 380 009, Gujarat, India; Biogeochemistry Department, Max Planck Institute for Chemistry, PO Box 3060, 55020 Mainz, Germany

2. Physical Research Laboratory, Navrangapura, Ahmedabad 380 009, Gujarat, India

Abstract

Spatial and temporal variations in the intensity of subsurface denitrification in the water-column of the eastem Arabian Sea have been investigated using chemical and isotopic proxies. The data show a steady increase in the denitrification intensity from ∼10 ka to ∼2 ka BP, probably caused by changes in surface productivity fuelled by strengthening of upwelling (monsoonal intensity). In addition, changes in redox conditions and detrital material input are assessed using abundances of a suite of major and trace elements. The temporal variations in some of the monsoonal proxies are characterized by periodicities of ∼1400 and ∼700 years, similar to those reported in the South Asian (Chinese) monsoon and high-latitude climate (north Atlantic region).

Publisher

SAGE Publications

Subject

Paleontology,Earth-Surface Processes,Ecology,Archaeology,Global and Planetary Change

Link

http://journals.sagepub.com/doi/pdf/10.1191/0959683603hl656rp

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