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European Geosciences Union, Biogeosciences Discussions, 8(12), p. 6003-6035

DOI: 10.5194/bgd-12-6003-2015

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Inter-decadal changes in the intensity of the Oxygen Minimum Zone off Concepción, Chile (~ 36° S) over the last century

Journal article published in 2015 by B. S. Srain, S. P. Pantoja, Julio S. Sepúlveda, C. B. L. Lange ORCID, P. M. Muñoz, Roger Everett S. Summons, J. M. McKay, M. Salamanca
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

We reconstructed oxygenation changes in the Oxygen Minimum Zone of the upwelling ecosystem off Concepción (36° S), Chile, using inorganic and organic proxies in a sediment core covering the last ca. 110 years of sedimentation in this area. Authigenic enrichments of Mo, U and Cd were observed between ca. 1935–1971 CE indicating a prolonged period of more reduced conditions in bottom waters and surface sediments. Significant positive correlations ( p