Role of marine biology in glacial-interglacial CO cycles

Kohfeld, K.E., Le Quéré, C., Harrison, S.P. and Anderson, R.F. (2005) Role of marine biology in glacial-interglacial CO cycles. Science, 308 (5718). pp. 74-78. ISSN 0036-8075

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Abstract

It has been hypothesized that changes in the marine biological pump caused a major portion of the glacial reduction of atmospheric carbon dioxide by 80 to 100 parts per million through increased iron fertilization of marine plankton, increased ocean nutrient content or utilization, or shifts in dominant plankton types. We analyze sedimentary records of marine productivity at the peak and the middle of the last glacial cycle and show that neither changes in nutrient utilization in the Southern Ocean nor shifts in plankton dominance explain the CO drawdown. Iron fertilization and associated mechanisms can be responsible for no more than half the observed drawdown.

Item Type: Article
Faculty \ School: Faculty of Science > Tyndall Centre for Climatic Change
University of East Anglia > Faculty of Science > Research Centres > Tyndall Centre for Climate Change Research
University of East Anglia > Faculty of Science > Research Groups > Marine and Atmospheric Sciences
Faculty of Arts and Humanities > School of History
Faculty of Medicine and Health Sciences > Norwich Medical School
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Depositing User: Pure Connector
Date Deposited: 03 Feb 2014 11:26
Last Modified: 29 Aug 2018 10:31
URI: https://ueaeprints.uea.ac.uk/id/eprint/47468
DOI: 10.1126/science.1105375

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