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A 23,000-year record of surface water pH and PCO2 in the western equatorial Pacific Ocean

Palmer, M.R. and Pearson, P.N. (2003) A 23,000-year record of surface water pH and PCO2 in the western equatorial Pacific Ocean Science, 300, (5618), pp. 480-482. (doi:10.1126/science.1080796).

Record type: Article


The oceans play a major role in defining atmospheric carbon dioxide (CO2) levels, and although the geographical distribution of CO2 uptake and release in the modern ocean is understood, little is known about past distributions. Boron isotope studies of planktonic foraminifera from the western equatorial Pacific show that this area was a strong source of CO2 to the atmosphere between approximately 13,800 and 15,600 years ago. This observation is most compatible with increased frequency of La Niña conditions during this interval. Hence, increased upwelling in the eastern equatorial Pacific may have played an important role in the rise in atmospheric CO2 during the last deglaciation.

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Published date: 2003
Keywords: carbon dioxide, boron isotopes, foraminifera, Pacific Ocean, upwelling, meteorology


Local EPrints ID: 2002
ISSN: 0036-8075
PURE UUID: e81edc4f-4dd5-4977-8e04-519064eecee4

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Date deposited: 07 May 2004
Last modified: 14 Jul 2017 16:31

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Author: M.R. Palmer
Author: P.N. Pearson

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