Glacial to interglacial changes in atmospheric carbon dioxide: the critical role of ocean surface water in high latitudes.

J. R. Toggweiler, Jorge Louis Sarmiento

Research output: Contribution to journalArticle

99 Scopus citations

Abstract

We follow up here on a proposal by Sarmiento and Toggweiler that glacial to interglacial changes in PCO2 are related to changes in the nutrient content of high-latitude surface water. We develop a 4-box model of the ocean and atmosphere which includes low- and high-latitude surface boxes, an atmosphere, and a deep ocean. We propose that the low ice age PCO2 can be produced by a reduction in local exchange between high-latitude surface water and deep water. The model requires that the current exchange rate of about 50Sv be reduced to about 10Sv. We review evidence in the geologic record for widespread changes in deep convection around Antarctica about 14 000yr ago which are synchronous with the change in atmospheric PCO2.-from Authors

Original languageEnglish (US)
Pages (from-to)163-184
Number of pages22
JournalUnknown Journal
StatePublished - Jan 1 1985

All Science Journal Classification (ASJC) codes

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

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