Atmospheric pCO2 since 60 Ma from records of seawater pH, calcium, and primary carbonate mineralogy

Research Article| September 01, 2003 Atmospheric pCO2 since 60 Ma from records of seawater pH, calcium, and primary carbonate mineralogy Robert V. Demicco; Robert V. Demicco 1Department of Geological Sciences, State University of New York at Binghamton, Binghamton, New York 13902-6000, USA Search for other works by this author on: GSW Google Scholar Tim K. Lowenstein; Tim K. Lowenstein 1Department of Geological Sciences, State University of New York at Binghamton, Binghamton, New York 13902-6000, USA Search for other works by this author on: GSW Google Scholar Lawrence A. Hardie Lawrence A. Hardie 2Department of Earth and Planetary Sciences, Johns Hopkins University, Baltimore, Maryland 21218, USA Search for other works by this author on: GSW Google Scholar Geology (2003) 31 (9): 793–796. https://doi.org/10.1130/G19727.1 Article history received: 08 Apr 2003 rev-recd: 29 May 2003 accepted: 30 May 2003 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Robert V. Demicco, Tim K. Lowenstein, Lawrence A. Hardie; Atmospheric pCO2 since 60 Ma from records of seawater pH, calcium, and primary carbonate mineralogy. Geology 2003;; 31 (9): 793–796. doi: https://doi.org/10.1130/G19727.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract A 60 m.y. record of atmospheric pCO2 has been refined from knowledge of (1) secular changes in the major ion composition of seawater (particularly Ca and Mg) and (2) oscillations in the mineralogy of primary oceanic carbonate sediments. Both factors have had a significant impact on the chemistry of the ocean carbonate buffer system. Calculated atmospheric pCO2 oscillated between values of 100–300 ppm and to maxima of 1200–2500 ppm from 60 to 40 Ma and varied between 100 and 300 ppm from 25 Ma to the present. The refined pCO2 values are significantly lower than previous estimates made from seawater pH data where total dissolved inorganic carbon was assumed constant and more in line with modeling and stomatal index estimations of atmospheric pCO2 for the Tertiary. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.