Corals, paleotemperature records, and the aragonite-calcite transformation

Abstract

Research Article| April 01, 1995 Corals, paleotemperature records, and the aragonite-calcite transformation Ivan Gill; Ivan Gill 1Department of Geology, Tulane University, New Orleans, Louisiana 70118 Search for other works by this author on: GSW Google Scholar Jennifer J. Olson; Jennifer J. Olson 1Department of Geology, Tulane University, New Orleans, Louisiana 70118 Search for other works by this author on: GSW Google Scholar Dennis K. Hubbard Dennis K. Hubbard 1Department of Geology, Tulane University, New Orleans, Louisiana 70118 Search for other works by this author on: GSW Google Scholar Author and Article Information Ivan Gill 1Department of Geology, Tulane University, New Orleans, Louisiana 70118 Jennifer J. Olson 1Department of Geology, Tulane University, New Orleans, Louisiana 70118 Dennis K. Hubbard 1Department of Geology, Tulane University, New Orleans, Louisiana 70118 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1995) 23 (4): 333–336. https://doi.org/10.1130/0091-7613(1995)023<0333:CPRATA>2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Ivan Gill, Jennifer J. Olson, Dennis K. Hubbard; Corals, paleotemperature records, and the aragonite-calcite transformation. Geology 1995;; 23 (4): 333–336. doi: https://doi.org/10.1130/0091-7613(1995)023<0333:CPRATA>2.3.CO;2 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 Oxygen isotopic records from corals play an increasing role in paleoclimatic research and climatic modeling. Proxy records of sea-surface temperature are produced by isotopically analyzing samples drilled from aragonitic (CaCO3) coral skeletons. However, drilling aragonite causes a polymorphic inversion to calcite accompanied by 18O enrichment. The isotopic enrichment may occur through atmospheric exchange, CO2 degassing, or fractionation during digestion. Regardless of the mechanism, dry drilling produced isotopic shifts as large as 0.8‰, corresponding to an erroneous temperature decrease of 3 ° C. This error is larger than the global temperature rise since the Industrial Revolution, and a substantial part of the global temperature variation over the past 10 ka. Because the isotopic shift is inconsistent and can occur without the production of measurable calcite, detecting and correcting the isotopic shift may be difficult. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.