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Hot summers in the Bighorn Basin during the early Paleogene

2012; Geological Society of America; Volume: 41; Issue: 1 Linguagem: Inglês

10.1130/g33567.1

1943-2682

Kathryn E. Snell, Bridget Thrasher, John M. Eiler, Paul L. Koch, L. C. Sloan, Neil J. Tabor,

Paleontology and Stratigraphy of Fossils

Research Article| January 01, 2013 Hot summers in the Bighorn Basin during the early Paleogene Kathryn E. Snell; Kathryn E. Snell * 1Earth and Planetary Sciences Department, University of California, 1156 High Street, Santa Cruz, California 95064, USA2Department of Geological and Planetary Sciences, California Institute of Technology, 1200 E. California Boulevard, Pasadena, California 91125, USA *E-mail: ksnell@caltech.edu. Search for other works by this author on: GSW Google Scholar Bridget L. Thrasher; Bridget L. Thrasher 1Earth and Planetary Sciences Department, University of California, 1156 High Street, Santa Cruz, California 95064, USA Search for other works by this author on: GSW Google Scholar John M. Eiler; John M. Eiler 2Department of Geological and Planetary Sciences, California Institute of Technology, 1200 E. California Boulevard, Pasadena, California 91125, USA Search for other works by this author on: GSW Google Scholar Paul L. Koch; Paul L. Koch 1Earth and Planetary Sciences Department, University of California, 1156 High Street, Santa Cruz, California 95064, USA Search for other works by this author on: GSW Google Scholar Lisa C. Sloan; Lisa C. Sloan 1Earth and Planetary Sciences Department, University of California, 1156 High Street, Santa Cruz, California 95064, USA Search for other works by this author on: GSW Google Scholar Neil J. Tabor Neil J. Tabor 3Huffington Department of Earth Sciences, Southern Methodist University, P.O. Box 750395, Dallas, Texas 75275, USA Search for other works by this author on: GSW Google Scholar Geology (2013) 41 (1): 55–58. https://doi.org/10.1130/G33567.1 Article history received: 26 Apr 2012 rev-recd: 06 Jul 2012 accepted: 10 Jul 2012 first online: 09 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 Kathryn E. Snell, Bridget L. Thrasher, John M. Eiler, Paul L. Koch, Lisa C. Sloan, Neil J. Tabor; Hot summers in the Bighorn Basin during the early Paleogene. Geology 2013;; 41 (1): 55–58. doi: https://doi.org/10.1130/G33567.1 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 During the early Paleogene, climate in continental interiors is thought to have been warmer and more equable than today, but estimates of seasonal temperature variations during this period are limited. Global and regional climate models of the Paleogene predict cooler temperatures for continental interiors than are implied by proxy data and predict a seasonal range of temperature that is similar to today. Here, we present a record of summer temperatures derived from carbonate clumped isotope thermometry of paleosol carbonates from Paleogene deposits in the Bighorn Basin, Wyoming (United States). Our summer temperature estimates are ∼18 °C greater than mean annual temperature estimated from analysis of fossil leaves. When coupled, these two records yield a seasonal range of temperature similar to that in the region today, with winter temperatures that are near freezing. These data are consistent with our high-resolution climate model output for the Early Eocene in the Bighorn Basin. We suggest that temperatures in continental interiors during the early Paleogene greenhouse were warmer in all seasons, but not more equable than today. If generally true, this removes one of the long-standing paradoxes in our understanding of terrestrial climate dynamics under greenhouse conditions. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.