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Subtropical sea-surface warming and increased salinity during Eocene Thermal Maximum 2

2017; Geological Society of America; Volume: 46; Issue: 2 Linguagem: Inglês

10.1130/g39658.1

1943-2682

Dustin T. Harper, Richard E. Zeebe, Bärbel Hönisch, C. Schrader, Lucas Joost Lourens, James C. Zachos,

Marine Biology and Ecology Research

Research Article| December 20, 2017 Subtropical sea-surface warming and increased salinity during Eocene Thermal Maximum 2 Dustin T. Harper; Dustin T. Harper 1Department of Earth and Planetary Sciences, University of California–Santa Cruz, 1156 High Street, Santa Cruz, California 95064, USA Search for other works by this author on: GSW Google Scholar Richard Zeebe; Richard Zeebe 2School of Ocean and Earth Science and Technology, University of Hawaii at Manoa,1000 Pope Road, MSB 507, Honolulu, Hawaii 96822, USA Search for other works by this author on: GSW Google Scholar Bärbel Hönisch; Bärbel Hönisch 3Department of Earth and Environmental Sciences and Lamont-Doherty Earth Observatory of Columbia University, Geoscience Building, P.O. Box 1000, Palisades, New York 10964, USA Search for other works by this author on: GSW Google Scholar Cindy D. Schrader; Cindy D. Schrader 4Faculty of Geosciences, Utrecht University, 3584 CD Utrecht, Netherlands Search for other works by this author on: GSW Google Scholar Lucas J. Lourens; Lucas J. Lourens 4Faculty of Geosciences, Utrecht University, 3584 CD Utrecht, Netherlands Search for other works by this author on: GSW Google Scholar James C. Zachos James C. Zachos 1Department of Earth and Planetary Sciences, University of California–Santa Cruz, 1156 High Street, Santa Cruz, California 95064, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Dustin T. Harper 1Department of Earth and Planetary Sciences, University of California–Santa Cruz, 1156 High Street, Santa Cruz, California 95064, USA Richard Zeebe 2School of Ocean and Earth Science and Technology, University of Hawaii at Manoa,1000 Pope Road, MSB 507, Honolulu, Hawaii 96822, USA Bärbel Hönisch 3Department of Earth and Environmental Sciences and Lamont-Doherty Earth Observatory of Columbia University, Geoscience Building, P.O. Box 1000, Palisades, New York 10964, USA Cindy D. Schrader 4Faculty of Geosciences, Utrecht University, 3584 CD Utrecht, Netherlands Lucas J. Lourens 4Faculty of Geosciences, Utrecht University, 3584 CD Utrecht, Netherlands James C. Zachos 1Department of Earth and Planetary Sciences, University of California–Santa Cruz, 1156 High Street, Santa Cruz, California 95064, USA Publisher: Geological Society of America Received: 25 Aug 2017 Revision Received: 21 Nov 2017 Accepted: 21 Nov 2017 First Online: 20 Dec 2017 Online Issn: 1943-2682 Print Issn: 0091-7613 © 2017 Geological Society of America Geology (2018) 46 (2): 187–190. https://doi.org/10.1130/G39658.1 Article history Received: 25 Aug 2017 Revision Received: 21 Nov 2017 Accepted: 21 Nov 2017 First Online: 20 Dec 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Dustin T. Harper, Richard Zeebe, Bärbel Hönisch, Cindy D. Schrader, Lucas J. Lourens, James C. Zachos; Subtropical sea-surface warming and increased salinity during Eocene Thermal Maximum 2. Geology 2017;; 46 (2): 187–190. doi: https://doi.org/10.1130/G39658.1 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 Eocene Thermal Maximum 2 (ETM-2; ca. 54.2 Ma) represents the second largest of the major Eocene hyperthermals, yet comparatively little is known about the scale and rate of climatic change for key regions. Here we provide the first detailed records of subtropical sea-surface warming and salinization for ETM-2 at two subtropical locations, Ocean Drilling Program Sites 1209 (North Pacific) and 1265 (South Atlantic). Coupled planktic foraminiferal Mg/Ca and δ18O indicate 2–4 °C of rapid warming and local salinization of ∼1–2 ppt at both sites. The increase in sea-surface temperature is equivalent to anomalies reported from higher latitude sites, and is consistent with theory on the expected pattern of spatial temperature response to greenhouse gas forcing in an ice-free world (i.e., no ice-albedo feedback). Similarly, the observed salinization is consistent with the hypothesis of enhanced meridional vapor transport and increased subtropical aridity in a warmer world. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.