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Summary
Oxygen isotope and Mg/Ca ratios from benthic foraminifera at the Paleocene-
Eocene boundary for 3 ODP sites in the Tropical Oceans.

Abstract:
A rapid increase in greenhouse gas levels is thought to have fueled global
warming at the Paleocene-Eocene Thermal Maximum (PETM). Foraminiferal
magnesium/calcium ratios indicate that bottom waters warmed by 4 ... to 5C,
similar to tropical and subtropical surface ocean waters, implying no
amplification of warming in high-latitude regions of deep-water formation
under ice-free conditions. Intermediate waters warmed before the carbon
isotope excursion, in association with downwelling in the North Pacific and
reduced Southern Ocean convection, supporting changing circulation as the
trigger for methane hydrate release. A switch to deep convection in the North
Pacific at the PETM onset could have amplified and sustained warming.

Geographic Coverage Spatial coordinates   

Data Set Citation

Dataset Creator: Tripati, A. and H. Elderfield Dataset Title: Paleocene-Eocene Thermal Maximum Isotope and Mg/Ca Data Dataset Series Name: IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2005-058 Dataset Release Date: 2005-08 Dataset Release Place: Boulder, CO Dataset Publisher: IGBP PAGES/World Data Center for Paleoclimatology Issue Identification: 2005-058 Online Resource: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/paleocean/by_contributor/tri...

Paleo Temporal Coverage

Paleo Start Date: 55 Ma Paleo Stop Date: 0 Ma Chrono Unit: PHANEROZOIC  >  CENOZOIC  >  PALEOGENE  >  EOCENE Chrono Unit: PHANEROZOIC  >  CENOZOIC  >  PALEOGENE  >  PALEOCENE

Location Keywords

OCEAN > ATLANTIC OCEAN > SOUTH ATLANTIC OCEAN OCEAN > PACIFIC OCEAN > CENTRAL PACIFIC OCEAN OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN

Science Keywords

PALEOCLIMATE > OCEAN/LAKE RECORDS > ISOTOPES PALEOCLIMATE > OCEAN/LAKE RECORDS > MICROFOSSILS PALEOCLIMATE > OCEAN/LAKE RECORDS > OXYGEN ISOTOPES BIOLOGICAL CLASSIFICATION > PROTISTS > AMOEBOIDS > FORAMINIFERS

ISO Topic Category

GEOSCIENTIFIC INFORMATION

Project

PAGES > Past Global Changes, IGBP

Ancillary Keywords

Isotope Global Warming d18O d13C tropical N. Pacific subtropical S. Atlantic equatorial Pacific Mg/Ca Paleocene-Eocene Thermal Maximum

Data Set Progress

COMPLETE

Originating Center

NOAA/NCDC

Data Center

World Data Center for Paleoclimatology, Boulder Data Center URL: http://www.ncdc.noaa.gov/paleo/ Data Center Personnel Name: WDC/PALEOCLIMATOLOGY, BOULDER Phone: +1 (303) 497-6160 Fax: +1 (303) 497-6513 Email: paleo at noaa.gov Contact Address: World Data Center for Paleoclimatology NOAA/NCDC Code E/GCx3 325 Broadway City: Boulder Province or State: CO Postal Code: 80303 Country: USA

Distribution

Distribution Media: ftp Fees: none

Personnel

ARADHNA TRIPATI Role: INVESTIGATOR Contact Address: University of Cambridge Downing Street Department of Earth Sciences City: Cambridge Postal Code: CB2 3EQ Country: United Kingdom H. ELDERFIELD Role: INVESTIGATOR

Related URL

Link: GET DATA Link: GET DATA Description: Access to data and documentation.

Publications/References
Tripati, A. and H. Elderfield. 2005. Deep-Sea Temperature and Circulation
Changes at the Paleocene-Eocene Thermal Maximum. Science, Vol. 308, pp.
1894, 24 June 2005.

Creation and Review Dates

DIF Creation Date: 2006-12-28 Last DIF Revision Date: 2007-08-03

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