[Parameters: Topic='PALEOCLIMATE', Term='OCEAN/LAKE RECORDS', Variable_Level_1='OXYGEN ISOTOPES']
Paleocene-Eocene Thermal Maximum Isotope and Mg/Ca DataEntry ID: NOAA_NCDC_PALEO_2005-058
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.
(Click for Interactive Map)
Data Set Citation
Dataset Originator/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
Other Citation Details: NOAA/NCDC Paleoclimatology ProgramOnline Resource: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/paleocean/by_contributor/tri...
Paleo Temporal Coverage
ISO Topic Category
Data Set Progress
Distribution Media: ftp
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