[Parameters: Topic='PALEOCLIMATE', Term='OCEAN/LAKE RECORDS', Variable_Level_1='OXYGEN ISOTOPES']
Tropical Pacific Paleocene-Eocene Thermal Maximum Isotope and Mg/Ca DataEntry ID: NOAA_NCDC_PALEO_2006-006
Abstract: The Paleocene-Eocene Thermal Maximum (PETM) has been attributed to a rapid
rise in greenhouse gas levels. If so, warming should have occurred at all
latitudes, although amplified toward the poles. Existing records reveal an
increase in high-latitude sea surface temperatures (SSTs) (8° to 10°C) and in
bottom water temperatures (4° to 5°C). To date, however, the character of the
tropical SST ... response during this event remains unconstrained. Here we address
this deficiency by using paired oxygen isotope and minor element
(magnesium/calcium) ratios of planktonic foraminifera from a tropical Pacific
core to estimate changes in SST. Using mixed-layer foraminifera, we found that
the combined proxies imply a 4° to 5°C rise in Pacific SST during the PETM.
These results would necessitate a rise in atmospheric pCO2 to levels three to
four times as high as those estimated for the late Paleocene.
Data Set Citation
Dataset Originator/Creator: James Zachos
Dataset Title: Tropical Pacific Paleocene-Eocene Thermal Maximum Isotope and Mg/Ca Data
Dataset Series Name: IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2006-006
Dataset Release Date: 2006-02
Dataset Release Place: Boulder, CO
Dataset Publisher: IGBP PAGES/World Data Center for Paleoclimatology
Issue Identification: 2006-006
Other Citation Details: NOAA/NCDC Paleoclimatology ProgramOnline Resource: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/paleocean/by_contributor/zac...
Paleo Temporal Coverage
Paleo Start Date: 55 Ma
Paleo Stop Date: 0
Data Set Progress
Distribution Media: ftp
University of California, Santa Cruz
City: Santa Cruz
Province or State: CA
Zachos, J.C., M. W. Wara, S. Bohaty, M.L. Delaney, M.R. Petrizzo, A. Brill,
T.J. Bralower, I. Premoli-Silva. 2003. A Transient Rise in Tropical Sea
Surface Temperature During the Paleocene-Eocene Thermal Maximum. Science Vol.
302, pp. 1551 - 1554, 28 November 2003.
Creation and Review Dates
DIF Creation Date: 2006-12-29
Last DIF Revision Date: 2007-08-09