PALEOCEANOGRAPHY |
Tropical Pacific Paleocene-Eocene Thermal Maximum(~55Ma) Isotope and Mg/Ca Data
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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, 1551-1554.
Data Coverage |
North: 32.65 * South: 32.65 |
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West: 158.5 * East: 158.5 |
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Altitude: -2387 m |
Data: Please Cite Data Contributors!
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Summary: 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. More Info on Paleoceanography Data |
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Parameters: Delta d18O PDB (Acarinina soldadoensis); Delta d13C PDB (Morozovella velascoensis); Delta d13C PDB (Acarinina soldadoensis); Magnesium/Calcium ratio (Acarinina soldadoensis); Magnesium/Calcium ratio (Morozovella velascoensis); Delta d18O PDB (Morozovella velascoensis)
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Complete XML Record: noaa-ocean-2652
(Last Revised: 2007-12-21 )
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DOC/NOAA/NESDIS/NCDC (National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce ) 325 Broadway, E/CC23 Boulder, CO 80305 USA
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http://www.ncdc.noaa.gov/paleo/ |
E-mail: bruce.a.bauer@noaa.gov |
E-mail: paleo@noaa.gov |
Phone: 303-497-6280 Fax: 303-497-6513
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