Increased northeast Pacific climatic variability during the warm middle Holocene

Plot of oxygen isotope data from piston core AII-125 JPC-76.
Oxygen isotopes from piston core AII-125 JPC-76, taken from the central Santa Barbara Basin.
Increased northeast Pacific climatic variability during the warm middle Holocene
Geophysical Research Letters
Vol. 30, No. 11, 1560 (June 2003)


Julie E. Friddell1, Robert C. Thunell
Dept. of Geol. Sci., Univ. of South Carolina, Columbia, SC, USA

Thomas P. Guilderson2, Michaele Kashgarian
Center for Accelerator Mass Spec., LLNL, Livermore, CA, USA

1 Now at Cold Regions Research and Engr. Lab., Hanover, NH, USA
2 Also at Dept. of Ocean Sci., IMS, Univ. of Calif., Santa Cruz, USA

ABSTRACT:
We use a pair of decadally resolved planktonic foraminiferal d18O records from Santa Barbara Basin (SBB) to show that the warmest interval of the current interglacial, the middle Holocene, was characterized by increased decadal- to centennial-scale climatic variability. Modern relationships between the Pacific Decadal Oscillation (PDO), the El Niño-Southern Oscillation (ENSO), and upper water conditions in SBB also suggest a preference of the northeast (NE) Pacific climate during the warm mid-Holocene toward the warm phase of the PDO and more intense ENSO warm events ("El Niño"). In the context of future climate, this study suggests increasing decadal- to centennial-scale climatic variability in a globally warmed world.

DATA:
Download the data from this study:
Santa Barbara Basin Holocene Stable Oxygen Isotope Data

To read or view the full study, please visit the AGU website.
It was published in Geophysical Research Letters Vol. 30, No. 11, 1560 (June 2003)

This work was supported by the National Science Foundation (USA), Geological Society of America Graduate Research Fellowship, South Carolina Space Grant Consortium (USA), and the US Department of Energy (Contract W 7405-Eng-48).


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6 June 2003