Oxygen isotopes from piston core AII-125 JPC-76, taken from the central Santa Barbara Basin.
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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
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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.
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