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A late Quaternary chironomid-inferred temperature record from the Sierra Nevada, California, with connections to northeast Pacific sea surface temperatures |
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| Authors: | Aaron P Potito David F Porinchu Katrina A Moser |
| Institution: | a Department of Geography, The Ohio State University, 1036 Derby Hall, 154 North Oval Mall, Columbus, OH 43210-1361, USA b Department of Geography, University of California-Los Angeles, 1255 Bunche Hall, Los Angeles, CA 90095-1524, USA c Department of Geography, Social Science Centre, The University of Western Ontario, London, Ontario, Canada N6A 5C2 |
| Abstract: | Chironomid remains from a mid-elevation lake in the Sierra Nevada, California, were used to estimate quantitative summer surface water temperatures during the past ∼15,000 yr. Reconstructed temperatures increased by ∼3°C between lake initiation and the onset of the Holocene at ∼10,600 cal yr BP (calibrated years before present). Temperatures peaked at 6500 cal yr BP, displayed high variability from 6500 to 3500 cal yr BP, and stabilized after 3500 cal yr BP. This record generally tracks reconstructed Santa Barbara Basin sea surface temperatures (SSTs) through much of the Holocene, highlighting the correspondence between SST variability and California land temperatures during this interval. |
| Keywords: | Chironomids Holocene Sierra Nevada California Temperature Pacific Ocean Paleolimnology Climate change Holocene thermal maximum |
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