noaa-lake-26370 Lake Elsinore, California Late Glacial Biomarker and Isotope Data Feakins, S.J.; Wu, M.S.; Ponton, C.; Tierney, J.E. Lake Elsinore, California Late Glacial Biomarker and Isotope Data 2019-03-26 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/26370 Investigator S.J. Feakins Investigator M.S. Wu Investigator C. Ponton Investigator J.E. Tierney earth science paleoclimate paleolimnology carbon isotopes earth science paleoclimate paleolimnology geochemistry earth science paleoclimate paleolimnology hydrogen isotopes geoscientificInformation 32256 cal yr BP 8788 cal yr BP Complete 33.6733 33.6733 -117.3542 -117.3542 379 379 Continent North America United States Of America California Lake Elsinore>LATITUDE 33.6733>LONGITUDE -117.3542 None Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

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Boulder CO 80305-3328 USA online ASCII Sarah J. Feakins, Mong Sin Wu, Camilo Ponton, Jessica E. Tierney 2019 Earth and Planetary Science Letters 515 164-172 10.1016/j.epsl.2019.03.024 https://www.sciencedirect.com/science/article/pii/S0012821X19301724

Reconstructions of past hydroclimate provide a means to understand precipitation responses to global ocean-atmosphere climate dynamics beyond the scope of that in the instrumental record. Late glacial climate was characterized by abrupt variability in ice and ocean dynamics, however the implications for hydroclimate are not as well known. Here we present organic geochemical proxy evidence for precipitation isotopes based on plant leaf wax hydrogen isotopic compositions (dDwax) and temperature proxy evidence based upon the branched glycerol dialkyl glycerol tetraethers (brGDGTs), that derive from the membrane lipids of bacteria, each extracted from a sedimentary archive in Lake Elsinore, California spanning 32-9 ka. We add proxy evidence for vegetation and salinity from additional biomarker analyses and compare to prior pollen and sedimentological evidence from the same core. Our record indicates a strong deglacial warming of 10C in Lake Elsinore (beginning at 14.5 ka) that accompanied a D-enrichment of precipitation of +90permil and more C4 vegetation (12-10 ka), after a cold, wet and C3-dominated phase (20-14.5 ka), indicating winter-dominated precipitation during the Last Glacial Maximum and Heinrich Stadial 1. During the late glacial (32-20 ka) we find abrupt variability, with precipitation isotopic shifts (~70 permil) that are independent of temperature swings implicating changes in storm track, rather than local temperature as drivers of the precipitation isotope signal. Temperature is however not irrelevant for hydroclimate: we find extreme warmth at 29.4 ka and 26.8 ka, the latter coincident with existing reports of an extended dry period (27.5-25.5 ka), suggesting a long hot and dry interlude during the generally cooler glacial period. We compare dDwax with speleothem d18O from Nevada, also within the winter-dominated precipitation region. Our results corroborate the Last Glacial Maximum and deglacial signals, and fill gaps revealing storm-track instability from 32-20 ka, however the pacing and magnitude of the biomarker signals merit cautious interpretation. STUDY NOTES: Biomarker (plant wax carbon and hydrogen isotopes and GDGTs) data and temperature reconstruction from sediments collected in Lake Elsinore, California, for 32-9 ka BP.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/california/elsinore2019biomarker.txt NOAA Template File; Lake Elsinore Biomarker and Isotope Data USA/NOAA DIF Version 9.8.4 2019-03-29 2019-03-29