Lake Elsinore, California 32-10ky Physical Properties and Pollen Data Kirby, M.E.; Heusser, L.E.; Scholz, C.A.; Ramezan, R.; Anderson, M.A.; Markle, B.R.; Rhodes, E.; Glover, K.C.; Fantozzi, J.M.; Hiner, C.A.; Price, B.; Rangel, H. Kirby, M.E. Heusser, L.E. Scholz, C.A. Ramezan, R. Anderson, M.A. Markle, B.R. Rhodes, E. Glover, K.C. Fantozzi, J.M. Hiner, C.A. Price, B. Rangel, H. earth science/paleoclimate/paleolimnology earth science/paleoclimate/paleolimnology (Lake Elsinore>LATITUDE 33.6733>LONGITUDE -117.3542) Continuous, sub-centennially resolved, paleo terrestrial records are rare from arid environments such as the Pacific south-west United States. Here, we present a multi-decadal to centennial resolution sediment core (Lake Elsinore, CA) to reconstruct late Wisconsin pluvials, droughts and vegetation. In general, the late Wisconsin is characterized by a wetter and colder climate than during the Holocene. Specifically, conditions between 32.3 and 24.9k cal a BP are characterized by large-amplitude hydrologic and ecologic variability. Highlighting this period is a ~2000-year glacial mega-drought (27.6-25.7k cal a BP) during which the lake shallowed (3.2-4.5m depth). This period is approximately coeval with a Lake Manix regression and an increase in xeric vegetation in the San Bernardino Mountains (Baldwin Lake). The Local Last Glacial Maximum (LLGM) is bracketed between 23.3 and 19.7k cal a BP - a ~3000-year interval characterized by reduced run-off (relative to the glacial), colder conditions and vegetative stability. Maximum sustained wetness follows the LLGM, beginning at 19.7 and peaking by 14.4k cal a BP. A two-step decrease in runoff characterizes the Lateglacial to Holocene transition; however, the vegetation change is more complex, particularly at the beginning of the Younger Dryas chronozone. By 12.6-12.4k cal a BP, the climate achieved near Holocene conditions. STUDY NOTES: Sediment physical properties and pollen data from Lake Elsinore, California for 32-10ky. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Kirby, M.E. Investigator : Heusser, L.E. Investigator : Scholz, C.A. Investigator : Ramezan, R. Investigator : Anderson, M.A. Investigator : Markle, B.R. Investigator : Rhodes, E. Investigator : Glover, K.C. Investigator : Fantozzi, J.M. Investigator : Hiner, C.A. Investigator : Price, B. Investigator : Rangel, H. 2019-05-31 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/26930 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/california/elsinore2018physprop.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/california/elsinore2018pollen.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/california/elsinore2018physprop.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/california/elsinore2018pollen.txt English https://www.ncdc.noaa.gov/paleo/study/26930 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/california/elsinore2018physprop.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/california/elsinore2018pollen.txt M.E. Kirby, L. Heusser, C. Scholz, R. Ramezan, M.A. Anderson, B. Markle, E. Rhodes, K.C. Glover, J. Fantozzi, C. Hiner, B. Price, H. Rangel2018A late Wisconsin (32-10k cal a BP) history of pluvials, droughts and vegetation in the Pacific south-west United States (Lake Elsinore, CA)Journal of Quaternary Science332238-25410.1002/jqs.3018https://onlinelibrary.wiley.com/doi/abs/10.1002/jqs.3018 START YEAR: 32292 cal yr BP * END YEAR: 6756 cal yr BP -117.3542 33.6733 -117.3542 33.6733