Lake Elsinore, California Holocene Grain Size Data Kirby, M.E.; Lund, S.P.; Patterson, W.P.; Anderson, M.A.; Bird, B.W.; Ivanovici, L.; Monarrez, P.; Nielsen, S. Kirby, M.E. Lund, S.P. Patterson, W.P. Anderson, M.A. Bird, B.W. Ivanovici, L. Monarrez, P. Nielsen, S. Pacific Decadal Oscillation earth science/paleoclimate/paleolimnology (depth,null,null,null,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (grain size class,sediment,null,percent,null,paleolimnology,null,null,N,d(0.5) fraction) earth science/paleoclimate/paleolimnology (grain size class,sediment,null,percent,null,paleolimnology,null,null,N,15.6-30.99 fraction) earth science/paleoclimate/paleolimnology (grain size class,sediment,null,percent,null,paleolimnology,null,null,N,250-500 fraction) earth science/paleoclimate/paleolimnology (grain size class,sediment,null,percent,null,paleolimnology,null,null,N,3.9-7.79 fraction) earth science/paleoclimate/paleolimnology (grain size class,sediment,null,percent,null,paleolimnology,null,null,N,31-62.49 fraction) earth science/paleoclimate/paleolimnology (clay,sediment,null,percent,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (silt,sediment,null,percent,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (sand,sediment,null,percent,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (grain size class,sediment,null,percent,null,paleolimnology,null,null,N,62.5-125 fraction) earth science/paleoclimate/paleolimnology (grain size mode,sediment,null,percent,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (grain size class,sediment,null,percent,null,paleolimnology,null,null,N,125-250 fraction) earth science/paleoclimate/paleolimnology (grain size class,sediment,null,percent,null,paleolimnology,null,null,N,d(0.9) fraction) earth science/paleoclimate/paleolimnology (grain size class,sediment,null,percent,null,paleolimnology,null,null,N,500-1000 fraction) earth science/paleoclimate/paleolimnology (grain size class,sediment,null,percent,null,paleolimnology,null,null,N,1000-2000 fraction) earth science/paleoclimate/paleolimnology (sand,sediment,null,percent,null,paleolimnology,normalized,null,N,50-year bins) earth science/paleoclimate/paleolimnology (age,null,null,calendar kiloyear before present,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (grain size class,sediment,null,percent,null,paleolimnology,null,null,N,d(0.1) fraction) earth science/paleoclimate/paleolimnology (grain size class,sediment,null,percent,null,paleolimnology,null,null,N,.02-3.9 fraction) earth science/paleoclimate/paleolimnology (grain size class,sediment,null,percent,null,paleolimnology,null,null,N,7.8-15.59 fraction) earth science/paleoclimate/paleolimnology earth science/paleoclimate/paleolimnology (Lake Elsinore>LATITUDE 33.6733>LONGITUDE -117.3542) High-resolution terrestrial records of Holocene climate from Southern California are scarce. Moreover, there are no records of Pacific Decadal Oscillation (PDO) variability, a major driver of decadal to multi-decadal climate variability for the region, older than 1,000 years. Recent research on Lake Elsinore, however, has shown that the lake's sediments hold excellent potential for paleoenvironmental analysis and reconstruction. New 1-cm contiguous grain size data reveal a more complex Holocene climate history for Southern California than previously recognized at the site. A modern comparison between the twentieth century PDO index, lake level change, San Jacinto River discharge, and percent sand suggests that sand content is a reasonable, qualitative proxy for PDO-related, hydrologic variability at both multi-decadal-to- centennial as well as event (i.e. storm) timescales. A depositional model is proposed to explain the sand-hydrologic proxy. The sand- hydrologic proxy data reveal nine centennial-scale intervals of wet and dry climate throughout the Holocene. Percent total sand values >1.5 standard deviation above the 150-9,700 cal year BP average are frequent between 9,700 and 3,200 cal year BP (n = 41), but they are rare from 3,200 to 150 cal year BP (n = 6). This disparity is interpreted as a change in the frequency of exceptionally wet (high discharge) years and/or changes in large storm activity. A comparison to other regional hydrologic proxies (10 sites) shows more then occasional similarities across the region (i.e. 6 of 9 Elsinore wet intervals are present at >50% of the comparison sites). Only the early Holocene and the Little Ice Age intervals, however, are interpreted consistently across the region as uniformly wet (>=80% of the comparison sites). A comparison to two ENSO reconstructions indicates little, if any, correlation to the Elsinore data, suggesting that ENSO variability is not the predominant forcing of Holocene climate in Southern California. STUDY NOTES: Grain size and sand percentage data from sediments collected in Lake Elsinore, southern California, covering the past 9700 years. All data are reported as volume percent and divided into 10 grain-size intervals as well as d(0.1), d(0.5), d(0.9), %clay, %silt, %sand, and mode. The total percent sand data were standardized by subtracting the mean of the distribution (as calculated between 150 and 9,700 cal year BP) from each observation, and dividing the value by the standard deviation (as calculated between 150 and 9,700 cal-year BP). The standardization process creates a mean of zero with deviations from the mean in units of standard deviation. The standardized data were also binned into 50-year intervals to assess multi-decadal to centennial-scale variability. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Kirby, M.E. Investigator : Lund, S.P. Investigator : Patterson, W.P. Investigator : Anderson, M.A. Investigator : Bird, B.W. Investigator : Ivanovici, L. Investigator : Monarrez, P. Investigator : Nielsen, S. 2011-10-03 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/12200 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/california/elsinore2010.xls https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/california/elsinore2010.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/california/elsinore2010.xls https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/california/elsinore2010.txt English https://www.ncdc.noaa.gov/paleo/study/12200 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/california/elsinore2010.xls https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/california/elsinore2010.txt Kirby, M., S. Lund, W. Patterson, M. Anderson, B. Bird, L. Ivanovici, P. Monarrez, and S. Nielsen. 2010. A Holocene record of Pacific Decadal Oscillation (PDO)-related hydrologic variability in Southern California (Lake Elsinore, CA). Journal of Paleolimnology, Vol. 44, No. 3, pp. 819-839. DOI: 10.1007/s10933-010-9454-0 START YEAR: 9703 cal yr BP * END YEAR: -43 cal yr BP -117.3542 33.6733 -117.3542 33.6733