Zaca Lake, California 3000 Year Sediment Physical and Chemical Data Kirby, M.E.; Feakins, S.J.; Hiner, C.A.; Fantozzi, J.M.; Zimmerman, S.R.H.; Dingemans, T.; Mensing, S. Kirby, M.E. Feakins, S.J. Hiner, C.A. Fantozzi, J.M. Zimmerman, S.R.H. Dingemans, T. Mensing, S. earth science/paleoclimate/paleolimnology (organic matter,sediment,null,percent,null,paleolimnology,null,loss on ignition,N,at 550 degrees C) earth science/paleoclimate/fire history|paleolimnology (charcoal,sediment,null,count per gram,null,fire history|paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (mass magnetic susceptibility,sediment,null,cubic meter per kilogram,null,paleolimnology,null,null,N,x10-7 units) earth science/paleoclimate/paleolimnology (carbonate,sediment,null,percent,null,paleolimnology,null,loss on ignition,N,at 950 degrees C) earth science/paleoclimate/paleolimnology (grain size class,sediment,null,percent,null,paleolimnology,null,laser particle size analysis,N,31.00um-62.49um) earth science/paleoclimate/paleolimnology (grain size class,sediment,null,percent,null,paleolimnology,null,laser particle size analysis,N,500.00um-1000.00um) earth science/paleoclimate/paleolimnology (clay,sediment,null,percent,null,paleolimnology,null,laser particle size analysis,N,null) earth science/paleoclimate/paleolimnology (depth,null,null,centimeter,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (sand,sediment,null,percent,null,paleolimnology,null,laser particle size analysis,N,null) earth science/paleoclimate/paleolimnology (carbon/nitrogen,sediment,null,dimensionless,null,paleolimnology,null,elemental analysis,N,organic carbon/total nitrogen) earth science/paleoclimate/paleolimnology (grain size class,sediment,null,percent,null,paleolimnology,null,laser particle size analysis,N,125um-2000um) earth science/paleoclimate/paleolimnology (grain size class,sediment,null,percent,null,paleolimnology,smoothed,laser particle size analysis,N,>125um 9pt running average) earth science/paleoclimate/paleolimnology (delta 2H,C28 n-alkanoic acid,null,per mil VSMOW,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (grain size class,sediment,null,percent,null,paleolimnology,null,laser particle size analysis,N,0.02-3.89 um) earth science/paleoclimate/paleolimnology (grain size class,sediment,null,percent,null,paleolimnology,null,laser particle size analysis,N,62.50um-124.99um) earth science/paleoclimate/paleolimnology (grain size class,sediment,null,percent,null,paleolimnology,null,laser particle size analysis,N,250.00um-499.99um) earth science/paleoclimate/paleolimnology (silt,sediment,null,percent,null,paleolimnology,null,laser particle size analysis,N,null) earth science/paleoclimate/paleolimnology (grain size class,sediment,null,percent,null,paleolimnology,null,laser particle size analysis,N,3.90um-7.79um) earth science/paleoclimate/paleolimnology (grain size class,sediment,null,percent,null,paleolimnology,null,laser particle size analysis,N,15.60um-30.99um) earth science/paleoclimate/paleolimnology (age,null,null,calendar year before present,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (grain size class,sediment,null,percent,null,paleolimnology,null,laser particle size analysis,N,7.80um-15.59um) earth science/paleoclimate/paleolimnology (grain size class,sediment,null,percent,null,paleolimnology,null,laser particle size analysis,N,125.00um-249.99um) earth science/paleoclimate/paleolimnology (grain size class,sediment,null,percent,null,paleolimnology,null,laser particle size analysis,N,1000.01um-2000.00um) earth science/paleoclimate/paleolimnology earth science/paleoclimate/paleolimnology (Zaca Lake>LATITUDE 34.77778>LONGITUDE -120.0392) The hydrogen isotopic composition of plant molecular markers in modern vegetation and marine sediments in southern California have been intensively studied. Here we report a late Holocene reconstruction from Zaca Lake in coastal southern California, together with modern hydrological and vegetation studies in the catchment. The small catchment and decadal sampling resolution throughout the 9 m, 3000 yr sedimentary record provided a high resolution terrigenous counterpart of nearby marine records from the Santa Barbara Basin. Today, dD values of precipitation average -51.5‰ ± 18 (1sigma, n = 7). Modern plant leaf wax dD values for the C28n-alkanoic acid averaged -141‰ ± 11 (1sigma, n = 10) for Quercus agrifolia, with a calculated fractionation relative to precipitation (Ewax/precip) of -94‰ ± 22 (1sigma, n = 10); in contrast, there was negligible production of the C28 acid by co-dominant Pinus coulteri. Downcore, the C28 acid dD values ranged between -101‰ and -177‰ (mean -150‰ ± 8, 1sigma, n = 490). Abundance distributions suggested that the sedimentary C28 acid was dominated by Quercus, implying that paleoprecipitation varied between extremes of −8‰ and −92‰ (mean −63‰ ± 14, compound 1σ, n = 490). The 3000 yr leaf wax D/H record from Zaca Lake revealed substantial temporal variability, greater than observed in a speleothem reconstruction of similar resolution. We suggest that the plant-based proxy may magnify the variability by sampling spring precipitation preferentially. Centennial-duration positive isotopic excursions were associated with more sub-tropical moisture sources and drier conditions including during the Medieval Climatic Anomaly, and negative excursions were associated with N Pacific sources and wetter conditions including during the Little Ice Age. STUDY NOTES: Zaca Lake, Southern coastal California sediment physical properties (Grain Size, MS, LOI) and geochemical (C/N ratio and leaf wax hydrogen isotope) data spanning the last 3000 years. Leaf wax data previously reported in Feakins et al., 2014. (http://ncdc.noaa.gov/paleo/study/15634). A new age model with the leaf wax data are reported in this study by Kirby et al., 2014. The new age model and data are reported here. Data are from Zaca Lake core 1C (USC-ZACA09-1C), 8.2 Ha lake area, 12m water depth. This record extends to 872cm depth and 3000 years. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Kirby, M.E. Investigator : Feakins, S.J. Investigator : Hiner, C.A. Investigator : Fantozzi, J.M. Investigator : Zimmerman, S.R.H. Investigator : Dingemans, T. Investigator : Mensing, S. 2014-10-22 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/17348 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/california/zaca2014gs.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/california/zaca2014gs.txt English https://www.ncdc.noaa.gov/paleo/study/17348 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/california/zaca2014gs.txt Matthew E. Kirby, Sarah J. Feakins, Christine A. Hiner, Joanna Fantozzi, Susan R.H. Zimmerman, Theodore Dingemans, Scott A. Mensing2014Tropical Pacific forcing of Late-Holocene hydrologic variability in the coastal southwest United StatesQuaternary Science Reviews10227-3810.1016/j.quascirev.2014.08.005http://www.sciencedirect.com/science/article/pii/S0277379114003102 Sarah J. Feakins, Matthew E. Kirby, Michael I. Cheetham, Yadira Ibarra, Susan R.H. Zimmerman2014Fluctuation in leaf wax D/H ratio from a southern California lake records significant variability in isotopes in precipitation during the late HoloceneOrganic Geochemistry6648-5910.1016/j.orggeochem.2013.10.015http://www.sciencedirect.com/science/article/pii/S0146638013002428 START YEAR: 3001 cal yr BP * END YEAR: -58 cal yr BP -120.0392 34.77778 -120.0392 34.77778