noaa-lake-10749 Bison Lake, Colorado Holocene Calcite Oxygen Isotope Data Anderson, L. Bison Lake, Colorado Holocene Calcite Oxygen Isotope Data 2011-04-06 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/10749 Investigator L. Anderson earth science paleoclimate paleolimnology depth,null,null,centimeter,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology age,null,null,calendar year before present,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology delta 18O,carbonate,null,per mil VPDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,null earth science paleoclimate paleolimnology oxygen isotopes geoscientificInformation hydrology 10201 cal yr BP -58 cal yr BP Complete 39.7653 39.7653 -107.3464 -107.3464 3255 3255 Continent North America United States Of America Colorado Bison Lake>LATITUDE 39.7653>LONGITUDE -107.3464 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 Anderson, L. 2011. Holocene record of precipitation seasonality from lake calcite d18O in the central Rocky Mountains, United States. Geology, Vol. 39, pp. 211-214, March 2011, doi:10.1130/G31575.1

A context for recent hydroclimatic extremes and variability is provided by a ~10 k.y. sediment carbonate oxygen isotope (d18O) record at 5-100 yr resolution from Bison Lake, 3255m above sea level, in northwestern Colorado (United States). Winter precipitation is the primary water source for the alpine headwater lake in the Upper Colorado River Basin and lake water d18O measurements reflect seasonal variations in precipitation d18O. Holocene lake water d18O variations are inferred from endogenic sedimentary calcite d18O based on comparisons with historic watershed discharge records and tree-ring reconstructions. Drought periods (i.e., drier winters and/or a more rain-dominated seasonal precipitation balance) generally correspond with higher calcite d18O values, and vice-versa. Early to middle Holocene d18O values are higher, implying a rain-dominated seasonal precipitation balance. Lower, more variable d18O values after ca. 3500 yr ago indicate a snow-dominated but more seasonally variable precipitation balance. The middle to late Holocene d18O record corresponds with records of El Niño Southern Oscillation intensification that supports a teleconnection between Rocky Mountain climate and North Pacific sea-surface temperatures at decade to century time scales. STUDY NOTES: Calcite oxygen isotope (d18O) data for the Holocene from Bison Lake, northwest Colorado, USA. Calcite-d18O ratios of bulk sediment 32um size fraction from continuous intervals of 0.25 cm from 0 to 5 cm depth, at 1.0 cm intervals from 5 to 69 cm depth and at spaced intervals of 2.0 cm from 69 to 300 cm depth.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/colorado/bison2011.xls GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/colorado/bison2011.txt USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11