Yellow Lake, Colorado Holocene Calcite Oxygen Isotope Data ----------------------------------------------------------------------- World Data Center for Paleoclimatology, Boulder and NOAA Paleoclimatology Program ----------------------------------------------------------------------- NOTE: Please cite original reference when using these data, plus the data file URL and date accessed. NAME OF DATA SET: Yellow Lake, Colorado Holocene Calcite Oxygen Isotope Data LAST UPDATE: 7/2012 (Original receipt by WDC Paleo) CONTRIBUTOR: Anderson, L. IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2012-108 WDC PALEO CONTRIBUTION SERIES CITATION: Anderson, L. 2012. Yellow Lake, Colorado Holocene Calcite Oxygen Isotope Data. IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series # 2012-108. NOAA/NCDC Paleoclimatology Program, Boulder CO, USA. ORIGINAL REFERENCE: Anderson, L. 2012. Rocky Mountain Hydroclimate: Holocene variability and the role of insolation, ENSO and the North American Monsoon. Global and Planetary Change, Vol. 92-93, pp. 198-208 doi:10.1016/j.gloplacha.2012.05.012 ABSTRACT: Over the period of instrumental records, precipitation maximum in the headwaters of the Colorado Rocky Mountains has been dominated by winter snow, with a substantial degree of interannual variability linked to Pacific ocean-atmosphere dynamics. High-elevation snowpack is an important water storage that is carefully observed in order to meet increasing water demands in the greater semi-arid region. The purpose here is to consider Rocky Mountain water trends during the Holocene when known changes in earth's energy balance were caused by precession-driven insolation variability. Changes in solar insolation are thought to have influenced the variability and intensity of the El Niño Southern Oscillation (ENSO), Pacific Decadal Oscillation (PDO), and North American Monsoon and the seasonal precipitation balance between rain and snow at upper elevations. Holocene records are presented from two high elevation lakes located in northwest Colorado that document decade-to-century scale precipitation seasonality for the past ~7000 years. Comparisons with sub-tropical records of ENSO indicate that the snowfall-dominated precipitation maxima developed ~3000 and 4000 years ago, coincident with evidence for enhanced ENSO/PDO dynamics. During the early-to-mid Holocene the records suggest a more monsoon affected precipitation regime with reduced snowpack, more rainfall, and net moisture deficits that were more severe than recent droughts. The Holocene perspective of precipitation indicates a far broader range of variability than that of the past century and highlights the non-linear character of hydroclimate in the U.S. west. GEOGRAPHIC REGION: Western North America PERIOD OF RECORD: 8,000 YrBP - present FUNDING SOURCE: U.S. Geological Survey Climate and Land Use Program DATA FILE URLS: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/colorado/yellow2012.txt ftp://ftp.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/colorado/yellow2012.xls DESCRIPTION: Calcite oxygen isotope (d180) data for the Holocene from Yellow Lake, northwest Colorado, USA. Calcite-d18O ratios of bulk sediment 32um size fraction from continuous intervals of 0.5 cm from 0 to 24 cm depth, at spaced intervals of 0.5 cm from 24 to 70 cm depth and at spaced intervals of 2.0 cm from 70 to 224 cm depth. See text for discussion on changes in lake hydrology from an open to closed basin by ~3 ka and implications for interpretation. Isotopic enrichment due to evaporation is the d18O difference from nearby Bison Lake (Dd18OYel-Bis) calculated from 11-interval running averages of calibrated ages that were within age errors. Yellow Lake, Colorado, USA: 39.652°N, 107.345°W, 3170m elev DATA: 1. Anderson 2012 Yellow Lake AMS Radiocarbon Dates Depth(cm) RadiocarbonAge±error CalibratedAge(yrBP) CalibratedAgeError(1S) 0 Core top -56 19 548 ± 67 577 60 44 2186 ± 70 2217 94 85 3180 ± 45 3410 37 127 Dotsero Tephra 5180 Determined from Bison Lake Age Model - see text for discussion 140 5115 ± 30 5840 77 188 5725 ± 30 6506 52 202 6235 ± 30 7140 109 216 7200 ± 35 8015 47 241 8900 ± 35 10047 116 For material and calibration details see Global and Planetary Change Supplemental Materials, http:// dx.doi.org/10.1016/j.gloplacha.2012.05.012. 2. Anderson 2012 Yellow Lake calcite d18O data Depth(cm) CalYrBP d18O(VPDB) 0.00 -56 -12.53 0.25 -48 -12.94 0.75 -31 -13.42 1.25 -14 -13.02 1.75 2 -12.93 2.25 19 -12.64 2.75 36 -12.96 3.25 52 -13.00 3.75 69 -12.84 4.25 86 -12.67 4.75 102 -13.69 5.25 119 -14.02 5.75 136 -13.84 6.25 152 -13.47 6.75 169 -13.31 7.25 186 -13.47 7.75 202 -13.38 8.25 238 -13.52 8.75 271 -13.49 9.25 304 -12.97 9.75 337 -13.00 10.25 369 -13.54 10.75 402 -14.17 11.25 434 -13.68 11.75 466 -13.67 12.25 498 -13.38 12.75 529 -13.82 13.25 561 -13.74 13.75 592 -13.81 14.25 623 -13.59 14.75 654 -13.18 15.25 685 -13.52 15.75 716 -13.25 16.25 747 -13.18 16.75 777 -12.45 17.25 807 -12.56 17.75 837 -12.78 18.25 867 -12.82 18.75 897 -12.58 19.25 926 -13.48 19.75 956 -13.69 20.25 985 -13.66 20.75 1014 -13.65 21.75 1071 -13.31 22.25 1100 -13.43 22.75 1129 -13.58 23.25 1157 -14.00 24.00 1199 -13.62 24.50 1227 -13.44 25.00 1255 -13.46 25.50 1282 -12.93 26.00 1310 -12.99 26.50 1337 -13.20 27.00 1364 -13.40 27.50 1391 -13.42 28.00 1418 -13.36 28.50 1445 -13.83 29.00 1471 -13.46 29.50 1497 -14.35 30.00 1524 -13.24 30.50 1550 -13.14 31.00 1576 -13.92 31.50 1602 -13.79 32.00 1627 -13.46 32.50 1653 -13.46 33.00 1678 -13.72 33.50 1704 -14.03 34.00 1729 -13.03 34.50 1754 -13.50 35.00 1779 -13.13 35.50 1803 -13.65 36.00 1828 -13.70 36.50 1852 -13.56 37.00 1877 -13.34 37.50 1901 -13.01 38.00 1925 -13.02 38.50 1949 -13.42 39.00 1972 -13.56 39.50 1996 -12.65 40.00 2020 -13.67 40.50 2043 -12.69 41.00 2066 -13.77 41.50 2089 -13.66 42.00 2112 -13.31 42.50 2135 -13.41 43.00 2158 -13.52 44.00 2203 -13.90 44.50 2226 -13.12 45.00 2248 -13.64 45.50 2270 -12.80 46.00 2292 -13.62 46.50 2314 -14.53 47.00 2336 -14.04 47.50 2357 -13.58 48.00 2379 -12.70 48.50 2400 -13.25 49.00 2421 -13.94 49.50 2443 -13.34 50.00 2464 -13.42 50.50 2485 -13.66 51.00 2506 -13.57 51.50 2526 -14.22 52.00 2547 -13.97 52.50 2567 -13.88 53.00 2588 -13.35 53.50 2608 -14.06 54.00 2628 -14.01 54.50 2648 -13.72 55.00 2668 -13.50 55.50 2688 -13.77 56.00 2708 -13.71 56.50 2728 -13.97 57.00 2747 -14.03 57.50 2767 -13.90 58.00 2786 -13.67 58.50 2805 -13.96 59.00 2824 -14.21 59.50 2843 -13.44 60.00 2862 -13.57 60.50 2881 -13.46 61.00 2900 -13.37 61.50 2918 -13.44 62.00 2937 -13.30 62.50 2955 -13.93 63.00 2974 -13.48 63.50 2992 -13.73 64.00 3010 -13.74 64.50 3028 -13.65 65.00 3046 -13.73 65.50 3064 -13.37 66.00 3082 -14.03 66.50 3100 -13.86 67.00 3117 -14.06 67.50 3135 -14.30 68.00 3152 -14.06 68.50 3170 -13.75 69.00 3187 -13.17 69.50 3204 -13.53 70.00 3221 -13.76 71.00 3255 -13.43 73.00 3322 -13.57 75.00 3388 -12.49 77.00 3452 -12.95 79.00 3515 -12.99 81.00 3577 -13.72 83.00 3638 -12.91 85.00 3698 -13.12 87.00 3757 -13.23 89.00 3815 -13.29 91.00 3873 -13.60 93.00 3929 -13.33 95.00 3984 -13.39 97.00 4039 -12.97 99.00 4093 -13.07 101.00 4147 -13.25 103.00 4200 -13.69 105.00 4252 -12.72 107.00 4304 -13.63 109.00 4355 -13.69 111.00 4406 -12.68 115.00 4507 -13.18 117.00 4557 -13.23 119.00 4607 -13.32 121.00 4657 -12.42 123.00 4706 -11.74 125.00 4756 -12.29 127.00 4805 -13.39 129.00 4855 -13.35 131.00 4904 -13.07 133.00 4954 -12.47 135.00 5004 -13.32 137.00 5054 -12.96 139.00 5104 -13.12 141.00 5155 -13.30 143.00 5206 -13.03 145.00 5257 -12.64 147.00 5309 -12.92 149.00 5362 -12.52 151.00 5415 -12.39 153.00 5468 -12.74 155.00 5522 -12.64 154.00 5495 -12.76 156.00 5550 -12.84 158.00 5605 -12.81 160.00 5661 -12.67 162.00 5718 -12.78 164.00 5776 -13.01 166.00 5835 -12.75 168.00 5894 -11.74 170.00 5955 -12.68 172.00 6017 -12.58 174.00 6080 -12.14 176.00 6144 -12.57 178.00 6209 -12.28 180.00 6276 -12.91 182.00 6343 -12.68 184.00 6413 -12.64 186.00 6483 -12.44 188.00 6555 -12.85 190.00 6629 -12.67 192.00 6704 -12.39 194.00 6780 -12.80 195.50 6839 -12.25 196.50 6879 -12.08 197.50 6919 -13.03 198.50 6959 -13.81 199.50 7000 -12.90 200.00 7020 -12.65 204.00 7189 -11.93 214.00 7645 -12.90 224.00 8155 -11.50 3. Anderson 2012 Yellow and Bison Lakes d18O differences calyrBP* Dd18OYel-Bis(‰) 19 3.94 36 4.28 52 4.16 86 4.02 102 3.91 119 3.80 152 3.65 169 3.51 186 3.42 202 3.40 238 3.35 271 3.45 304 3.71 337 3.71 369 3.61 402 3.42 434 3.32 466 3.30 498 3.30 529 3.16 561 3.00 592 2.80 623 2.84 654 2.88 685 2.82 716 2.88 747 2.99 777 3.51 807 3.67 837 3.60 867 3.39 897 2.92 926 2.93 956 2.99 985 2.73 1014 2.54 1071 2.35 1100 2.22 1129 2.13 1157 2.14 1199 2.27 1227 2.38 1255 2.44 1282 2.48 1310 2.54 1337 2.53 1364 2.56 1391 2.53 1418 2.53 1445 2.62 1471 2.59 1524 2.47 1576 2.51 1627 2.71 1678 2.86 1754 2.78 1803 2.78 1852 2.88 1901 2.82 1949 2.93 2020 3.01 2066 2.95 2135 2.88 2181 2.70 2226 2.53 2292 2.60 2357 2.59 2400 2.39 2464 2.19 2526 1.98 2588 1.86 2648 1.85 2708 1.76 2767 1.71 2824 1.74 2900 1.90 2955 2.01 3010 2.04 3082 1.86 3135 1.85 3204 1.92 3255 2.11 3322 2.16 3388 2.22 3452 2.23 3515 2.22 3577 2.15 3698 2.02 3757 1.87 3815 1.88 3873 1.92 3929 1.95 4039 1.89 4093 1.85 4147 1.84 4200 1.96 4252 2.00 4304 2.03 4406 2.06 4507 2.18 4557 2.25 4657 2.23 4706 2.32 4756 2.34 4855 2.33 4954 2.28 5004 2.06 5104 2.06 5155 2.08 5257 2.18 5362 2.23 5415 2.22 5468 2.24 5495 2.26 5550 2.30 5605 2.28 5718 2.35 5776 2.30 5894 2.38 6017 2.29 6144 2.37 6209 2.44 6276 2.28 6413 2.32 6483 2.17 6555 2.18 6629 2.17 6704 2.15 6879 2.01 6959 2.05