# Flower Valley Lake, Southeast Greenland 8800 Year Biogeochemical Data #----------------------------------------------------------------------- # World Data Center for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # NOTE: Please cite original reference when using these data, # plus the Online Resource and date accessed. # # Online_Resource: http://hurricane.ncdc.noaa.gov/pls/paleox/f?p=519:1:::::P1_STUDY_ID:14513 # # Original_Source_URL: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/paleolimnology/greenland/flower-valley2013cn.txt # # Description/Documentation lines begin with # # Data lines have no # # # Archive: Paleolimnology #-------------------- # Contribution_Date # Date: 2013-05-24 #-------------------- # Title # Study_Name: Flower Valley Lake, Southeast Greenland 8800 Year Biogeochemical Data #-------------------- # Investigators # Investigators: Balascio, N.L.; D'Andrea, W.J.; Bradley, R.S.; Perren, B.B. #-------------------- # Description_and_Notes # Description: Biogeochemical data from a 1.6-m sediment core from Flower Valley Lake # on Ammassalik Island spanning the last 8.8 ka. Data include Magnetic susceptibility, # bulk biogeochemical properties (TOC, C/N, d13Corg), lipid biomarkers (n-alkanes; C16 -C31), # hydrogen isotope values (dD) of mid- (n-C25) and long-chain (n-C29, n-C31) n-alkanes. #-------------------- # Publication # Authors: Balascio, N.L., D'Andrea, W.J., Bradley, R.S., Perren, B.B. # Published_Date_or_Year: 2013 # Published_Title: Biogeochemical evidence for hydrologic changes during the Holocene in a lake sediment record from southeast Greenland. # Journal_Name: The Holocene # Volume: in press # Edition: # Issue: # Pages: # DOI: # Abstract: Holocene paleoclimate records from Greenland help us understand the response of the Greenland Ice Sheet and regional oceanic and atmospheric circulation systems to natural climate variability in order to place recent changes in a longer-term perspective. Here biogeochemical analysis of a lake sediment core from southeast Greenland is used to define changes in moisture balance and runoff during the Holocene in a catchment near the margin of the Greenland Ice Sheet. A 1.6-m sediment core that spans the last 8.8 ka was recovered from Flower Valley Lake on Ammassalik Island. Magnetic susceptibility, diatoms, bulk biogeochemical properties (TOC, C/N, d13Corg), and lipid biomarkers (n-alkanes; C16 -C31) reveal changes in clastic sedimentation and the relative input of terrestrial- and aquatic-derived organic matter. Hydrogen isotope values (dD) of mid- (n-C25) and long-chain (n-C29, n-C31) n-alkanes allow reconstruction of dD of precipitation and summertime evaporation of lake water. Following a period of early lake ontogeny and landscape stabilization after deglaciation from 8.4-7.0 ka, the mid-Holocene, 8.4-4.1 ka, is characterized by greater evaporative enrichment of the lake water as indicated by dD records. After 4.1 ka, there is a decrease in evaporative enrichment of the lake water. There is also an abrupt transition to more variable sedimentation marked by sharp increases in magnetic susceptibility, C/N, d13Corg, and the concentration of long-chain n-alkanes, showing periodic delivery of terrestrial organic matter and clastic sediment to the lake. Higher insolation during the mid-Holocene resulted in a warmer and drier climate with longer ice-free periods in the summer and enhanced evaporation of lake water. The reduction in insolation and colder temperatures during the late Holocene caused a reduction in evaporation of lake water over the last 4.1 ka and was accompanied by periodic increases in surface runoff, which correspond with intervals of cold Greenland Ice Sheet surface temperatures. #------------------ # Funding_Agency # Funding_Agency_Name: U.S. National Science Foundation # Grant: #------------------ # Site_Information # Site_Name: Flower Valley Lake # Location: North America>Greenland # Country: # Northernmost_Latitude: 65.6107 # Southernmost_Latitude: 65.6107 # Easternmost_Longitude: -37.6935 # Westernmost_Longitude: -37.6935 # Elevation: 73 m #------------------ # Data_Collection # Collection_Name: FlowerValley2013CN # Earliest_Year: 8771 # Most_Recent_Year: -33 # Time_Unit: Cal year BP # Core_Length: m # Notes: #------------------ # Chronology: # # 14C Chronology # # Depth (cm) 14C Years BP ± Description Laboratory # # 3.5 210Pb # 12 1140 25 Plant/Wood UCI-89381 # 29 1970 35 Plant/Wood OS-89641 # 36 2080 20 Plant/Wood UCI-89382 # 54 1885 20 Plant/Wood UCI-87237 # 63 2180 35 Plant/Wood OS-89642 # 78 3145 20 Plant/Wood UCI-87238 # 103 4010 30 Plant/Wood UCI-89383 # 122 5575 30 Plant/Wood UCI-89384 # 146 7540 80 Plant/Wood UCI-87239 # 151 7375 25 Plant/Wood UCI-89385 # #---------------- # Variables # # Data variables follow (have no #) # Data line variables format: Variables list, one per line, shortname-tab-longname-tab-longname components (9 components: what, material, error, units, seasonality, archive, detail, method, C or N for Character or Numeric data) depth_cm depth, , , cm, , , , ,N age_calBP age, , , calendar years before present, , , , ,N toc% Total organic carbon, , , percent, , , , ,N c/n Carbon/nitrogen ratio (atomic), , , , , , , ,N d13CborgVPDB delta 13C bulk organic, , , per mil VPDB, , , , ,N #---------------- # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Values: depth_cm age_calBP toc% c/n d13CborgVPDB 0.5 -33 0.9414 7.1652 -26.0956 1 -7 1.44 8.7097 -27.518 1.5 20 2.4174 10.5626 -27.4202 2 47 2.613 11.9914 -27.0202 2.5 73 2.4695 10.4752 -27.438 3 100 2.1155 10.8382 -26.6458 3.5 152 3.0907 12.0256 -27.1703 4 204 3.0388 11.3092 -27.9833 4.5 256 2.3642 11.7423 -27.3343 5 308 1.7139 10.6735 -26.9629 5.5 360 1.8873 10.9847 -28.9701 6 412 1.2818 9.8611 -28.087 6.5 465 1.9743 9.9618 -28.5299 7 517 1.2482 10.9668 -28.2875 7.5 569 2.054 11.2771 -27.0281 8 621 2.7471 11.2541 -27.2859 8.5 673 2.8351 12.2335 -27.0281 9 725 2.7622 11.4309 -28.5078 9.5 777 0.5721 9.171 -28.8466 10 829 2.409 10.731 -27.4904 10.5 881 2.9975 11.7903 -28.3577 11 933 3.6421 12.49 -28.1976 11.5 985 2.9204 12.3877 -28.22 12 1037 2.7679 12.4231 -28.2342 12.5 1089 2.6771 11.7835 -28.4752 13 1142 2.9222 11.754 -28.5058 13.5 1194 5.4896 17.4499 -27.4005 14 1246 2.5788 11.3129 -27.5388 14.5 1298 3.4247 14.2747 -26.4957 15 1350 4.416 15.5575 -26.0739 16 1454 4.4956 17.6252 -25.7025 17 1558 2.5335 10.9195 -26.0363 18 1662 2.7323 11.5389 -28.5417 19 1766 3.5046 11.906 -27.6494 53 1776 3.5218 17.5534 -25.0249 54 1835 2.4623 14.2476 -25.6501 55 1894 1.8442 11.7103 -25.973 56 1953 2.5163 11.0795 -25.7656 57 2012 2.8264 12.0775 -26.1438 58 2072 2.5476 11.6326 -26.4756 59 2131 2.5273 13.0394 -25.33 60 2192 2.6867 10.0557 -25.186 61 2253 2.3937 10.0062 -25.2965 62 2314 2.2285 13.5589 -25.1494 63 2377 1.8803 13.7226 -25.1454 64 2440 1.9723 14.7047 -26.0026 65 2503 1.369 14.5568 -25.7705 66 2568 1.015 12.7236 -25.3735 67 2632 2.1378 13.6743 -26.0727 68 2697 2.873 13.2806 -26.8341 69 2761 3.7549 13.8919 -27.0168 70 2826 3.0255 14.1437 -27.0711 71 2889 2.8578 11.0652 -27.475 72 2953 4.1639 10.8419 -27.3605 73 3015 3.7221 12.7427 -27.5698 74 3077 2.7426 13.8566 -27.5053 75 3137 3.2615 14.9648 -27.4481 76 3196 3.0097 13.2494 -27.3396 77 3254 3.8084 14.3292 -27.5734 78 3309 2.8148 13.6512 -27.093 79 3364 3.133 13.8763 -26.9707 80 3416 3.528 14.7475 -27.0555 81 3468 3.7799 15.3375 -26.7398 82 3518 4.0947 16.1677 -26.9933 83 3568 4.9191 16.5733 -27.6375 84 3616 3.5136 16.4241 -27.8427 85 3664 2.7036 14.8888 -27.5546 86 3712 2.9133 15.2261 -27.3258 87 3760 1.8472 16.1129 -26.5583 88 3807 1.7452 19.5487 -25.9043 89 3855 2.2273 18.7864 -25.8122 90 3903 4.2133 19.8976 -25.829 91 3952 3.7174 16.0729 -25.6153 92 4002 4.1587 16.7372 -26.2545 93 4052 4.6181 14.8367 -26.7448 94 4104 4.1293 14.7577 -26.7714 95 4157 3.5941 13.4206 -26.3729 96 4211 3.8106 12.9154 -26.8868 97 4268 3.1235 12.8859 -26.7102 98 4326 3.2774 13.4524 -27.0989 99 4386 3.5977 14.1032 -26.653 100 4448 3.244 13.3573 -26.6945 101 4513 3.085 12.8375 -26.7388 102 4581 3.5724 11.7249 -26.9623 103 4651 3.1415 12.2123 -26.9988 104 4724 3.2797 14.4204 -26.6405 105 4800 3.4094 12.8157 -26.9186 106 4878 3.3764 12.2698 -26.9258 107 4958 3.3139 12.7503 -26.8736 108 5041 3.429 11.8533 -26.625 109 5125 3.645 11.9163 -26.8173 110 5211 3.6607 11.9087 -26.7108 111 5298 3.4472 12.3565 -26.2186 112 5387 3.0598 11.8073 -26.3972 113 5476 3.3538 11.9972 -26.5688 114 5566 3.4904 11.9811 -26.4544 115 5657 3.1434 12.075 -26.264 116 5748 2.712 11.7941 -26.338 117 5840 3.2893 12.4071 -26.3301 118 5931 3.3668 12.0497 -25.7028 119 6023 3.5372 10.367 -25.6034 120 6114 3.5744 12.058 -25.6015 121 6204 3.7705 11.6695 -26.4642 122 6293 3.5955 13.3328 -26.5323 123 6382 4.7745 15.192 -26.4701 124 6470 4.5555 14.8868 -26.5234 125 6556 3.8575 11.864 -26.0164 126 6641 3.5001 11.3422 -26.5214 127 6726 3.5047 11.1941 -26.4031 128 6809 3.3488 10.5804 -26.2344 129 6891 3.5518 11.0658 -26.6585 130 6971 3.4057 10.9769 -26.5757 131 7051 3.5843 10.9867 -25.9836 132 7129 3.3406 11.6612 -26.5668 133 7206 3.7893 12.5281 -26.3942 134 7282 3.5826 11.4658 -25.2937 135 7356 3.9329 10.821 -26.1085 136 7429 3.6122 11.7489 -26.2038 137 7501 3.3247 10.9348 -26.1959 138 7571 1.759 11.5188 -26.0046 139 7640 1.4189 12.0389 -25.544 140 7707 2.1574 11.3213 -25.4138 141 7773 1.568 11.9767 -25.2786 142 7837 1.6581 11.0033 -25.2096 143 7900 1.8141 11.7583 -25.3418 144 7961 3.6156 11.1262 -25.9452 145 8020 5.3305 13.5784 -26.2077 146 8078 4.3044 10.9462 -26.18 147 8134 4.863 11.6148 -26.5115 148 8189 4.7764 12.2834 -26.6259 149 8243 4.0836 10.9653 -25.7662 150 8296 4.2094 12.9231 -26.2732 151 8349 3.8394 11.2806 -26.1771 152 8402 3.5454 11.0149 -25.5733 153 8454 1.0785 11.2202 -24.8127 154 8507 2.4306 12.2219 -25.4342 155 8560 3.1415 11.4062 -25.9936 156 8613 1.7119 11.034 -25.5832 157 8666 0.1864 4.0197 -25.4816 158 8718 0.3639 8.094 -25.8377 159 8771 0.2401 8.3598 -24.9429