# Aishihik Basin, Yukon 12,000 Year Multiproxy Lake Sediment Data #----------------------------------------------------------------------- # World Data Center for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # NOTE: Please cite Publication, and Online_Resource and date accessed when using these data. # If there is no publication information, please cite Investigators, Title, and Online_Resource and date accessed. # # # Online_Resource: http://ncdc.noaa.gov/paleo/study/18435 # # Original_Source_URL: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/yukon/aishihik2013pollen-conc.txt # # Description/Documentation lines begin with # # Data lines have no # # # Archive: Paleolimnology #-------------------- # Contribution_Date # Date: 2015-03-20 #-------------------- # Title # Study_Name: Aishihik Basin, Yukon 12,000 Year Multiproxy Lake Sediment Data #-------------------- # Investigators # Investigators: Rainville, R.A.; Gajewski, K. #-------------------- # Description_and_Notes # Description: Multiproxy sediment data from Lake WA01, Aishihik Basin, southwest Yukon, Canada. Data include pollen counts, # sediment physical properties, and charcoal concentration. #-------------------- # Publication # Authors: Rebecca A. Rainville and Konrad Gajewski # Published_Date_or_Year: 2013-04-01 # Published_Title: Holocene environmental history of the Aishihik Region, Yukon, Canada # Journal_Name: Canadian Journal of Earth Sciences # Volume: 50 # Edition: # Issue: 4 # Pages: 397-405 # DOI: 10.1139/cjes-2012-0103 # Online_Resource: http://cjes.geoscienceworld.org/content/50/4/397.abstract # Full_Citation: # Abstract: A 2.7 m sediment core from WA01, a small pond in Southwest Yukon, Canada (unofficial name, 61 14'41"N, 136 55'35"W, 1000 m above sea level), documents the postglacial vegetation and climate history of the Aishihik Basin. Open birch-shrub tundra established at the site ca. 10 900 cal years BP, immediately after deglaciation. Picea glauca established ca. 10 200 cal years BP, and an open spruce forest ecosystem has since remained dominant on the landscape. A gradual increase in Alnus crispa, starting ca. 6600 cal years BP, has also been noted in other studies from Central Yukon, suggesting a significant climate transition in Yukon at this time. An alternating pattern in sediment loss-on-ignition, also beginning ca. 6600 cal years BP, may be broadly related to trends in ∂18O values from the Mount Logan and Jellybean Lake oxygen isotope records, and is most likely reflective of periodic changes in available moisture in the region resulting from alterations in the strength and position of the Aleutian Low pressure system. However, millennial-scale climate variability identified in ice core and sediment records had little impact on the forests of the region. #------------------ # Funding_Agency # Funding_Agency_Name: Natural Sciences and Engineering Research Council of Canada # Grant: #------------------ # Site_Information # Site_Name: Lake WA01 # Location: North America>Canada>Yukon Territory # Country: Canada # Northernmost_Latitude: 61.2447 # Southernmost_Latitude: 61.2447 # Easternmost_Longitude: -136.9264 # Westernmost_Longitude: -136.9264 # Elevation: 1000 m #------------------ # Data_Collection # Collection_Name: WA01pollen-conc # Earliest_Year: 12906 # Most_Recent_Year: -57 # Time_Unit: Cal. Year BP # Core_Length: m # Notes: #------------------ # Chronology: # # WA01 Chronology Information # Mean cm age plus errors cal years BP # Mean cm low upp age lower upper # 1 210Pb 0.25 0 0.5 -58.1 -58.1 -58.1 # 2 210Pb 0.75 0.5 1 -57.7 -57.7 -57.7 # 3 210Pb 1.25 1 1.5 -57.3 -57.3 -57.3 # 4 210Pb 1.75 1.5 2 -56.5 -56.5 -56.5 # 5 210Pb 2.25 2 2.5 -55.9 -55.9 -55.9 # 6 210Pb 2.75 2.5 3 -55.3 -55.3 -55.3 # 7 210Pb 3.25 3 3.5 -54.3 -54.3 -54.3 # 8 210Pb 3.75 3.5 4 -53.0 -53.0 -53.0 # 9 210Pb 4.25 4 4.5 -51.7 -51.7 -51.7 # 10 210Pb 4.75 4.5 5 -50.0 -50.0 -50.0 # 11 210Pb 5.25 5 5.5 -47.8 -47.8 -47.8 # 12 210Pb 5.75 5.5 6 -46.1 -46.1 -46.1 # 13 210Pb 6.25 6 6.5 -44.7 -44.7 -44.7 # 14 210Pb 6.75 6.5 7 -42.2 -42.2 -42.2 # 15 210Pb 7.25 7 7.5 -39.5 -39.5 -39.5 # 16 210Pb 7.75 7.5 8 -37.5 -37.5 -37.5 # 17 210Pb 8.25 8 8.5 -35.2 -35.2 -35.2 # 18 210Pb 8.75 8.5 9 -33.0 -33.0 -33.0 # 19 210Pb 9.25 9 9.5 -30.8 -30.8 -30.8 # 20 210Pb 9.75 9.5 10 -28.2 -28.2 -28.2 # 21 210Pb 10.25 10 10.5 -25.3 -25.3 -25.3 # 22 210Pb 10.75 10.5 11 -22.5 -22.5 -22.5 # 23 210Pb 11.25 11 11.5 -19.4 -19.4 -19.4 # 24 210Pb 11.75 11.5 12 -16.7 -16.7 -16.7 # 25 210Pb 12.25 12 12.5 -14.4 -14.4 -14.4 # 26 210Pb 12.75 12.5 13 -11.7 -11.7 -11.7 # 27 210Pb 13.25 13 13.5 -8.8 -8.8 -8.8 # 28 210Pb 13.75 13.5 14 -5.8 -5.8 -5.8 # 29 210Pb 14.25 14 14.5 -3.0 -3.0 -3.0 # 30 210Pb 14.75 14.5 15 0.0 0.0 0.0 # 31 14C 15 13 17 145 0 290 # 32 WRA 55.5 52 59 1147 1014 1256 # 33 14C 92.5 92 93 3580 3470 3690 # 34 14C 128.5 128 129 4800 4730 4870 # 35 14C 189 188 190 7375 7310 7440 # 36 14C 208.5 208 209 8100 8010 8190 # 37 14C 253.5 253 254 10630 10520 10740 # # #---------------- # Variables # # Data variables follow that are preceded by "##" in columns one and two. # 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 ##samp_vol Sample Volume, , , cc, , paleolimnology, , ,N ##spike Spike/Tablet, , , , , , , ,N ##sed_cmyr Sedimentation rate, , , cm/yr, , paleolimnology, , ,N ##pollen/cc pollen, , , grains/cc, , paleolimnology, , ,N ##pollenflux pollen, , , grains/cm2/year, , paleolimnology, , ,N ##char>125cc Macrocharcoal particles >125um, , , particles/cc, , paleolimnology, , ,N ##char>125flux Macrocharcoal particles >125um, , , particles/cm2/year, , paleolimnology, , ,N # #---------------- # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Values: # # depth_cm age_calBP samp_vol spike sed_cmyr pollen/cc pollenflux char>125cc char>125flux 1.5 -56.90345762 2 27000 0.775285408 8682.819383 6731.663171 2735.682819 2120.934972 2.5 -55.61361005 2 27000 0.508044593 12166.66667 6181.209212 27750 14098.23745 3.5 -53.64527889 2 27000 0.358706807 13514.33121 4847.682601 19289.80892 6919.38577 4.5 -50.8574868 2 27000 0.25634123 32067.69231 8220.271678 57821.53846 14822.04427 5.5 -46.95643662 2 27000 0.282511753 14071.57258 3975.384638 15241.93548 4306.025914 6.5 -43.41676088 2 27000 0.204198869 13712.3803 2800.05255 17784.54172 3631.583307 7.5 -38.51957411 2 27000 0.227288698 8797.619048 1999.599383 16750 3807.085699 8.5 -34.11988329 2 27000 0.215392822 14119.89796 3041.324666 6428.571429 1384.66814 9.5 -29.47720304 2 27000 0.179060775 13364.69933 2393.093424 36681.51448 6568.220421 10.5 -23.89250701 2 27000 0.17225152 15596.73025 2686.560492 44141.68937 7603.47309 11.5 -18.087043 2 27000 0.199214229 17980.97252 3582.065572 37588.79493 7488.222791 12.5 -13.06732124 2 27000 0.173654432 37774.03846 6559.62919 101834.1346 17683.9488 13.5 -7.308758157 2 27000 0.047400948 12084.19498 572.8023001 35714.18021 1692.886006 14.5 13.78786624 2 27000 0.07133827 11325.25084 807.9238039 34314.38127 2447.928602 15.5 27.80558769 2 27000 0.062917654 22793.47826 1434.112177 99586.95652 6265.777667 17.5 59.59316836 2 27000 0.056438098 20696.91781 1168.094667 39328.76712 2219.640797 18.5 77.31169614 2 27000 0.052906762 21151.22616 1119.042887 79749.3188 4219.278223 19.5 96.21287179 2 27000 0.049853621 22190.625 1106.283004 102532.5 5111.616374 20.5 116.2715954 2 27000 0.047188959 11214.84375 529.2167971 36984.375 1745.25414 21.5 137.4629933 2 27000 0.044844206 12164.38356 545.5021172 64335.61644 2885.07961 22.5 159.7624184 2 27000 0.042766055 6750 288.6708726 38275.02528 1636.871844 23.5 183.1454495 2 27000 0.040912441 9620.850622 393.6124871 41998.44398 1718.258877 24.5 207.5878921 2 27000 0.039249725 9150.914634 359.1708796 10920.73171 428.6357123 25.5 233.0657778 2 27000 0.037750683 6497.466875 245.2838128 45455.96259 1715.993638 26.5 259.5553647 2 27000 0.036393052 11192.13313 407.3158836 31962.93495 1163.228755 27.5 287.0331371 2 27000 0.035158445 17173.86609 603.8064292 47322.89417 1663.79938 28.5 315.4758056 2 27000 0.034031545 8234.536082 280.2339889 24587.62887 836.7550092 29.5 344.8603071 2 27000 0.032999491 16687.046 550.664021 64688.86199 2134.699506 30.5 375.163805 2 27000 0.032051401 5352.327448 171.5495953 19011.23596 609.3367542 31.5 406.3636889 2 27000 0.030769413 7168.193717 220.5611112 42867.80105 1319.017064 33.5 471.3633044 2 27000 0.029624677 10188.80597 301.8400841 18228.35821 540.0092209 34.5 505.1189469 2 27000 0.028931962 7822.248804 226.313006 29247.84689 846.197598 35.5 539.682797 2 27000 0.02828808 22400.44248 633.6655081 134721.2389 3811.00518 36.5 575.0333758 2 27000 0.027688517 10192.05298 282.2028309 22887.41722 633.7186377 37.5 611.1494309 2 27000 0.027129308 20930.83573 567.8390904 68394.81268 1855.503942 38.5 648.009936 2 27000 0.026606957 9907.385698 263.6053831 42430.83236 1128.955323 39.5 685.5940915 2 27000 0.026118367 15443.18182 403.3506976 87238.63636 2278.530762 40.5 723.8813237 2 27000 0.02566079 7534.569138 193.3429955 28325.6513 726.8585862 41.5 762.8512854 2 27000 0.025231772 8800.521512 222.0527566 79327.90091 2001.583548 42.5 802.4838559 2 27000 0.024829123 9377.798507 232.8425141 53949.62687 1339.52193 43.5 842.7591404 2 27000 0.024450876 12998.96907 317.8361793 106775.2577 2610.748573 44.5 883.6574708 2 27000 0.023456031 6737.142857 158.0266312 35421.42857 830.8461238 49.5 1096.822265 2 27000 0.02191867 8494.212099 186.181836 40056.38536 877.9827114 56.5 1416.184701 2 27000 0.020897743 2320.3125 48.48929506 3741.847826 78.19617543 60.5 1607.592928 2 27000 0.020290108 19550.30488 396.677796 84333.84146 1711.142745 65.5 1854.018428 2 27000 0.019874496 11175.85227 222.1144299 15801.13636 314.0396195 68.5 2004.965653 2 27000 0.019669613 20725.56818 407.6639134 76029.54545 1495.471765 70.5 2106.645334 2 27000 0.019533135 28956.84039 565.6178844 128711.7264 2514.14358 72.5 2209.03545 2 27000 0.019418455 10247.89916 198.9983667 12781.51261 248.1972249 74.5 2312.030256 2 27000 0.019324162 15510.86957 299.734554 62847.82609 1214.481564 76.5 2415.52763 2 27000 0.019265512 11520.12278 221.9410599 30978.1719 596.810332 77.5 2467.433856 2 27000 0.01923254 89146.55172 1714.514632 205758.6207 3957.260926 78.5 2519.429068 2 27000 0.019204012 18299.62312 351.4261908 74317.8392 1427.200712 79.5 2571.501519 2 27000 0.019169801 24613.63636 471.8385204 178772.7273 3427.037674 81.5 2675.832282 2 27000 0.019133291 9599.751656 183.674839 12561.25828 240.3382061 84.5 2832.627056 2 27000 0.019122648 7822.53886 149.5876601 28247.40933 540.1652764 88.5 3041.803103 2 27000 0.019162959 16486.17512 315.9238932 29861.75115 572.2395047 92.5 3250.539137 2 27000 0.019272481 12806.32411 246.8096345 36284.58498 699.2939643 97.5 3509.976418 2 27000 0.019418775 8670.258621 168.3657975 13330.721 258.8662659 100.5 3664.466085 2 27000 0.019586412 9356.358382 183.2574858 34819.07514 681.9807353 104.5 3868.689303 2 27000 0.01981691 17272.51732 342.2879238 57491.91686 1139.312151 108.5 4070.537117 2 27000 0.020124091 15854.30464 319.0534749 67947.01987 1367.372035 113.5 4318.99554 2 27000 0.020434169 7942.5 162.2983861 17392.5 355.4012818 116.5 4465.80846 2 27000 0.020734054 26250 544.268925 103459.4595 2145.134049 120.5 4658.727797 2 27000 0.021008666 14789.55224 310.7087662 19585.07463 411.4562953 122.5 4753.926606 2 27000 0.021200648 19308.98123 409.3629118 59392.76139 1259.16502 124.5 4848.263346 2 27000 0.021348669 21519.23077 459.4069243 60461.53846 1290.773342 125.5 4895.104674 2 27000 0.021449218 21661.9898 464.6327455 22385.20408 480.1451265 126.5 4941.72642 2 27000 0.02155113 28040.03021 604.294334 61422.96073 1323.734206 127.5 4988.1277 2 27000 0.021706392 11891.25 258.1161394 22882.5 496.6965257 129.5 5080.266456 2 27000 0.021864212 11365.80882 248.5044572 26047.05882 569.4984243 130.5 5126.003297 2 27000 0.022024318 23201.00503 510.9863052 48878.1407 1076.507699 132.5 5216.812012 2 27000 0.022349811 5377.853067 120.1940006 38121.61198 852.01083 136.5 5395.784441 2 27000 0.022791079 9472.929936 215.898299 15191.0828 346.2211755 140.5 5571.291705 2 27000 0.023287618 21414.375 498.689777 118023.75 2748.491963 145.5 5785.998082 2 27000 0.023721304 8654.564315 205.2975513 14676.34855 348.1421259 148.5 5912.466677 2 27000 0.024083253 6933.070866 166.9708965 35870.07874 863.8681648 152.5 6078.5572 2 27000 0.024469174 10758.40336 263.2492425 23369.7479 571.8384249 156.5 6242.028186 2 27000 0.024850493 7736.12684 192.2465622 17643.26161 438.4437407 161.5 6443.231442 2 27000 0.025133405 4305.500982 108.211898 15493.61493 389.4072922 164.5 6562.594499 2 27000 0.025319397 9712.230216 245.907815 40869.06475 1034.780086 168.5 6720.576143 2 27000 0.025433048 13366.52542 339.9514799 35332.62712 898.616394 170.5 6799.213985 2 27000 0.025478713 23015.06024 586.3941038 83887.04819 2137.333986 172.5 6877.710887 2 27000 0.025500032 12757.8534 325.3256758 73790.57592 1881.662081 174.5 6956.14216 2 27000 0.02548907 11546.59091 294.3118607 41379.54545 1054.726119 177.5 7073.839668 2 27000 0.025453389 7160.294118 182.2537526 9370.588235 238.5132289 178.5 7113.127167 2 27000 0.025423977 26431.81818 672.0019258 86681.81818 2203.796513 179.5 7152.460117 2 27000 0.025387468 8958.074534 227.4228339 28229.81366 716.6835014 180.5 7191.84963 2 27000 0.025343781 7951.684042 201.5257354 23892.94306 605.5375059 181.5 7231.307042 2 27000 0.025232049 33605.61497 847.938529 134566.8449 3395.397246 184.5 7350.20345 2 27000 0.024967766 10370.75243 258.9345212 21757.28155 543.2307175 188.5 7510.410013 2 27000 0.024495636 15087.61682 369.5807767 50782.71028 1243.954809 193.5 7714.528 2 27000 0.02364023 20816.66667 492.110794 73200 1730.464858 200.5 8010.633406 2 27000 0.022676448 18638.0597 422.6449881 5440.298507 123.3666452 204.5 8187.027876 2 27000 0.021757491 11220.19868 244.123375 50137.74834 1090.871623 209.5 8416.833782 2 27000 0.02087898 15059.65909 314.4303217 24545.45455 512.4840558 212.5 8560.518962 2 27000 0.020062853 18858.41232 378.3535457 42419.43128 851.0547948 216.5 8759.892406 2 27000 0.019101604 9727.941176 185.8192848 4108.031674 78.46999625 220.5 8969.298898 2 27000 0.017996774 29644.58955 533.506975 113843.2836 2048.811833 225.5 9247.126471 2 27000 0.017018811 10267.20506 174.7356228 41959.97191 714.1088332 228.5 9423.402005 2 27000 0.016165735 6817.703109 110.2131795 18686.05817 302.0738584 232.5 9670.83895 2 27000 0.015211979 20551.23967 312.625036 37933.8843 577.0494693 236.5 9933.789607 2 27000 0.014171612 10117.1875 143.3768535 41140.625 583.0289655 241.5 10286.60763 2 27000 0.013508748 4824 65.166201 10116 136.6544961 242.5 10360.63373 2 27000 0.01329099 11329.44515 150.5795452 25757.25095 342.3393717 243.5 10435.87267 2 27000 0.013075764 14338.23529 187.483377 59676.47059 780.3154297 244.5 10512.35004 2 27000 0.012863123 5205.436157 66.95816389 40158.65992 516.5657693 245.5 10590.09166 2 27000 0.012653115 19137.87185 242.1536979 47543.47826 601.5731092 246.5 10669.12358 2 27000 0.012445784 24017.44186 298.9158867 83735.8804 1042.158656 247.5 10749.47207 2 27000 0.012241165 19769.23077 241.9984132 37384.61538 457.6312406 248.5 10831.16365 2 27000 0.01203929 6825.139147 82.16983066 18784.78664 226.1554972 249.5 10914.22502 2 27000 0.022860075 6928.217822 158.3795774 21107.67327 482.522989