%2MBIA09 Surface Transect through the Allan Hills Main Icefield %Water isotope data from the University of Maine Climate Change Institute %Andrei V. Kurbatov, Nicole E. Spaulding, Paul A. Mayewski, and Douglas Introne % %Primary Citations: % %Spaulding, N.E., Kurbatov, A.V., Higgins, J.A., Bender, M.L., Arcone, S.A., Campbell, S., Dunbar, N.W., Introne, D.S., and Mayewski, P.A. (Accepted, 2013). Climate archives from %90-250 ka in horizontal and vertical ice cores from the Allan Hills Blue Ice Area, Antarctica. Quaternary Research. % %Spaulding, N. E., V. B. Spikes, G. S. Hamilton, P. A. Mayewski, N. W. Dunbar, R. P. Harvey, J. Schutt, and A. V. Kurbatov. 2012. Updates on ice motion and mass %balance at the Allan Hills Icefield, Antarctica, with implications for paleoclimate reconstructions. Journal of Glaciology 58(208), pp 399-406. % %Surface ice samples (~50 grams each) were collected from 5-10 cm below the ice surface at 10 m interval between the flagged waypoints (listed as Site Numbers - %coordinates provided) of a transect (A-B) through the main icefield. Ice samples were processed at McMurdo Station's Crary Laboratory using the following %procedure: Each sample was melted in a sealed plastic bag at room temperature, vigorously shaken, then decanted into an 18 ml plastic scintillation vial. As an %extra precaution against evaporation during shipment, the scintillation vials were sealed with both paraffin wax and electric tape. The sealed samples were refrozen %and shipped to the University of Maine where they remained frozen (below -10C) until the time of analysis. All samples analyzed between February and April of 2010 %at the University of Maine Climate Change Institute for d18O via equilibration with CO2 gas at 25C. Equilibrated gas was admitted from a Micromass Multiprep %peripheral to a VG SIRA dual inlet mass spectrometer for measurement (±0.5 per mil precision). Isotope ratios are normalized on the V-SMOW / SLAP scale. % %*Distances are in km from Site 1 %Age is from 2013 version of the time-scale established in Spaulding et al., 2013. Age Distance d18O Site Latitude Longitude (ka) (km) (per mil) 86.7 5.196 -39.6 18 -76.71202778 159.2231944 86.849 5.186 -41.4 86.997 5.176 -39.7 87.145 5.166 -40.4 87.294 5.156 -39.9 87.442 5.146 -40 87.59 5.136 -40.4 87.887 5.116 -42.3 88.036 5.106 -42.9 88.184 5.096 -40.7 88.332 5.086 -41.1 88.481 5.076 -41.5 88.629 5.066 -39.4 88.926 5.046 -40.5 89.074 5.036 -40.9 89.222 5.026 -39.8 89.371 5.016 -41.2 89.519 5.006 -40.3 89.668 4.996 -38.4 89.741 4.986 -40.2 89.815 4.976 -40.7 89.889 4.966 -39.9 89.962 4.956 -39.2 90.036 4.946 -41 90.11 4.936 -41.3 90.183 4.926 -40.3 90.257 4.916 -41.1 90.331 4.906 -41.8 90.404 4.896 -41.7 90.478 4.886 -41.5 17 -76.7115 159.235 90.552 4.876 -41.7 90.625 4.866 -42.8 90.699 4.856 -41.5 90.773 4.846 -42.4 90.847 4.836 -41 90.92 4.826 -40.3 90.994 4.816 -42.1 91.068 4.806 -42.1 91.141 4.796 -41.5 91.215 4.786 -42.6 91.289 4.776 -41.1 91.362 4.766 -41.7 91.436 4.756 -40.7 91.51 4.746 -40.8 91.583 4.736 -42 91.657 4.726 -41.9 91.731 4.716 -40.4 91.804 4.706 -40.3 91.878 4.696 -41.9 91.952 4.686 -40.4 92.026 4.676 -41.1 92.099 4.666 -41.7 92.173 4.656 -40.5 92.247 4.646 -40 92.32 4.636 -41.7 92.394 4.626 -40.9 92.468 4.616 -40.1 92.541 4.606 -41 92.615 4.596 -40.2 92.689 4.586 -40.3 92.762 4.576 -39.2 92.836 4.566 -40.7 92.91 4.556 -40 92.983 4.546 -39.1 16 -76.71066667 159.2468056 93.057 4.536 -40.4 93.131 4.526 -39.2 93.205 4.516 -41.8 93.278 4.506 -38.7 93.37 4.496 -42.3 93.463 4.486 -40 93.555 4.476 -39.4 93.647 4.466 -41.6 93.739 4.456 -39.3 93.831 4.446 -40.6 93.924 4.436 -40.2 94.016 4.426 -41 94.108 4.416 -38.9 94.2 4.406 -38.4 94.292 4.396 -38.3 94.385 4.386 -38.5 94.477 4.376 -38.7 94.569 4.366 -40.7 94.661 4.356 -39 94.753 4.346 -38.7 94.846 4.336 -38.8 94.938 4.326 -40.1 95.03 4.316 -39.4 95.122 4.306 -39.6 95.214 4.296 -38.2 95.307 4.286 -39.1 95.399 4.276 -37.3 95.491 4.266 -39.8 95.583 4.256 -38.2 95.675 4.246 -38.7 95.768 4.236 -40.3 95.86 4.226 -38 95.952 4.216 -38.8 96.044 4.206 -41.1 96.136 4.196 -39 96.229 4.186 -39.8 96.321 4.176 -38.6 96.413 4.166 -40.2 15 -76.71019444 159.261 96.505 4.156 -40.1 96.597 4.146 -40.6 96.689 4.136 -43.3 96.782 4.126 -41.8 96.874 4.116 -39 96.966 4.106 -39.6 97.058 4.096 -40.6 97.15 4.086 -40.7 97.243 4.076 -39 97.335 4.066 -41 97.427 4.056 -38.5 97.519 4.046 -39.5 97.611 4.036 -40.8 97.704 4.026 -40.7 97.796 4.016 -40 97.888 4.006 -38.9 97.98 3.996 -42.5 98.072 3.986 -38.7 98.165 3.976 -39.5 98.257 3.966 -39.1 98.349 3.956 -38.1 98.533 3.936 -38.2 98.717 3.926 -39.9 98.901 3.916 -38.5 99.084 3.906 -41.3 99.268 3.896 -39 99.452 3.886 -39.4 99.635 3.876 -40.4 99.819 3.866 -38.4 100.003 3.856 -39.3 100.186 3.846 -39.3 100.37 3.836 -38.9 100.554 3.826 -39.6 100.737 3.816 -38.4 100.921 3.806 -39.3 101.105 3.796 -38.5 101.288 3.786 -38.2 101.472 3.776 -40.6 101.656 3.766 -40.2 101.839 3.756 -35.6 14 -76.70872222 159.2751667 102.023 3.746 -38.6 102.207 3.736 -39.9 102.39 3.726 -40 102.574 3.716 -41 102.758 3.706 -41.4 102.941 3.696 -39.8 103.125 3.686 -39.3 103.309 3.676 -38.8 103.492 3.666 -42.3 103.561 3.656 -40.9 103.629 3.646 -41.5 103.698 3.636 -40.9 103.766 3.626 -41.3 103.835 3.616 -41.4 103.903 3.606 -41 103.972 3.596 -40.7 104.04 3.586 -40.8 104.109 3.576 -40 104.177 3.566 -39.5 104.246 3.556 -40.6 104.314 3.546 -40.7 104.382 3.536 -39.6 104.451 3.526 -40.5 104.519 3.516 -41.9 104.588 3.506 -39.3 104.656 3.496 -39.3 104.725 3.486 -40.1 104.793 3.476 -42.1 104.862 3.466 -40.1 104.93 3.456 -40 104.999 3.446 -39.9 105.067 3.436 -38.2 105.136 3.426 -41.9 105.204 3.416 -40.5 105.273 3.406 -40.3 105.341 3.396 -42.9 105.41 3.386 -39 105.478 3.376 -38.1 105.547 3.366 -41.8 105.615 3.356 -43 105.683 3.346 -38.8 105.752 3.336 -41.8 105.82 3.326 -41 105.889 3.316 -40.3 105.957 3.306 -42.2 106.094 3.286 -41 13 -76.70627701 159.2896032 106.135 3.28 -40.9 106.204 3.27 -41 106.272 3.26 -41.2 106.341 3.25 -39.4 106.409 3.24 -40.4 106.478 3.23 -40 106.546 3.22 -40.2 106.615 3.21 -40.7 106.683 3.20 -42.6 106.752 3.19 -40.9 106.82 3.18 -40.6 106.889 3.17 -42 106.957 3.16 -39.4 107.026 3.15 -39 107.094 3.14 -38.9 107.162 3.13 -41.2 107.231 3.12 -41.9 107.299 3.11 -40.8 107.368 3.10 -40.4 107.436 3.09 -42.1 107.505 3.08 -41.3 107.573 3.07 -40.9 107.642 3.06 -42.4 107.71 3.05 -41.9 107.779 3.04 -41.6 107.847 3.03 -40.9 107.916 3.02 -40.3 107.984 3.01 -41.7 108.053 3.00 -41.2 12 -76.70483333 159.2984444 108.121 2.99 -40.7 108.19 2.98 -41.5 108.258 2.97 -42.8 108.327 2.96 -41.8 108.395 2.95 -43.7 108.597 2.94 -41.6 108.799 2.93 -41.5 109.001 2.92 -41.6 109.203 2.91 -40.7 109.405 2.90 -41.4 109.607 2.89 -40.1 109.809 2.88 -38.7 110.01 2.87 -42.5 110.212 2.86 -40.3 110.414 2.85 -41.7 110.616 2.84 -42.3 110.818 2.83 -41.1 111.02 2.82 -39.4 111.222 2.81 -41.7 111.424 2.80 -41 111.626 2.79 -38.8 111.828 2.78 -38.5 112.03 2.77 -38.7 112.232 2.76 -40.7 112.434 2.75 -38.2 112.636 2.74 -40 112.838 2.73 -39 113.04 2.72 -39.5 113.241 2.71 -39.5 113.443 2.70 -41.1 113.645 2.69 -39 113.847 2.68 -39.7 114.049 2.67 -41.6 11 -76.7033014 159.3064608 114.365 2.66 -40.9 114.622 2.65 -40.7 114.858 2.64 -42.1 115.079 2.63 -43.2 115.301 2.62 -40.3 115.523 2.61 -38.6 115.744 2.60 -40.4 115.966 2.59 -38 116.194 2.58 -39.6 116.483 2.57 -40.2 116.773 2.56 -39.5 117.063 2.55 -37.2 117.353 2.54 -38.6 117.643 2.53 -39.1 117.932 2.52 -37.7 118.222 2.51 -36.2 118.512 2.50 -36.4 119.008 2.49 -37.7 119.503 2.48 -37.2 119.999 2.47 -36.4 120.495 2.46 -37 120.991 2.45 -37.8 121.486 2.44 -40.3 122.01 2.43 -37.1 122.674 2.42 -38.1 123.246 2.41 -37.1 123.818 2.40 -37.2 124.332 2.39 -36.4 124.74 2.38 -35.7 125.148 2.37 -37.4 125.556 2.36 -36.7 125.963 2.35 -37.1 126.371 2.34 -38.6 126.645 2.33 -39 126.852 2.32 -38.2 10 -76.70055556 159.3166667 127.058 2.31 -39.2 127.167 2.30 -36.8 127.277 2.29 -38.3 127.386 2.28 -37.8 127.496 2.27 -37.7 127.605 2.26 -38.2 127.715 2.25 -37.8 127.824 2.24 -37.4 127.934 2.23 -39.1 128.043 2.22 -35.8 128.153 2.21 -39.4 128.229 2.20 -37.3 128.274 2.19 -38.1 128.303 2.18 -37.9 128.331 2.17 -38.1 128.359 2.16 -35.1 128.387 2.15 -35.7 128.415 2.14 -36.3 128.613 2.07 -36.1 128.652 2.06 -35 128.799 2.05 -36.9 128.946 2.04 -36.2 129.164 2.03 -34.2 129.394 2.02 -34.6 129.623 2.01 -37.1 129.853 2.00 -39.1 130.082 1.99 -34.1 130.312 1.98 -37.8 9 -76.69833333 159.3257778 130.542 1.97 -36.5 130.771 1.96 -36.8 131.001 1.95 -37.8 131.231 1.94 -37.4 131.46 1.93 -36.8 131.69 1.92 -39.6 131.919 1.91 -37.9 132.149 1.90 -38 132.379 1.89 -38.8 132.608 1.88 -38.5 132.78 1.87 -39.1 132.951 1.86 -39 133.122 1.85 -37.7 133.293 1.84 -38 133.661 1.83 -39.1 134.029 1.82 -38.9 134.397 1.81 -38.2 134.764 1.80 -40 135.132 1.79 -38.9 135.5 1.78 -41.9 135.868 1.77 -40.4 136.473 1.76 -42 137.831 1.75 -40.7 139.188 1.74 -40.8 8 -76.6965 159.3308056 140.546 1.73 -39.5 141.903 1.72 -41.9 143.261 1.71 -39.4 144.619 1.70 -40.7 145.976 1.69 -41.6 147.334 1.68 -41.6 148.691 1.67 -41.3 150.049 1.66 -41.4 151.407 1.65 -42.1 152.764 1.64 -40.6 154.122 1.63 -41.3 155.48 1.62 -41.6 157.077 1.61 -42.6 158.559 1.60 -40 159.99 1.59 -40.1 161.105 1.58 -38.4 161.899 1.57 -41.1 162.58 1.56 -43.5 163.009 1.55 -40 163.438 1.54 -40.7 163.867 1.53 -41.4 164.741 1.52 -43.2 167.113 1.51 -41.9 169.485 1.50 -40.6 171.856 1.49 -42.2 7 -76.69441779 159.3363545 174.228 1.48 -42.4 176.31 1.47 -42.2 177.775 1.46 -41.2 179.235 1.45 -42.8 180.587 1.44 -41.7 181.938 1.43 -42.7 183.29 1.42 -43.1 184.642 1.41 -41 185.993 1.40 -41.3 187.345 1.39 -38.6 188.811 1.38 -39.8 189.858 1.37 -39.2 190.96 1.36 -38.1 192.07 1.35 -41.6 192.609 1.34 -41.8 193.147 1.33 -40.9 193.615 1.32 -40.3 194.064 1.31 -42.2 194.512 1.30 -40.6 194.961 1.29 -42.4 195.409 1.28 -43.5 195.858 1.27 -37.8 196.306 1.26 -38.4 196.755 1.25 -42 197.204 1.24 -38.1 197.652 1.23 -36.5 198.101 1.22 -35.9 199.11 1.21 -38.2 200.119 1.20 -39.9 201.128 1.19 -37.9 6 -76.6921805 159.3411933 203.32 1.18 -39.6 206.206 1.17 -39.9 209.091 1.16 -39.7 211.976 1.15 -38.4 214.862 1.14 -36.4 218.708 1.13 -39.4 224.882 1.12 -38.8 228.624 1.11 -38.9 232.365 1.10 -39.6 233.758 1.09 -39.7 235.151 1.08 -40.1 236.544 1.07 -36 237.937 1.06 -37.9 239.33 1.05 -37.7 240.723 1.04 -37.7 242.117 1.03 -37.4 243.51 1.02 -37.9 244.834 1.01 -37.6 244.945 1.00 -37 245.087 0.99 -35.6 245.23 0.98 -38.5 245.62 0.97 -37.6 246.586 0.96 -36.4 247.551 0.95 -38.5 248.516 0.94 -40 249.126 0.93 -40.7 250.057 0.92 -40.6 250.989 0.91 -41 251.92 0.90 -39.7 253.443 0.88 -38.2 253.972 0.87 -38.9 254.5 0.86 -38.9 5 -76.68927778 159.3458333 NA 0.85 -38.5 NA 0.84 -37.8 NA 0.83 -37.9 NA 0.82 -38.7 NA 0.81 -37.9 NA 0.80 -36.8 NA 0.79 -37.9 NA 0.78 -37.9 NA 0.77 -38.7 NA 0.76 -38.4 NA 0.75 -39.6 NA 0.74 -40.8 NA 0.73 -40.1 NA 0.72 -40.7 4 -76.68840465 159.3482845 NA 0.71 -40.5 NA 0.70 -36.6 NA 0.69 -35.8 NA 0.68 -39.9 NA 0.67 -38.4 NA 0.66 -35.9 NA 0.65 -35.1 NA 0.64 -38.2 NA 0.63 -36.1 NA 0.62 -39.5 NA 0.61 -38.3 NA 0.60 -38.5 NA 0.59 -39.8 NA 0.58 -39.9 NA 0.57 -37.8 NA 0.56 -37.2 NA 0.51 -37 3 -76.68673054 159.3500054 NA 0.50 -37.6 NA 0.49 -37.4 NA 0.48 -37 NA 0.47 -39.8 NA 0.46 -40.5 NA 0.45 -38.4 NA 0.44 -40.9 NA 0.43 -40.7 NA 0.42 -40 NA 0.41 -38 NA 0.40 -38.5 NA 0.39 -38.1 NA 0.38 -39.1 NA 0.37 -36.8 NA 0.35 -37 NA 0.34 -37 NA 0.33 -39.5 NA 0.32 -35.6 NA 0.31 -37.8 NA 0.30 -38.5 2 -76.68478123 159.3513855 NA 0.29 -37.1 NA 0.28 -40.3 NA 0.27 -38.5 NA 0.26 -38.2 NA 0.25 -37.8 NA 0.24 -37.7 NA 0.23 -38.3 NA 0.22 -38.6 NA 0.21 -37.4 NA 0.20 -40.3 NA 0.19 -37.7 NA 0.18 -38.4 NA 0.17 -38.7 NA 0.15 -38 NA 0.14 -38.3 NA 0.13 -38.6 NA 0.12 -40.9 NA 0.11 -35.7 NA 0.10 -35 NA 0.09 -37.1 NA 0.08 -38.6 NA 0.07 -36 NA 0.05 -35.5 NA 0.04 -36.3 NA 0.01 -36.8 NA 0.00 -39.6 1 -76.68199593 159.3533872