[11037] | 1 | Byrd Ice Core CO2 Data for 20-90 KYrBP |
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| 2 | ----------------------------------------------------------------------- |
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| 3 | World Data Center for Paleoclimatology, Boulder |
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| 4 | and |
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| 5 | NOAA Paleoclimatology Program |
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| 6 | ----------------------------------------------------------------------- |
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| 7 | NOTE: PLEASE CITE ORIGINAL REFERENCE WHEN USING THIS DATA!!!!! |
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| 8 | |
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| 9 | |
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| 10 | NAME OF DATA SET: Byrd Ice Core CO2 Data for 20-90 KYrBP |
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| 11 | |
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| 12 | LAST UPDATE: 10/2008 (Original receipt by WDC Paleo) |
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| 13 | CONTRIBUTORS: Jinho Ahn and Edward J. Brook |
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| 14 | IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2008-095 |
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| 15 | |
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| 16 | WDC PALEO CONTRIBUTION SERIES CITATION: |
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| 17 | Ahn, J. and E.J. Brook. 2008. |
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| 18 | Byrd Ice Core CO2 Data for 20-90 KYrBP. |
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| 19 | IGBP PAGES/World Data Center for Paleoclimatology |
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| 20 | Data Contribution Series # 2008-095. |
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| 21 | NOAA/NCDC Paleoclimatology Program, Boulder CO, USA. |
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| 22 | |
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| 23 | |
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| 24 | ORIGINAL REFERENCES: |
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| 25 | References for CO2 data: |
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| 26 | |
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| 27 | Ahn, J. and E.J. Brook. 2008. |
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| 28 | Atmospheric CO2 and Climate on Millennial Time Scales During |
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| 29 | the Last Glacial Period. |
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| 30 | Science, 322, 83-85, doi: 10.1126/science.1160832. |
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| 31 | |
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| 32 | Ahn, J. and Brook, E.J. 2007. |
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| 33 | Atmospheric CO2 and climate from 65 to 30 ka B.P.. |
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| 34 | Geophysical Research Letters, 34, L10703, doi:10.1029/2007GL029551. |
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| 35 | |
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| 36 | |
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| 37 | References for CO2 age: |
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| 38 | |
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| 39 | Blunier-01 age: |
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| 40 | Blunier, T., and Brook, E.J. 2001. |
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| 41 | Timing of millennial-scale climate change in Antarctica and Greenland |
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| 42 | during the last glacial period. |
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| 43 | Science, 291, 109-112. |
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| 44 | |
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| 45 | Ahn-08 age: |
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| 46 | Ahn, J. and E.J. Brook. 2008. |
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| 47 | Atmospheric CO2 and Climate on Millennial Time Scales During |
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| 48 | the Last Glacial Period. |
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| 49 | Science, 322, 83-85, doi: 10.1126/science.1160832. |
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| 50 | |
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| 51 | |
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| 52 | ABSTRACT (Ahn and Brook 2008): |
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| 53 | Reconstructions of ancient atmospheric carbon dioxide (CO2) variations |
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| 54 | help us better understand how the global carbon cycle and climate are |
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| 55 | linked. We compared CO2 variations on millennial time scales between |
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| 56 | 20,000 and 90,000 years ago with an Antarctic temperature proxy and |
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| 57 | records of abrupt climate change in the Northern Hemisphere. CO2 |
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| 58 | concentration and Antarctic temperature were positively correlated |
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| 59 | over millennial-scale climate cycles, implying a strong connection |
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| 60 | to Southern Ocean processes. Evidence from marine sediment proxies |
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| 61 | indicates that CO2 concentration rose most rapidly when North Atlantic |
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| 62 | Deep Water shoaled and stratification in the Southern Ocean was reduced. |
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| 63 | These increases in CO2 concentration occurred during stadial (cold) |
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| 64 | periods in the Northern Hemisphere, several thousand years before |
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| 65 | abrupt warming events in Greenland. |
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| 66 | |
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| 67 | |
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| 68 | |
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| 69 | GEOGRAPHIC REGION: Antarctica |
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| 70 | PERIOD OF RECORD: 90 - 20 KYrBP |
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| 71 | |
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| 72 | FUNDING SOURCES: |
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| 73 | Gary Comer Science and Education Foundation, and |
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| 74 | US National Science Foundation grants OPP 0337891 and ATM 0602395. |
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| 75 | |
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| 76 | |
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| 77 | |
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| 78 | DESCRIPTION: |
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| 79 | Byrd ice core carbon dioxide data for 20-90 KYrBP, analyzed at |
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| 80 | Oregon State University. |
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| 81 | |
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| 82 | Byrd Ice Core location: |
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| 83 | 80.01°S , 119.51°W; 1530 m elev. |
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| 84 | |
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| 85 | |
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| 86 | |
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| 87 | |
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| 88 | DATA: |
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| 89 | Byrd Ice Core CO2 Data for 20-90 KYrBP |
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| 90 | |
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| 91 | Column 1: Depth (m) |
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| 92 | Column 2: Blunier 2001 Age (ka before 1950 AD) |
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| 93 | Column 3: Ahn 2008 Age (ka before 1950 AD) |
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| 94 | Column 4: Mean CO2 (ppm) |
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| 95 | Column 5: Number of replicates |
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| 96 | Column 6: Uncertainty (ppm)* |
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| 97 | Column 7: Reference |
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| 98 | |
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| 99 | *Uncertainty is estimated from the standard deviation of the mean for 2~5 ice samples |
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| 100 | |
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| 101 | Depth Age Bl01 Age Ahn08 Mean CO2 Repl. Uncert. Ref. |
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| 102 | 1315.91 19.460 19.286 194.36 2 0.97 AB-08 |
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| 103 | 1332.34 20.061 19.887 191.14 2 0.19 AB-08 |
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| 104 | 1334.20 20.152 19.978 192.54 2 0.09 AB-08 |
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| 105 | 1346.28 20.578 20.404 204.27 2 0.48 AB-08 |
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| 106 | 1353.02 20.759 20.585 195.37 2 0.02 AB-08 |
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| 107 | 1363.17 21.065 20.891 197.12 2 1.04 AB-08 |
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| 108 | 1381.14 21.731 21.557 195.81 2 1.66 AB-08 |
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| 109 | 1401.95 22.399 22.225 199.75 3 4.49 AB-08 |
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| 110 | 1410.30 22.729 22.555 194.62 2 0.31 AB-08 |
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| 111 | 1420.27 23.530 23.356 195.97 2 1.88 AB-08 |
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| 112 | 1430.78 24.824 24.650 194.74 2 1.94 AB-08 |
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| 113 | 1441.45 26.002 25.828 189.76 2 1.30 AB-08 |
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| 114 | 1460.20 26.711 26.537 192.21 2 1.28 AB-08 |
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| 115 | 1470.77 27.148 26.974 184.40 2 1.42 AB-08 |
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| 116 | 1480.48 27.619 27.445 188.07 2 1.48 AB-08 |
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| 117 | 1490.87 27.989 27.815 201.96 2 0.46 AB-08 |
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| 118 | 1496.52 28.135 27.961 204.98 2 1.71 AB-08 |
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| 119 | 1503.54 28.395 28.221 205.91 3 2.43 AB-08 |
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| 120 | 1512.46 28.660 28.486 207.48 2 1.73 AB-08 |
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| 121 | 1523.46 29.147 28.973 205.54 2 0.40 AB-08 |
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| 122 | 1533.76 29.568 29.396 201.49 2 1.84 AB-08 |
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| 123 | 1543.63 30.013 29.843 197.51 2 3.18 AB-08 |
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| 124 | 1552.76 30.412 30.245 195.36 2 0.89 AB-08 |
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| 125 | 1573.34 31.216 31.053 195.09 3 2.37 AB-08 |
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| 126 | 1581.93 31.738 31.577 202.29 2 0.38 AB-08 |
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| 127 | 1594.06 32.328 32.170 203.67 2 0.40 AB-08 |
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| 128 | 1615.15 33.450 33.297 208.11 2 0.11 AB-08 |
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| 129 | 1620.38 33.692 33.541 205.25 2 0.53 AB-08 |
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| 130 | 1631.11 34.183 34.033 201.53 2 1.67 AB-08 |
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| 131 | 1640.90 34.630 34.484 213.08 2 0.47 AB-08 |
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| 132 | 1650.56 35.097 34.953 206.62 2 1.72 AB-08 |
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| 133 | 1658.96 35.428 35.286 209.93 2 1.10 AB-08 |
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| 134 | 1677.79 36.249 36.111 207.76 2 0.00 AB-08 |
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| 135 | 1688.63 36.840 36.704 212.63 2 0.99 AB-08 |
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| 136 | 1693.68 37.167 37.033 213.98 2 1.37 AB-08 |
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| 137 | 1699.73 37.621 37.488 217.48 2 1.16 AB-08 |
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| 138 | 1708.70 38.122 37.992 216.21 2 1.03 AB-08 |
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| 139 | 1714.20 38.428 38.298 216.52 2 2.21 AB-08 |
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| 140 | 1717.20 38.545 38.415 212.50 2 1.51 AB-08 |
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| 141 | 1719.47 38.655 38.520 211.09 2 1.83 AB-08 |
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| 142 | 1723.22 38.850 38.708 214.78 2 2.64 AB-08 |
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| 143 | 1730.78 39.163 39.006 207.63 2 0.18 AB-08 |
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| 144 | 1740.51 39.539 39.364 214.06 2 0.14 AB-08 |
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| 145 | 1743.27 39.651 39.470 213.84 2 1.23 AB-08 |
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| 146 | 1747.69 39.811 39.621 203.03 2 1.03 AB-08 |
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| 147 | 1755.15 40.038 39.834 202.11 2 0.45 AB-08 |
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| 148 | 1760.29 40.172 39.958 203.78 2 2.59 AB-08 |
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| 149 | 1770.24 40.544 40.311 203.40 2 1.56 AB-08 |
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| 150 | 1779.99 40.966 40.714 201.30 2 1.46 AB-08 |
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| 151 | 1790.29 41.585 41.313 202.69 2 2.43 AB-08 |
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| 152 | 1802.03 42.320 42.025 204.64 2 0.56 AB-08 |
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| 153 | 1811.74 42.851 42.537 207.18 2 1.53 AB-08 |
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| 154 | 1821.19 43.591 43.259 210.31 2 0.60 AB-08 |
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| 155 | 1830.63 44.137 43.786 214.57 2 0.51 AB-08 |
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| 156 | 1840.93 44.598 44.228 216.83 3 2.50 AB-08 |
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| 157 | 1844.41 44.760 44.383 215.54 2 1.26 AB-08 |
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| 158 | 1847.46 44.899 44.516 219.62 2 0.94 AB-08 |
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| 159 | 1855.09 45.229 44.831 221.00 2 0.60 AB-08 |
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| 160 | 1859.57 45.526 45.120 217.56 2 0.82 AB-08 |
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| 161 | 1861.17 45.633 45.223 219.39 2 0.53 AB-08 |
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| 162 | 1862.59 45.725 45.313 218.62 2 2.56 AB-08 |
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| 163 | 1864.56 45.852 45.436 217.23 2 2.04 AB-08 |
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| 164 | 1867.90 46.075 45.654 211.58 2 0.64 AB-08 |
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| 165 | 1871.26 46.298 45.872 206.99 2 0.29 AB-08 |
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| 166 | 1873.26 46.431 46.002 209.25 2 1.24 AB-08 |
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| 167 | 1880.36 46.889 46.448 205.61 2 1.63 AB-08 |
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| 168 | 1884.88 47.187 46.740 204.28 2 1.02 AB-08 |
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| 169 | 1892.21 47.687 47.228 205.36 2 1.00 AB-08 |
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| 170 | 1894.8 47.865 47.402 205.51 2 1.63 AB-07 |
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| 171 | 1903.72 48.450 47.973 201.79 2 2.79 AB-07 |
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| 172 | 1909.75 48.874 48.388 211.47 4 1.09 AB-07 |
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| 173 | 1911.29 48.984 48.495 207.15 4 1.93 AB-07 |
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| 174 | 1914.31 49.191 48.697 212.35 2 0.57 AB-07 |
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| 175 | 1920.25 49.596 49.092 213.91 4 2.43 AB-07 |
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| 176 | 1929.4 50.230 49.712 216.76 2 0.28 AB-07 |
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| 177 | 1938.5 50.857 50.325 215.07 2 0.30 AB-07 |
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| 178 | 1943.09 51.175 50.636 218.12 5 2.35 AB-07 |
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| 179 | 1945.98 51.394 50.850 221.08 3 0.35 AB-07 |
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| 180 | 1953.17 51.894 51.339 216.69 4 2.96 AB-07 |
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| 181 | 1956.34 52.193 51.633 217.93 2 2.81 AB-07 |
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| 182 | 1959.23 52.505 51.941 218.83 2 1.55 AB-07 |
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| 183 | 1962.18 52.812 52.259 219.08 4 2.10 AB-07 |
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| 184 | 1963.62 52.963 52.423 215.70 2 1.94 AB-07 |
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| 185 | 1968.07 53.422 52.923 212.28 2 2.52 AB-07 |
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| 186 | 1972.66 53.926 53.470 213.25 2 0.74 AB-07 |
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| 187 | 1978.74 54.577 54.177 205.57 2 0.58 AB-07 |
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| 188 | 1981.61 54.859 54.486 212.48 4 2.46 AB-07 |
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| 189 | 1988.98 55.644 55.339 215.94 2 0.96 AB-07 |
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| 190 | 1995.01 56.317 56.068 215.25 2 0.38 AB-07 |
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| 191 | 2001.46 57.022 56.833 218.27 2 3.65 AB-07 |
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| 192 | 2003.23 57.222 57.049 223.09 2 0.30 AB-07 |
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| 193 | 2013.21 58.096 58.016 222.69 3 2.59 AB-07 |
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| 194 | 2017.71 58.467 58.421 224.99 2 0.97 AB-07 |
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| 195 | 2022.42 59.125 59.072 220.11 2 1.49 AB-07 |
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| 196 | 2026.9 59.806 59.746 224.21 3 1.18 AB-07 |
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| 197 | 2028.47 60.039 59.976 217.96 2 1.39 AB-07 |
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| 198 | 2031.5 60.526 60.459 218.85 2 3.26 AB-07 |
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| 199 | 2037.68 61.451 61.374 210.28 2 1.65 AB-07 |
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| 200 | 2042.43 62.186 62.102 212.26 2 0.85 AB-07 |
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| 201 | 2048.32 63.079 62.986 204.65 2 0.39 AB-07 |
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| 202 | 2051.4 63.526 63.429 206.76 2 2.20 AB-07 |
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| 203 | 2055.9 64.152 64.048 204.06 2 0.84 AB-07 |
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| 204 | 2066.85 65.565 65.444 208.22 2 2.01 AB-08 |
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| 205 | 2069.64 65.938 65.813 207.08 2 2.09 AB-08 |
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| 206 | 2072.65 66.333 66.204 217.67 2 2.07 AB-08 |
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| 207 | 2075.59 66.779 66.644 211.79 2 0.25 AB-08 |
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| 208 | 2075.745 66.818 66.6833 219.64 3 1.17 AB-08 |
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| 209 | 2076.02 66.890 66.755 222.40 2 0.47 AB-08 |
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| 210 | 2076.43 66.997 66.861 223.63 2 0.27 AB-08 |
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| 211 | 2077.02 67.151 67.014 220.43 2 3.79 AB-08 |
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| 212 | 2080.12 67.959 67.818 244.03 2 5.52 AB-08 |
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| 213 | 2080.61 68.086 67.944 240.28 2 0.28 AB-08 |
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| 214 | 2081.10 68.213 68.071 246.47 2 0.93 AB-08 |
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| 215 | 2081.59 68.340 68.197 247.22 2 2.42 AB-08 |
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| 216 | 2082.54 68.582 68.435 249.96 3 3.97 AB-08 |
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| 217 | 2082.64 68.608 68.460 248.32 2 2.08 AB-08 |
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| 218 | 2083.085 68.721 68.5708 238.70 4 4.19 AB-08 |
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| 219 | 2083.54 68.837 68.685 238.61 2 0.33 AB-08 |
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| 220 | 2083.82 68.908 68.755 238.78 2 1.42 AB-08 |
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| 221 | 2084.14 68.989 68.834 238.84 2 0.02 AB-08 |
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| 222 | 2084.52 69.086 68.929 231.99 3 4.59 AB-08 |
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| 223 | 2085.44 69.314 69.149 237.98 2 0.97 AB-08 |
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| 224 | 2087.02 69.706 69.527 237.26 3 0.40 AB-08 |
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| 225 | 2087.75 69.886 69.700 233.74 2 0.93 AB-08 |
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| 226 | 2089.24 70.246 70.048 234.85 2 0.19 AB-08 |
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| 227 | 2090.16 70.469 70.262 234.35 2 3.03 AB-08 |
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| 228 | 2093.50 71.337 71.101 237.17 2 0.49 AB-08 |
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| 229 | 2093.71 71.395 71.158 236.62 3 1.43 AB-08 |
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| 230 | 2095.46 71.875 71.622 240.58 2 3.79 AB-08 |
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| 231 | 2097.91 72.515 72.240 246.81 3 2.23 AB-08 |
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| 232 | 2099.29 72.885 72.598 244.19 1 AB-08 |
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| 233 | 2100.05 73.073 72.783 246.30 2 0.85 AB-08 |
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| 234 | 2100.69 73.230 72.937 236.93 2 0.88 AB-08 |
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| 235 | 2101.27 73.369 73.079 242.80 2 3.41 AB-08 |
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| 236 | 2101.80 73.492 73.209 241.26 2 0.14 AB-08 |
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| 237 | 2101.97 73.531 73.251 237.79 4 2.31 AB-08 |
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| 238 | 2103.15 73.805 73.542 240.63 3 0.85 AB-08 |
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| 239 | 2103.60 73.909 73.653 235.11 2 0.58 AB-08 |
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| 240 | 2104.68 74.184 73.944 231.11 2 0.89 AB-08 |
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| 241 | 2105.52 74.410 74.182 228.82 2 2.08 AB-08 |
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| 242 | 2106.32 74.656 74.440 223.79 2 1.22 AB-08 |
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| 243 | 2107.63 75.055 74.858 230.49 2 0.28 AB-08 |
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| 244 | 2109.17 75.518 75.343 228.85 2 0.25 AB-08 |
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| 245 | 2110.06 75.783 75.621 226.25 1 AB-08 |
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| 246 | 2111.20 76.120 75.975 229.45 2 2.14 AB-08 |
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| 247 | 2113.37 76.765 76.651 229.56 2 1.56 AB-08 |
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| 248 | 2116.08 77.586 77.513 232.82 3 1.97 AB-08 |
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| 249 | 2116.73 77.785 77.721 240.83 3 1.24 AB-08 |
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| 250 | 2120.16 78.809 78.795 235.51 2 0.11 AB-08 |
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| 251 | 2122.78 79.604 79.628 238.65 2 4.76 AB-08 |
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| 252 | 2125.62 80.449 80.515 240.08 3 1.03 AB-08 |
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| 253 | 2126.13 80.635 80.708 233.00 3 1.69 AB-08 |
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| 254 | 2130.20 82.116 82.248 250.22 2 4.72 AB-08 |
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| 255 | 2130.67 82.399 82.539 246.47 2 0.04 AB-08 |
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| 256 | 2130.78 82.466 82.607 244.08 2 2.06 AB-08 |
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| 257 | 2131.99 83.195 83.354 250.70 2 0.33 AB-08 |
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| 258 | 2132.50 83.503 83.669 248.75 2 2.37 AB-08 |
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| 259 | 2132.66 83.600 83.766 237.44 2 2.38 AB-08 |
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| 260 | 2134.46 84.687 84.855 240.19 2 1.00 AB-08 |
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| 261 | 2134.70 84.828 84.996 240.36 2 1.19 AB-08 |
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| 262 | 2135.22 85.133 85.301 233.84 2 0.20 AB-08 |
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| 263 | 2135.97 85.572 85.740 241.73 2 1.76 AB-08 |
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| 264 | 2136.25 85.734 85.902 220.23 2 5.01 AB-08 |
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| 265 | 2136.93 86.127 86.295 225.72 2 1.15 AB-08 |
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| 266 | 2137.57 86.498 86.666 228.99 3 1.73 AB-08 |
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| 267 | 2138.02 86.764 86.932 229.26 2 1.58 AB-08 |
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| 268 | 2138.32 86.942 87.110 218.37 2 0.94 AB-08 |
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| 269 | 2138.79 87.221 87.389 222.25 2 1.43 AB-08 |
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| 270 | 2143.57 90.075 90.266 236.19 5 2.31 AB-08 |
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| 271 | 2144.02 90.342 90.534 235.65 2 2.86 AB-08 |
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| 272 | 2144.72 90.759 90.953 242.07 3 4.54 AB-08 |
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| 273 | |
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