Southwest Pacific MD06-3018 Pleistocene Benthic Stable Isotope Data ----------------------------------------------------------------------- World Data Center for Paleoclimatology, Boulder and NOAA Paleoclimatology Program ----------------------------------------------------------------------- NOTE: PLEASE CITE ORIGINAL REFERENCE WHEN USING THIS DATA!!!!! NAME OF DATA SET: Southwest Pacific MD06-3018 Pleistocene Benthic Stable Isotope Data LAST UPDATE: 11/2009 (Original receipt by WDC Paleo) CONTRIBUTOR: Tom Russon, University of Edinburgh IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2009-136 WDC PALEO CONTRIBUTION SERIES CITATION: Russon, T., et al. 2009. Southwest Pacific MD06-3018 Pleistocene Benthic Stable Isotope Data. IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series # 2009-136. NOAA/NCDC Paleoclimatology Program, Boulder CO, USA. ORIGINAL REFERENCE: Russon, T., M. Elliot, C. Kissel, G. Cabioch, P. De Deckker, and T. Corrège. 2009. Middle-late Pleistocene deep water circulation in the southwest subtropical Pacific. Paleoceanography, 24, PA4205, doi:10.1029/2009PA001755 ABSTRACT: The modern d13CDIC distribution in southwest subtropical Pacific deep waters is consistent with a regional mixing regime between water masses of open Pacific Ocean and Tasman Sea origin. This mixing regime is reconstructed across the middle-late Pleistocene using a record of benthic foraminiferal d13C in a sediment core from the New Caledonia Trough. The relative influence on the mixing regime from open Pacific Ocean deep waters is seen to be significantly reduced during glacial in comparison to interglacial stages over the past 1.1 Ma. The spatial d13C gradient in the Southern Ocean between deep waters entering the Tasman Sea and the open Pacific Ocean is shown to be consequently greater during glacial than interglacial stages but was generally reduced across the period of the Middle Pleistocene Transition. The existence of strong spatial chemical gradients in the glacial Southern Ocean limits its capacity to act as an enhanced sink for atmospheric carbon. GEOGRAPHIC REGION: Subtropical western Pacific PERIOD OF RECORD: 1.5 MYrBP - present FUNDING SOURCE: NERC Ph.D. studentship 14325 to T. Russon. DESCRIPTION: Carbon and oxygen isotope measurements of the benthic foraminifer Cibicides wuellerstorfi from core MD06-3018 at 2470 m depth in the New Caledonia Trough. These data are used to reconstruct the deep water mixing regime in the southwest Pacific over the middle to late Pleistocene. Specimens picked from >315 um size fraction. All values in relation to VPDB, d18O corrected by +0.64 permil. Measurements made on Thermo Electron Delta+ Mass Spectrometer with Kiel Preparation Device in the School of GeoSciences, University of Edinburgh. Samples are 1cm thick and composite depth refers to depth of sample top in relation to core top. Age model is created from tuning of d18O record to LR04 stack with additional tie-points based on magnetic stratigraphy and biostratigraphy. Core MD06-3018, New Caledonia Basin, subtropical western Pacific: 23º00'S, 166º09'E, 2470 m water depth. DATA: MD06-3018 Cibicides wuellerstorfi stable isotope data Specimens picked from >315 um size fraction. All values per mil in relation to VPDB, d18O corrected by +0.64 permil. Depth Age(ka) d18O d13C 0 0 3.3849 0.5387 10 2.9 3.228 0.739 20 5.8 3.1428 0.9423 30 8.7 4.0213 0.804 40 11.6 3.7253 -0.0209 50 14.5 4.5199 -0.0224 60 17.4 4.5944 0.0436 70 20.2 4.7456 0.1295 80 25.2 4.871 0.132 90 30.3 4.6518 0.3726 100 35.5 4.587 0.361 110 40.6 4.349 0.2985 120 45.8 4.5856 0.479 130 50.9 4.4798 0.6037 140 56.1 4.1174 0.5657 150 61.2 4.5639 0.3661 160 66.3 4.6369 0.1932 170 71 4.5511 0.3151 180 75.8 4.1513 0.5849 190 80.6 4.1856 0.3201 200 85.3 4.159 0.409 210 90.1 3.8895 0.5328 220 94.9 4.0556 0.5191 230 99.6 3.8836 0.4374 240 104.4 4.0085 0.2598 250 109.4 4.1914 0.3692 260 115 3.5915 0.448 265 117.7 3.8564 0.4466 275 123.3 3.7753 0.4877 280 126.1 3.5705 0.4465 290 131.6 4.2539 0.1705 300 134 4.605 0.024 310 136.4 4.7763 0.1043 320 138.9 4.8489 -0.1877 330 142.2 4.9708 -0.0444 340 147.7 4.6638 -0.222 350 153.2 4.6412 0.0501 360 158.7 4.9079 -0.1085 370 164.2 4.5811 0.0489 380 169.7 4.1823 -0.2612 390 175.2 4.6214 -0.0507 400 180.7 4.239 -0.071 410 186.2 4.6782 0.0691 420 190.2 4.0919 -0.1149 430 193.9 4.3346 0.1887 440 197.6 3.9567 0.4184 450 201.4 3.8626 0.3896 460 205.1 3.8285 0.4206 470 208.8 3.9497 0.4176 480 212.5 3.7191 0.5664 490 215.8 3.6734 0.3971 500 218.7 4.172 0.08 510 221.6 4.2539 0.158 520 231.1 4.2899 0.1632 530 240.5 4.0657 0.1687 540 246.9 4.5192 0.1586 550 253.3 4.4322 0.09 560 259.7 4.4395 -0.0555 570 266.1 4.5847 -0.0583 580 271.9 4.6917 -0.0405 590 274.2 4.5896 -0.0125 600 276.4 4.222 -0.0083 610 278.7 4.3878 0.5608 620 281 4.2771 0.3788 630 283.3 4.014 0.7519 640 286 3.7763 0.493 650 290.8 4.478 0.165 660 295.6 4.2974 0.2339 670 300.4 4.3895 0.2254 680 305.1 4.2745 0.2998 690 309.9 3.9549 0.4141 700 314.7 3.651 0.219 710 319.5 3.7369 0.2944 720 324.3 3.7076 0.4503 730 329.1 3.6171 0.33 740 330.5 3.8312 0.3868 855 342 4.0641 0.3662 865 343 4.2872 0.2284 875 344.6 4.6115 0.0021 885 350.7 4.691 -0.059 895 356.8 4.5907 -0.0683 905 363 4.6158 -0.1066 915 369.1 4.5868 -0.1205 925 375.2 4.1145 0.3152 935 381.3 4.1234 0.3619 945 387.4 4.0264 0.3427 955 393.6 4.1205 0.0745 965 399.7 3.7458 0.49 975 405.7 3.2115 0.573 985 411.3 3.339 0.565 995 416.8 3.5148 0.8727 1005 422.3 4.0009 0.5711 1015 427.9 4.6179 0.0747 1025 433.4 4.961 0.0269 1027 434.5 4.8273 0.0286 1030 436.2 5.0513 -0.1581 1037 440 4.6131 -0.0058 1047 445.5 4.8688 -0.2344 1057 451 4.7243 -0.0266 1067 456.5 4.421 0.053 1077 462 4.3848 0.0351 1087 467.5 4.2454 0.2064 1097 473 4.646 0.0935 1107 478.5 3.8645 0.4682 1117 484 3.8082 0.5576 1127 489.9 3.6426 0.8078 1137 497.6 3.8169 0.7432 1147 505.3 3.5775 0.7775 1157 513 4.056 0.9017 1167 520.7 4.157 0.586 1177 528.4 4.1685 0.3715 1187 536.1 4.1569 0.1488 1197 543.7 4.4481 0.2179 1207 551.5 4.4825 0.0277 1217 559.5 3.9273 0.3787 1227 567.4 3.8631 0.4321 1237 575.5 3.8208 0.4055 1247 586.3 3.8914 0.2827 1257 597.1 4.2497 0.0825 1267 607.9 3.884 0.202 1277 616.8 3.9112 0.4209 1287 623 4.5494 0.1376 1297 629.2 4.8241 -0.0896 1307 639.3 4.828 -0.0332 1317 651.7 4.4366 -0.0638 1327 664.1 4.3526 -0.1186 1337 676.5 4.225 0.0833 1347 688.9 4.0359 0.0396 1354 697.2 3.819 0.4164 1364 703.6 4.3578 0.2625 1374 709.9 4.1324 0.3801 1384 716.2 4.5315 0.0206 1394 726.1 4.5417 -0.0812 1404 740.2 4.3363 0.0101 1414 748.4 4.5488 -0.1487 1424 757.2 4.3709 -0.2922 1434 766.1 4.1499 0.1104 1444 774.9 4.0235 0.2407 1454 783.2 3.9245 0.1822 1464 786.9 4.0416 0.0986 1474 790.6 4.0872 -0.2094 1484 794.3 4.3475 -0.2065 1494 798 4.4143 -0.0999 1504 808.7 4.3933 -0.096 1514 819.9 3.7635 -0.0019 1524 831.1 4.0066 0.0795 1534 842.3 3.7803 0.1235 1544 853.5 3.7401 0.1921 1554 861.3 3.8162 0.1532 1564 867.1 4.0226 0.0523 1574 872.8 4.6074 -0.0424 1584 880.2 4.6324 -0.0475 1594 889.9 4.4352 -0.029 1604 899.5 4.439 0.0605 1609 904.4 4.0686 -0.2599 1614 909.2 4.112 -0.269 1619 914 4.238 -0.3436 1624 918.9 4.2031 0.0321 1634 928.5 4.0073 0.3121 1644 938.2 3.9006 0.1086 1654 947.8 3.8102 0.2612 1664 956.6 3.5728 0.3205 1674 962.5 4.0937 0.1768 1684 968.4 4.3238 0.2063 1694 974.2 4.1456 0.2124 1704 980.1 4.0373 0.3122 1714 985.9 4.2527 0.2568 1724 991.8 4.1084 0.3375 1734 997.6 4.2518 0.1725 1744 1003.5 4.1093 0.3642 1754 1009.3 3.978 0.4584 1759 1012.3 4.0707 0.3002 1764 1015.2 3.8419 0.4751 1769 1018.1 3.9224 0.3533 1774 1020.9 4.0885 0.3407 1779 1023.7 3.7173 0.3261 1784 1026.2 4.042 0.0539 1789 1028.7 4.2571 0.1903 1794 1031.1 4.3362 0.1165 1799 1033.6 4.3026 -0.0024 1804 1036.7 4.351 -0.2609 1809 1039.7 4.3105 0.0389 1814 1044.5 3.999 0.0148 1819 1049.4 4.2023 0.0811 1824 1054.2 3.7421 0.3087 1829 1059 3.51 0.52 1839 1068.7 3.4046 0.4926 1844 1074 3.3524 0.4874 1849 1079.2 4.1034 0.4742 1854 1084.5 3.9632 0.4047 1859 1089.8 4.1938 0.3334 1864 1095.1 4.3112 0.0811 1869 1100.4 4.1559 0.2738 1874 1104.9 4.0838 0.1593 1879 1109.4 4.0929 0.2236 1884 1113 4.2137 0.2186 1889 1116.6 4.2282 0.125 1894 1120.2 4.3138 0.2494 1899 1123.8 4.5776 0.1142 1909 1131.9 4.4666 0.1422 1919 1140.4 3.7664 0.3667 1929 1148.8 3.9354 0.4389 1939 1157.3 3.8669 0.6292 1944 1161.5 3.6865 0.5238 1949 1165.7 3.8549 0.6702 1954 1169.9 3.8574 0.6707 1959 1174.2 3.741 0.5513 1964 1178.4 3.8198 0.4413 1969 1182.6 3.7257 0.6725 1974 1186.5 3.8877 0.5298 1979 1190.3 3.9754 0.4451 1984 1194.1 3.7376 0.4996 1989 1197.9 4.3846 0.067 1994 1200.8 4.1377 0.1945 1999 1203.8 4.274 0.3057 2004 1206.8 4.1133 0.2558 2009 1209.7 4.3248 -0.0516 2014 1212.7 4.0456 0.0307 2019 1215.7 4.3409 -0.096 2024 1218.6 4.4651 0.1545 2029 1221.6 4.2344 0.0924 2034 1224.6 4.166 0.5406 2039 1227.5 3.9934 0.4722 2044 1230.5 3.8846 0.5683 2049 1233.4 3.7128 0.6003 2054 1236 3.3965 0.535 2058 1238.1 3.722 0.523 2063 1240.7 3.4959 0.3993 2068 1243.2 4.3236 0.0813 2073 1245.8 4.3509 -0.0762 2078 1248.4 4.6496 0.2325 2083 1252.1 4.3158 -0.0291 2088 1255.8 4.5122 0.3515 2093 1259.5 4.2471 0.2819 2098 1263.2 4.1754 0.6032 2103 1266.8 3.8285 0.294 2108 1270.5 3.422 0.4089 2113 1274.2 3.7213 0.3254 2118 1277.9 3.9712 0.5931 2128 1284.8 4.2108 0.3831 2138 1291.7 4.2923 0.2116 2143 1295.2 4.2201 0.1181 2148 1298.8 4.4945 0.194 2153 1302.9 4.1132 -0.0107 2158 1307 4.2421 0.2966 2163 1311.3 4.1704 0.4391 2168 1315.5 4.165 0.3024 2173 1320 3.7807 0.3237 2178 1324.6 4.2772 0.2228 2183 1329.1 4.1426 0.1127 2188 1333.6 4.5238 0.0723 2193 1337.8 4.3773 -0.1174 2198 1341.9 4.4598 0.0403 2203 1345.9 3.9791 0.2272 2208 1349.8 3.6722 0.4036 2213 1353.8 3.6514 0.3729 2218 1357.7 3.8584 0.4068 2223 1361.6 3.9281 0.2348 2228 1365.6 4.0497 0.3096 2233 1369.6 4.1395 0.1731 2238 1373.6 4.051 0.1974 2243 1378 4.0426 0.0504 2248 1382.4 3.9309 0.1737 2253 1386.8 4.0722 0.2737 2258 1391.2 3.812 0.544 2263 1395.7 3.5313 0.3882 2268 1400.1 3.7748 0.6553 2273 1404.6 3.9858 0.4133 2278 1409.2 4.2431 0.2154 2283 1412.9 3.9663 0.1641 2288 1416.6 4.1672 0.1571 2293 1419.9 4.0816 0.064 2298 1423.2 3.7182 0.418 2303 1426.4 3.2473 0.1059 2308 1429.7 3.6661 0.454 2318 1436.3 3.3392 0.302 2323 1440.1 3.4411 0.434 2328 1443.9 3.4449 0.4027 2333 1447.7 4.0518 -0.0556 2338 1451.4 3.967 0.1447 2343 1455.3 4.2459 0.036 2348 1459.1 4.2882 0.2054 2353 1463 4.1967 0.1039 2358 1466.9 3.6238 0.5413 2363 1470.8 3.1591 0.1238 2368 1474.8 3.5147 0.544 2373 1478.3 3.6351 0.5181 2378 1481.7 3.5519 0.4658 2383 1484.7 3.6024 0.3772 2388 1487.7 3.7705 0.2854 2398 1493.7 4.3415 0.0823 2408 1501.2 4.3481 0.3 2418 1515.3 3.8765 0.6955 2428 1529.4 4.1127 0.3645 2438 1543.5 4.4225 0.1191 2448 1557.6 4.1833 0.0941