# Northern Okinawa Trough Geochemical, Sedimentary and Oxygen Isotope Data during the last 24.3 ka #----------------------------------------------------------------------- # World Data Center for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # NOTE: Please cite original publication, online resource and date accessed when using this data. # If there is no publication information, please cite Investigator, title, online resource and date accessed. # # Description/Documentation lines begin with # # Data lines have no # # # Online_Resource: http://www.ncdc.noaa.gov/paleo/study/18755 # Online_Resource: http://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/chang2015/chang2015-d18o-gs.txt # # Archive: Paleoceanography # # Parameter_Keywords: geochemistry, physical properties, oxygen isotopes, carbon isotopes #--------------------------------------- # Contribution_Date # Date: 2015-06-03 #--------------------------------------- # Title # Study_Name: Northern Okinawa Trough Geochemical, Sedimentary and Oxygen Isotope Data during the last 24.3 ka #--------------------------------------- # Investigators # Investigators: Chang, Fengming; Li, Tiegang; Xiong, Zhifang; Xu, Zhaokai #--------------------------------------- # Description and Notes # Description: Detailed records of multiple proxies constraining terrigenous discharge to the northern Okinawa Trough during the last 24.3 ka # Provided Keywords: terrigenous input; sea-level change; East China Sea #--------------------------------------- # Publication # Authors: Fengming Chang, Tiegang Li, Zhifang Xiong and Zhaokai Xu # Published_Date_or_Year: 2015 # Published_Title: Evidence for sea-level and monsoonally-driven variations in terrigenous input to the northern East China Sea during the last 24.3 ka # Journal_Name: Paleoceanography # Volume: 30 # Issue: # Pages: # DOI: 10.1002/2014PA002733 # Abstract: Geochemical and sedimentological analyses of core PC-1 recovered from the northern East China Sea (ECS) provide insights into variations in terrigenous input associated with sea-level and climate changes over the past 24.3 ka. Based on high-resolution multiproxy records, our results suggest that the competing processes of sea-level and monsoonally-driven precipitation determined terrigenous input to the northern ECS. Dominance of terrigenous material, along with relatively light G. ruber d18O, indicate that the Last Glacial Maximum (LGM) lowstand of sea-level have occurred during the period 21.5-19.6 ka, not suggesting an early slow rise but supporting the conventional LGM age of 21 ka. This LGM lowstand was terminated by the rapid sea-level rise of 19-ka MWP, which is well expressed by the nearly synchronous decreases in both terrigenous detritus and mean grain size from 19.6 to 18.9 ka. MWP-1A is clearly marked in our records by a sharp reduction in terrigenous input and pronounced maxima of G. ruber d18O at 15.3-14.8 ka, given the considerable age uncertainties of deglacial marine radiocarbon samples. A slightly increasing input of terrigenous matter is noted after 13.4 ka, potentially pointing to a sea-level fall following the Inter-Allerød Cooling Period (IACP), which was seldom reported previously. Although MWP-1B did not leave robust signatures in terrigenous input, it is explicitly captured by the heavy d18O of G. ruber and decline in mean grain size at 11.5-10.9 ka. MWP-1c probably occurred in a broad millennial interval with multiple peaks, which are robustly marked by the abrupt variations in terrigenous input and marine organic matter at 9.7-9.3 and 9.1 ka, respectively. During the late Holocene, the effect of continuously weakening monsoon precipitation overwhelmed that of stable sea-level resulting in a uniform increase in the proportion of marine-derived organic matter after 5.5 ka. #--------------------------------------- # Funding_Agency # Funding_Agency_Name: # Grant: #--------------------------------------- # Site Information # Site_Name: PC-1 # Location: Western Pacific Ocean # Country: # Northernmost_Latitude: 31.458333 # Southernmost_Latitude: 31.458333 # Easternmost_Longitude: 128.413333 # Westernmost_Longitude: 128.413333 # Elevation: -590 #--------------------------------------- # Data_Collection # Collection_Name: PC-1 d18O GS Chang15 # First_Year: 24300 # Last_Year: 78 # Time_Unit: cal yr BP # Core_Length: 812 m # Notes: #--------------------------------------- # Chronology_Information # Chronology: # Accession Number depth_top depth_bottom AMS 14C Age ± Error (a BP) Calendar Age (a BP) 2 s range of calendar Age (a BP) Materials /Species Remarks # OS-59020 8 12 1290±30 781 702-880 N. dutertrei Accepted # OS-59102 64 68 3880±30 3780 3680-3879 N. dutertrei Accepted # OS-74457 128 130 6890±50 7358 7255-7446 Mixed shells Accepted # OS-57323 148 152 7000±50 7458 7365-7556 N. dutertrei Rejectd # Beta-370655 182 184 8770±30 9404 9303-9468 Mixed shells Accepted # OS-59100 220 224 9160±40 9846 9675-10043 N. dutertrei Accepted # Beta-370656 324 326 11460±40 12863 12719-13000 Mixed shells Accepted # OS-57395 350 352 12150±70 13550 13378-13739 N. dutertrei Accepted # Beta-370657 380 382 12960±50 14751 14338-15072 Mixed shells Accepted # OS-59186 404 406 9360±50 10153 9990-10240 N. dutertrei Rejectd # Beta-370658 412 414 11640±40 13076 12919-13207 Mixed shells Rejectd # OS-74458 420 422 12150±45 13540 13406-13698 Mixed shells Rejectd # Beta-370659 446 452 13550±60 15709 15417-15954 Mixed shells Accepted # OS-57328 498 502 13850±50 16120 15919-16291 N. dutertrei Accepted # Beta-370660 526 532 15210±60 17954 17754-18142 Mixed shells Accepted # OS-59017 596 600 17000±60 19964 19728-20164 Mollusc Accepted # OS-59018 706 710 18100±60 21342 21063-21588 Mollusc Accepted # OS-57336 750 754 19200±95 22604 22403-22873 N. dutertrei Accepted # OS-59011 808 810 13650±80 15857 15581-16121 N. dutertrei Rejectd #--------------------------------------- # Variables # Data variables follow that are preceded by "##" in columns one and two. # Variables list, one per line, shortname-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_calkaBP age, , , calendar kiloyears before 1950AD, , , , ,N ## d18Og.rub delta 18O,Globigerinoides ruber,, per mil PDB,,paleoceanography,,analytical technique: isotope ratio mass spectrometry,N ## grainsize.µm mean grain size,,,µm,,paleoceanography,,determined using a Cilas940L laser diffraction particle analyzer,N #------------------------ # Data # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Value: NaN Depth_cm age_calkaBP d18Og.rub grainsize.µm 1 0.0781 -2.1 5.433132702 3 0.2343 -1.695 5.528102189 5 0.3905 -1.928 5.090418552 7 0.5467 -2.572 5.928981457 9 0.7029 -2.623 5.444442339 11 0.834553571 -2.048 5.093948185 13 0.941660714 -2.575 5.062269396 15 1.048767857 -2.504 5.237158561 17 1.155875 -2.052 5.200982864 19 1.262982142 -1.933 5.136495157 21 1.370089285 -2.615 5.644259367 23 1.477196428 -1.696 5.325010185 25 1.584303571 NaN 5.593627895 26.5 1.664633928 -1.719 5.711161908 27.65 1.726220535 -1.665 5.030787615 28.85 1.790484821 -1.761 5.280901692 30 1.852071428 -2.109 5.336094753 31.15 1.913658035 -2.237 5.222658185 32.25 1.972566963 NaN 5.204589161 33.4 2.03415357 -2.211 5.179397501 35 2.119839285 -2.431 5.53577108 37 2.226946428 -2.351 5.433132702 39 2.33405357 -2.579 5.204589161 41 2.441160713 -1.852 5.321320448 43 2.548267856 -2.568 5.118724234 45 2.655374999 -2.164 5.350910078 47 2.762482142 -2.152 5.125825213 49 2.869589284 -2.403 5.313948642 51 2.976696427 -2.303 5.395603313 53 3.08380357 -2.137 5.165057051 55 3.190910713 -2.479 5.369487092 57 3.298017856 -2.143 5.295563777 59 3.405124998 -2.041 5.54345061 61 3.512232141 NaN 5.150756307 63 3.619339284 -1.88 5.190178961 65 3.726446427 NaN 5.255340658 67 3.836793651 -2.17 5.240789941 69 3.950380953 -2.324 5.32870248 71 4.063968254 -1.804 5.376935944 73 4.177555556 -2.218 5.140056738 75 4.291142858 -2.122 5.306587049 77 4.404730159 -1.947 5.354620332 79 4.518317461 -1.849 5.165057051 81 4.631904762 -2.029 5.730989626 83 4.745492064 -1.628 5.244423839 85 4.859079366 -1.733 5.343497281 87 4.972666667 -2.514 6.020086784 89 5.086253969 -2.218 5.365766537 91 5.19984127 -2.57 6.726165534 93 5.313428572 -2.575 6.003418677 95 5.427015874 -1.751 5.89619519 97 5.540603175 -1.987 5.365766537 99 5.654190477 -2.067 5.924873224 101 5.767777778 NaN 6.55585654 103 5.88136508 -1.986 6.297522121 105 5.994952382 -1.773 7.319698804 107 6.108539683 -2.335 6.133813427 109 6.222126985 -2.039 7.218926347 111 6.335714286 -2.203 6.583178355 113 6.449301588 -2.352 7.694269085 115 6.56288889 -2.045 6.891338791 117 6.676476191 NaN 7.54637757 119 6.790063493 -1.919 8.326927626 121 6.903650794 -0.549 8.992886651 123 7.017238096 -2.251 7.694269085 125 7.130825398 -2.698 10.58378889 127 7.244412699 -2.589 8.513688377 129 7.358000001 -1.548 9.290680586 131 7.433777779 -2.415 5.738939974 133 7.509555557 -2.384 5.620834297 135 7.585333335 -2.502 5.376935944 137 7.661111113 -1.938 5.520443921 139 7.73688889 -1.907 5.347202395 141 7.812666668 -2.682 6.492545794 143 7.888444446 -1.597 5.376935944 145 7.964222224 -2.247 5.620834297 147 8.040000002 -1.933 5.644259367 149 8.115777779 -2.115 5.843303744 151 8.191555557 -1.454 5.168638437 153 8.267333335 -2.453 5.88802699 155 8.343111113 NaN 5.467132287 157 8.418888891 -1.823 5.150756307 159 8.494666668 -2.307 6.11683044 161 8.570444446 -2.488 5.497532716 163 8.646222224 -2.413 5.516618767 165 8.722000002 -2.244 5.501344636 167 8.79777778 -2.45 5.578140546 169 8.873555557 -2.343 5.433132702 171 8.949333335 -2.582 5.486112796 173 9.025111113 -2.398 5.578140546 175 9.100888891 -1.882 5.648173026 177 9.176666669 -0.923 5.478512698 179 9.252444446 -2.126 5.332397335 181 9.328222224 -2.115 5.609158245 183 9.404000002 -2.537 5.222658185 185 9.426666661 -1.943 5.60527162 187 9.449333327 -2.018 5.574275413 189 9.471999994 NaN 5.667782062 191 9.49466666 -1.811 5.656008486 193 9.517333327 -2.079 5.589752031 195 9.539999994 -0.467 5.656008486 197 9.56266666 0.099 5.613047565 199 9.585333327 -1.895 5.380664244 201 9.607999993 -0.715 5.585878853 203 9.63066666 NaN 5.723050291 205 9.653333327 -1.872 5.71908475 207 9.675999993 -1.721 5.656008486 209 9.69866666 NaN 5.493723437 211 9.721333326 -2.324 5.671712031 213 9.743999993 NaN 5.835208817 215 9.76666666 -1.693 5.738939974 217 9.789333326 -1.058 5.656008486 219 9.811999993 NaN 5.512796263 221 9.834666659 -1.247 5.593627895 223 9.875291254 NaN 5.508976408 225 9.933873778 -2.121 5.613047565 227 9.992456303 -2.068 5.26263116 229 10.05103883 -1.235 5.64034842 231 10.10962135 -1.575 5.593627895 233 10.16820388 -1.498 5.455775517 235 10.2267864 -1.884 5.71908475 237 10.28536892 -1.268 5.978503007 239 10.34395145 NaN 6.007581372 241 10.40253397 -1.99 5.644259367 243 10.4611165 -1.853 5.451995172 245 10.51969902 -0.379 6.045175756 247 10.57828154 -0.787 5.48231143 249 10.63686407 -0.839 5.56655318 251 10.69544659 -1.935 5.933092538 253 10.75402912 -1.557 5.562696077 255 10.81261164 -0.675 5.403088395 257 10.87119417 -1.325 6.323767317 259 10.92977669 -2.34 5.715121956 261 10.98835921 -0.858 6.053561961 263 11.04694174 -0.756 5.847355417 265 11.10552426 -0.914 5.738939974 267 11.16410679 -0.88 5.489916798 269 11.22268931 0.073 5.613047565 271 11.28127183 NaN 6.032618227 273 11.33985436 -0.532 5.933092538 275 11.39843688 0.383 6.19792065 277 11.45701941 -0.788 5.802941096 279 11.51560193 -0.529 6.24535805 281 11.57418446 0.036 6.11683044 283 11.63276698 -0.76 5.982648426 285 11.6913495 -1.333 6.341324851 287 11.74993203 -0.769 6.688970973 289 11.80851455 -0.712 7.22393186 291 11.86709708 -1.223 6.533174999 293 11.9256796 -0.795 6.385432254 295 11.98426213 -0.614 6.345721847 297 12.04284465 -1.012 6.48355145 299 12.10142717 -1.653 5.982648426 301 12.1600097 -1.497 5.933092538 303 12.21859222 0.048 6.354524985 305 12.27717475 -1.495 6.083005399 307 12.33575727 NaN 7.055675861 309 12.39433979 NaN 6.456643111 311 12.45292232 -0.429 7.457976673 313 12.51150484 -1.043 7.494250932 315 12.57008737 -1.239 8.501894076 317 12.62866989 -0.995 10.07553321 319 12.68725242 -1.115 10.80617679 321 12.74583494 -1.638 6.721504927 323 12.80441746 -1.42 6.896117159 325 12.86299999 -1.01 7.657026682 327 12.91584615 -1.941 6.20221821 329 12.9686923 NaN 6.219438272 331 13.02153845 -1.217 6.258358419 333 13.07438461 -1.29 6.099894473 335 13.12723076 -1.097 6.328152138 337 13.18007692 -0.987 6.596881933 339 13.23292307 -1.149 6.078790442 341 13.28576922 -1.371 5.933092538 343 13.33861538 0.132 6.306258395 345 13.39146153 -1.118 7.375722025 347 13.44430768 -1.562 6.095667814 349 13.49715384 -1.175 6.146581604 351 13.54999999 -0.872 6.438766289 353 13.63006665 -1.396 6.28879795 355 13.71013332 -0.033 5.966083976 357 13.79019999 -1.14 6.319385534 359 13.87026665 0.137 6.254021958 361 13.95033332 NaN 5.999258866 363 14.03039999 -1.095 6.497047644 365 14.11046665 -0.089 6.232384686 367 14.19053332 -1.138 6.385432254 369 14.27059999 -1.166 7.109678313 371 14.35066665 -0.707 6.381007743 373 14.43073332 -0.868 6.86749657 375 14.51079999 -0.568 6.50606071 377 14.59086665 -1.075 6.297522121 379 14.67093332 -0.772 6.328152138 381 14.75099999 NaN 6.354524985 383 14.77917647 -0.858 6.574058455 385 14.80735294 -0.145 6.829520472 387 14.83552941 -0.402 7.045901394 389 14.86370588 -0.975 7.045901394 391 14.89188236 -0.753 6.758880395 393 14.92005883 -0.976 6.615197753 395 14.9482353 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7.060568178 689 21.1039818 -0.979 7.154169425 691 21.12903634 -0.253 6.787048321 693 21.15409089 -0.58 6.564951189 695 21.17914544 NaN 7.385954037 697 21.20419998 NaN 7.478683267 699 21.22925453 -0.582 7.380836258 701 21.25430907 -0.319 7.243988644 703 21.27936362 -0.395 7.720981652 705 21.30441816 -0.161 7.427024228 707 21.32947271 -0.373 6.777645993 709 21.37068183 -0.752 7.726335284 711 21.42804547 -0.126 7.630535383 713 21.4854091 0.381 7.694269085 715 21.54277274 -0.154 7.641120886 717 21.60013638 0.077 7.045901394 719 21.65750001 0.11 7.29437457 721 21.71486365 -0.108 7.483868892 723 21.77222729 -0.292 7.134361328 725 21.82959092 -0.361 6.777645993 727 21.88695456 -0.021 6.592310907 729 21.9443182 -0.065 6.707542472 731 22.00168183 -0.326 7.085080695 733 22.05904547 -0.491 7.139308205 735 22.1164091 -0.26 6.702894769 737 22.17377274 NaN 7.075265492 739 22.23113638 -0.815 7.050786933 741 22.28850001 -0.615 6.905683836 743 22.34586365 -0.38 6.693609022 745 22.40322729 NaN 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