# Equatorial Pacific One Million Year Trace Metal Data #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program # National Centers for Environmental Information (NCEI) #----------------------------------------------------------------------- # Template Version 3.0 # Encoding: UTF-8 # 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: https://www.ncdc.noaa.gov/paleo/study/32373 # Description: NOAA Landing Page # Online_Resource: https://www.ncei.noaa.gov/pub/data/paleo/contributions_by_author/pavia2021/pavia2021tt013-pc18.txt # Description: NOAA location of the template # # Original_Source_URL: # Description: # # Description/Documentation lines begin with # # Data lines have no # # # Data Type: Paleoceanography # # Dataset_DOI: # # Parameter_Keywords: geochemistry #--------------------------------------- # Contribution_Date # Date: 2021-01-18 #--------------------------------------- # File_Last_Modified_Date # Date: 2021-01-18 #--------------------------------------- # Title # Study_Name: Equatorial Pacific One Million Year Trace Metal Data #--------------------------------------- # Investigators # Investigators: Pavia, F.J.; Wang, S.; Middleton, J.L.; Murray, R.W.; Anderson, R.F. #--------------------------------------- # Description_Notes_and_Keywords # Description: Iron, manganese, and titanium concentration data from two sediment cores collected in the Equatorial Pacific Ocean, for the past million years. # Provided Keywords: Deglaciations, respired carbon, Pacific Ocean, Trace Metal, geochemistry, manganese, iron #--------------------------------------- # Publication # Authors: Pavia, F.J., Wang, S., Middleton, J.L., Murray, R.W., Anderson, R.F. # Published_Date_or_Year: 2021 in review # Published_Title: Trace Metal Evidence for Deglacial Ventilation of the Abyssal Pacific and Southern Oceans # Journal_Name: Paleoceanography and Paleoclimatology # Volume: # Edition: # Issue: # Pages: # Report_Number: # DOI: # Online_Resource: # Full_Citation: # Abstract: The deep ocean has long been recognized as the reservoir that stores the carbon dioxide (CO2) removed from the atmosphere during Pleistocene glacial periods. The removal of glacial atmospheric CO2 into the ocean is likely modulated by changes in the degree of utilization of macronutrients at the sea surface and enhanced storage of respired CO2 in the deep ocean, known as enhanced efficiency of the biological pump. Enhanced biological pump efficiency during glacial periods is most easily documented in the deep ocean using proxies for oxygen concentrations, which are directly linked to respiratory CO2 levels. We document the enhanced storage of respired CO2 during the Last Glacial Maximum (LGM) in the Pacific Southern Ocean and deepest Equatorial Pacific using records of deglacial authigenic manganese, which form as relict peaks during increases in bottom water oxygen concentration. These peaks are found at depths and regions where other oxygenation histories have been ambiguous, due to diagenetic alteration of authigenic uranium, another proxy for bottom water oxygen. Our results require that the entirety of the abyssal Pacific below approximately 1000m was enriched in respired CO2 and depleted in oxygen during the LGM. The presence of authigenic Mn enrichment in the deep Equatorial Pacific for each of the last five deglaciations suggests that the storage of respired CO2 in the deep ocean is a ubiquitous feature of late-Pleistocene ice ages. #--------------------------------------- # Publication # Authors: Murray, R.W., C. Knowlton, M. Leinen, A.C. Mix, and C.H. Polsky # Published_Date_or_Year: 2000-12-01 # Published_Title: Export production and carbonate dissolution in the central equatorial Pacific Ocean over the past 1 Myr # Journal_Name: Paleoceanography # Volume: 15 # Edition: # Issue: 6 # Pages: 570-592 # Report_Number: # DOI: 10.1029/1999PA000457 # Online_Resource: https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/1999PA000457 # Full_Citation: # Abstract: In order to quantify changes in export production and carbonate dissolution over the past 1 Myr in the central equatorial Pacific Ocean we analyzed Ba, P, Al Ti, and Ca in 1106 samples from five piston cores gathered from 5S to 4N at 140W. We focused on Ba/Ti, Al/Ti, and P/Ti ratios as export proxies and employed areally integrated time slice as well as time series strategies. Carbonate maxima from 0-560 kyr are characterized by 15-30% greater export than carbonate minima. The increases in export fall on glacial d18O transitions rather than glacial maxima. From 560-800 kyr, overlapping with the mid-Pleistocene transition, there is a very large increase in total export yet no glacial-interglacial variability. The highest latitudes (5S and 4N) record minimal absolute export change from glacials to interglacials and yet record the most extreme minima in percent CaCO3, indicating that carbonate records there are dominated by dissolution, whereas near the equator they are more influenced by changes in export. #--------------------------------------- # Funding_Agency # Funding_Agency_Name: US National Science Foundation # Grant: OCE 93-01097, OCE OCE-9022301 #--------------------------------------- # Site_Information # Site_Name: TT013-PC18 # Location: Ocean>Pacific Ocean>Central Pacific Ocean # Northernmost_Latitude: -1.8395 # Southernmost_Latitude: -1.8395 # Easternmost_Longitude: -139.7137 # Westernmost_Longitude: -139.7137 # Elevation: 4354 #--------------------------------------- # Data_Collection # Collection_Name: Pavia2021TT013-PC18 # First_Year: 783100 # Last_Year: 0 # Time_Unit: cal yr BP # Core_Length: # Notes: #--------------------------------------- # Chronology_Information # Chronology: #--------------------------------------- # 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 depth,,,centimeter,,Paleoceanography,,,N, ## age_ky age,,,calendar kiloyear before present,,Paleoceanography,,,N,age from published age models; see metadata for publications ## Mn Manganese,sediment,,parts per million,,Paleoceanography,,inductively-coupled plasma optical emission spectroscopy,N,Errors are precision estimated from replicate analyses of sediment samples; one standard deviation 3%; as published in Murray et al. 2000 ## Fe Iron,sediment,,parts per million,,Paleoceanography,,inductively-coupled plasma optical emission spectroscopy,N,Errors are precision estimated from replicate analyses of sediment samples; one standard deviation 4%; as published in Murray et al. 2000 ## Ti Titanium,sediment,,parts per million,,Paleoceanography,,inductively-coupled plasma optical emission spectroscopy,N,Errors are precision estimated from replicate analyses of sediment samples; one standard deviation 3%; as published in Murray et al. 2000 # #------------------------ # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing_Values: -999 # depth age_ky Mn Fe Ti 8 -0.3104 365 1191 59.9 13 1.9628 436 990 56.6 18 3.96 402 874 48.8 23 6.0214 520 880 44.1 28 8.1834 1658 1096 43.2 33 10.5114 868 753 45.3 38 13.1342 1448 948 95.0 43 15.8 77 802 51.1 48 18.7 134 961 49.7 53 22.0 186 1043 52.4 58 25.4 203 1003 55.1 63 28.9 216 813 50.4 68 32.2 191 770 39.3 73 35.3 272 696 40.8 78 38.1 283 811 40.9 83 40.5 266 835 41.2 88 42.7 267 841 43.1 93 44.8 248 760 41.0 98 46.7 258 954 50.1 109 50.6 246 666 37.8 114 52.5 279 702 38.7 119 54.4 274 851 44.3 124 56.5 290 985 50.4 129 58.8 297 1167 82.0 134 61.4 293 1690 92.8 139 64.3 398 2332 125.7 144 67.7 397 2690 158.6 149 71.4 455 3174 177.7 154 75.3 419 2153 118.7 159 80.1 417 2169 117.9 164 86.6 535 2690 147.2 169 92.2 467 2736 147.3 179 101.1 425 2162 117.7 184 105.4 417 2291 125.0 189 110.3 451 2832 150.4 194 116.4 502 2169 -999 199 121.6 733 1371 82.2 204 126.3 1000 1380 79.9 209 129.0 429 1372 -999 214 131.8 606 990 59.4 219 134.2 660 1148 63.0 224 136.2 363 1040 53.6 229 138.2 525 977 58.6 234 140.2 702 1093 60.2 239 142.4 684 1163 62.1 244 144.9 886 1333 69.1 249 147.6 588 1338 -999 259 153.5 362 1450 79.8 264 156.4 364 1358 79.7 269 159.0 360 1467 82.7 279 163.4 337 1265 69.1 284 165.3 369 1222 63.1 289 167.3 575 1665 94.3 294 169.4 376 1885 104.6 299 172.0 395 2849 159.4 304 175.5 385 3620 199.7 309 180.1 389 4761 266.4 314 184.8 391 4429 248.1 319 189.1 264 2782 152.6 324 194.0 351 2338 123.9 329 204.0 280 2016 110.6 334 215.2 375 1778 95.8 339 219.6 663 1754 107.8 344 222.0 382 2278 111.5 349 224.3 312 2269 122.9 354 227.4 340 1531 78.5 359 231.9 350 1251 67.0 364 237.6 338 1138 62.0 374 245.9 1880 1182 67.5 379 248.6 390 1007 46.3 384 251.0 438 875 43.4 389 253.2 444 936 63.4 394 255.5 432 1094 57.3 399 258.0 387 1226 73.1 409 263.6 347 2654 148.4 414 266.4 363 3343 196.9 419 269.0 348 4241 243.5 424 271.2 261 6051 340.9 429 273.1 260 5664 323.2 434 273.6 247 3792 334.7 439 274.0 277 2894 169.1 444 274.4 283 3193 175.5 449 274.8 267 2634 138.1 454 275.4 287 2248 120.4 459 278.1 283 1991 109.0 464 282.6 241 2622 141.1 469 296.8 276 2961 155.3 479 322.3 335 842 44.8 484 327.8 351 871 48.0 489 331.8 474 1053 58.0 494 335.6 748 1162 72.8 499 340.0 400 1018 65.4 504 344.5 340 1112 60.6 509 348.4 314 1118 64.6 514 351.6 309 1088 65.2 519 354.9 245 1107 59.0 559 356.5 170 1741 324.6 564 356.9 190 2081 411.4 569 357.2 187 1508 280.9 574 357.6 197 1450 193.1 584 358.4 300 1682 59.8 589 358.8 313 1071 51.8 594 359.8 377 1455 65.2 599 360.8 286 2459 85.4 604 362.6 275 3478 145.8 609 364.4 248 2693 147.3 614 366.7 211 2526 206.7 619 368.3 238 2191 156.6 624 370.3 193 2902 172.6 629 373.0 247 2443 137.8 634 377.1 225 3294 176.7 639 382.6 287 3062 140.4 644 387.8 264 2860 148.0 649 391.7 223 3453 203.7 654 395.2 209 3088 182.6 659 399.4 178 3206 221.0 664 404.9 150 2971 195.0 669 410.9 304 1067 62.9 674 416.0 323 936 48.3 679 420.2 343 1149 46.0 684 423.8 348 1360 49.4 689 426.9 320 1189 54.6 694 430.1 346 937 38.6 704 436.2 339 1150 38.1 709 439.4 317 798 37.9 714 442.4 291 917 47.9 719 445.2 231 776 46.2 724 447.6 244 569 43.7 729 449.7 275 587 51.5 734 451.3 284 541 37.7 739 452.9 301 610 41.8 744 454.2 408 792 51.5 749 455.4 386 855 53.9 754 456.6 342 1049 70.3 759 457.9 325 902 59.3 764 459.5 325 986 61.6 769 461.6 264 1274 88.9 774 464.7 295 1358 94.0 779 469.0 318 2685 118.0 784 472.3 169 2335 181.9 789 475.5 161 4249 275.9 794 477.4 174 3152 239.8 799 479.1 220 3013 192.9 804 480.7 153 3208 176.0 809 483.0 251 1953 119.9 814 490.5 326 1189 -999 819 497.9 324 1135 74.4 824 507.5 318 1790 90.3 829 512.1 356 1433 78.8 844 519.2 406 891 47.0 849 520.8 401 1021 48.0 854 522.3 429 673 41.3 859 523.8 439 948 40.8 864 525.4 460 703 38.9 869 527.0 430 817 43.5 874 528.8 376 886 52.5 879 530.9 324 1090 61.0 884 533.7 268 1599 56.7 889 537.2 299 720 43.8 894 541.7 342 854 51.1 899 546.9 291 1211 75.4 904 552.5 254 1825 85.4 909 558.5 251 1705 -999 914 564.4 278 1533 91.2 919 570.0 243 1906 115.6 924 575.1 161 1803 118.7 929 579.3 244 1031 154.5 939 585.5 309 905 50.6 944 588.7 313 893 51.2 949 591.5 269 1151 64.3 954 594.5 252 1088 61.7 959 597.8 254 1003 64.8 964 601.2 281 874 57.5 969 604.5 268 976 56.9 974 607.7 250 1147 65.6 979 610.8 227 1232 68.8 984 614.1 249 1067 -999 989 617.7 343 757 40.5 994 621.7 372 807 43.4 1004 630.6 286 867 44.7 1009 634.7 295 665 40.5 1014 637.5 319 816 40.3 1019 640.3 215 566 30.3 1024 643.1 271 646 -999 1029 645.0 294 493 37.0 1034 646.7 288 544 33.7 1039 648.2 362 418 27.6 1044 649.6 365 426 23.0 1049 651.1 407 388 22.0 1054 652.4 390 441 23.0 1059 653.9 352 915 28.5 1064 656.3 382 471 25.2 1069 658.7 324 637 32.9 1074 661.2 333 668 40.8 1079 663.7 273 1005 49.6 1084 666.4 286 1364 59.4 1089 669.5 327 1371 58.0 1094 672.6 229 1500 41.0 1099 675.7 149 595 18.5 1104 679.1 140 498 -999 1109 680.0 326 849 36.2 1114 680.7 324 2009 50.4 1119 681.4 263 1615 42.0 1124 682.2 283 1231 56.4 1129 683.0 281 926 65.4 1134 684.0 304 1354 83.1 1139 685.0 179 1735 109.5 1149 687.7 213 1312 -999 1154 690.9 322 615 40.3 1159 695.6 311 708 45.6 1164 701.2 332 686 38.1 1169 706.3 364 522 26.1 1174 710.2 363 489 23.3 1179 713.1 410 707 80.7 1184 715.4 403 728 37.8 1189 717.5 309 875 53.6 1194 719.3 231 916 60.9 1199 721.0 292 671 43.4 1204 722.9 377 540 -999 1209 725.3 405 417 22.5 1214 728.7 466 375 25.5 1219 733.1 513 447 25.4 1224 737.4 565 440 24.3 1229 741.1 488 604 27.0 1234 744.3 439 436 36.6 1239 747.5 357 870 54.9 1244 750.9 359 795 53.6 1249 754.5 327 967 66.8 1254 758.3 259 1662 103.2 1259 762.1 277 1895 113.9 1264 765.8 247 1884 123.4 1269 769.4 201 2103 133.6 1274 772.9 195 1437 92.9 1279 776.3 333 615 47.2 1284 779.7 370 441 29.4 1289 783.1 400 604 -999