noaa-ocean-1001374 eng; USA utf8 dataset Bauer, Bruce DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce +1 303-497-6280 +1 303-497-6513 325 Broadway, E/CC23 Boulder CO 80305-3328 USA paleo@noaa.gov pointOfContact 2018-12-11 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) NOAA/WDS Paleoclimatology - Line Islands Survey and Coring Cruise Multi-sensor Track, Isotope and Radiocarbon Data 2014-04-23 publication noaa-ocean-1001374 NCEI DSI 1200_01 Lynch-Stieglitz, J. originator Lynch-Stieglitz, J. author Polissar, P.J. originator Polissar, P.J. author NOAA National Centers for Environmental Information publisher tableDigital This archived Paleoclimatology Study is available from the NOAA National Centers for Environmental Information (NCEI), under the World Data Service (WDS) for Paleoclimatology. The associated NCEI study type is Paleoceanography. The data include parameters of paleocean (oxygen isotopes) with a geographic location of Central Pacific Ocean. The time period coverage is from Unavailable begin date to Unavailable end date in calendar years before present (BP). See metadata information for parameter and study location details. Please cite this study when using the data. Records of past climate and ocean circulation derived from marine sediments. Parameter keywords describe what was measured in this dataset. Additional summary information can be found in the abstracts of papers listed in the dataset citations. completed Bauer, Bruce DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce +1 303-497-6280 +1 303-497-6513 325 Broadway, E/CC23 Boulder CO 80305-3328 USA paleo@noaa.gov pointOfContact https://www.ncdc.noaa.gov/c/images/pc-default-ocean.png Paleoclimatology - Paleoceanography PNG Earth Science > Paleoclimate > Ocean/Lake Records Earth Science > Climate Indicators > Paleoclimate Indicators > Ocean/Lake Records theme Global Change Master Directory (GCMD) Science Keywords 2018 revision Version 8.6 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords HTTPS Web Browser Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher earth science > paleoclimate > paleocean > oxygen isotopes Unspecified keyword > earth science > paleoclimate > paleocean > carbon isotopes earth science > paleoclimate > paleocean > physical properties earth science > paleoclimate > paleocean > age control theme Global Change Master Directory (GCMD) Science Keywords 2018 revision Version 8.6 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords HTTPS Web Browser Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher Ocean > Pacific Ocean > Central Pacific Ocean> ML1208-25 > LATITUDE 2.462667 > LONGITUDE -159.395 Ocean > Pacific Ocean > Central Pacific Ocean> ML1208-31 > LATITUDE 4.682867 > LONGITUDE -160.051883 Ocean > Pacific Ocean > Central Pacific Ocean> ML1208-37 > LATITUDE 7.0436 > LONGITUDE -161.634717 Ocean > Pacific Ocean > Central Pacific Ocean> ML1208-01 > LATITUDE 21.1995 > LONGITUDE -158.525167 Ocean > Pacific Ocean > Central Pacific Ocean> ML1208-35 > LATITUDE 6.669433 > LONGITUDE -160.7307 Ocean > Pacific Ocean > Central Pacific Ocean> ML1208-06 > LATITUDE 6.408 > LONGITUDE -161.0075 Ocean > Pacific Ocean > Central Pacific Ocean> ML1208-11 > LATITUDE 1.469133 > LONGITUDE -157.5805 Ocean > Pacific Ocean > Central Pacific Ocean> ML1208-18 > LATITUDE .58555 > LONGITUDE -156.659133 Ocean > Pacific Ocean > Central Pacific Ocean> ML1208-28 > LATITUDE 2.971817 > LONGITUDE -159.198183 Ocean > Pacific Ocean > Central Pacific Ocean> ML1208-36 > LATITUDE 6.827 > LONGITUDE -161.0411 Ocean > Pacific Ocean > Central Pacific Ocean> ML1208-40 > LATITUDE 8.340967 > LONGITUDE -159.69715 Ocean > Pacific Ocean > Central Pacific Ocean> ML1208-15 > LATITUDE .1645 > LONGITUDE -156.117433 Ocean > Pacific Ocean > Central Pacific Ocean> ML1208-16 > LATITUDE .48195 > LONGITUDE -156.448117 Ocean > Pacific Ocean > Central Pacific Ocean> ML1208-23 > LATITUDE 1.344667 > LONGITUDE -157.4172 Ocean > Pacific Ocean > Central Pacific Ocean> ML1208-08 > LATITUDE 6.398 > LONGITUDE -160.768717 Ocean > Pacific Ocean > Central Pacific Ocean> ML1208-10 > LATITUDE 5.197667 > LONGITUDE -160.434 Ocean > Pacific Ocean > Central Pacific Ocean> ML1208-13 > LATITUDE -.2196 > LONGITUDE -155.961183 Ocean > Pacific Ocean > Central Pacific Ocean> ML1208-27 > LATITUDE 2.769033 > LONGITUDE -159.291217 Ocean > Pacific Ocean > Central Pacific Ocean> ML1208-19 > LATITUDE .825217 > LONGITUDE -156.867183 Ocean > Pacific Ocean > Central Pacific Ocean> ML1208-30 > LATITUDE 4.322467 > LONGITUDE -159.728867 Ocean > Pacific Ocean > Central Pacific Ocean> ML1208-32 > LATITUDE 5.197317 > LONGITUDE -160.434317 Ocean > Pacific Ocean > Central Pacific Ocean> ML1208-12 > LATITUDE -.21955 > LONGITUDE -155.961233 Ocean > Pacific Ocean > Central Pacific Ocean> ML1208-17 > LATITUDE .4815 > LONGITUDE -156.448167 Ocean > Pacific Ocean > Central Pacific Ocean> ML1208-22 > LATITUDE 1.273767 > LONGITUDE -157.262117 Ocean > Pacific Ocean > Central Pacific Ocean> ML1208-24 > LATITUDE 2.462633 > LONGITUDE -159.3952 Ocean > Pacific Ocean > Central Pacific Ocean> ML1208-34 > LATITUDE 5.623633 > LONGITUDE -160.7933 Ocean > Pacific Ocean > Central Pacific Ocean> ML1208-07 > LATITUDE 6.398126 > LONGITUDE -160.768601 Ocean > Pacific Ocean > Central Pacific Ocean> ML1208-20 > LATITUDE 1.2735 > LONGITUDE -157.261833 Ocean > Pacific Ocean > Central Pacific Ocean> ML1208-41 > LATITUDE 8.2609 > LONGITUDE -158.966333 place otherRestrictions Cite as: Lynch-Stieglitz, J.; Polissar, P.J. (2014-04-23): NOAA/WDS Paleoclimatology - Line Islands Survey and Coring Cruise Multi-sensor Track, Isotope and Radiocarbon Data. [indicate subset used]. NOAA National Centers for Environmental Information. https://www.ncdc.noaa.gov/paleo/study/1001374. Accessed [date]. otherRestrictions Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives. otherRestrictions Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose. otherRestrictions None otherRestrictions Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site. Glacial-interglacial changes in Central Tropical Pacific surface seawater property gradients 2015 publication Lynch-Stieglitz, J., P.J. Polissar, A.W. Jacobel, S.A. Hovan, R.A. Pockalny, M. Lyle, R.W. Murray, A.C. Ravelo, S.C. Bova, A.G. Dunlea, H.L. Ford, J.E. Hertzberg, C.A. Wertman, A.E. Maloney, J.K. Shackford, K. Wejnert, and R.C. Xie author Paleoceanography publisher https://doi.org/10.1002/2014PA002746 HTTPS Web Browser Associated Reference published 2015 Lynch-Stieglitz, J., P.J. Polissar, A.W. Jacobel, S.A. Hovan, R.A. Pockalny, M. Lyle, R.W. Murray, A.C. Ravelo, S.C. Bova, A.G. Dunlea, H.L. Ford, J.E. Hertzberg, C.A. Wertman, A.E. Maloney, J.K. Shackford, K. Wejnert, and R.C. Xie, 2015: Glacial-interglacial changes in Central Tropical Pacific surface seawater property gradients. Paleoceanography, 30, 423-438, 10.1002/2014PA002746 information crossReference sciencePaper eng; USA geoscientificInformation Paleo date information not available. -161.634717 -155.961183 -.2196 21.1995 1950 STUDY NOTES: Cruise MGL1208 data to characterize the sediments on the Line Islands Ridge and collect sediment cores suitable for paleoceanographic research. ISOTOPE METHODS: Cores 15GC, 18GC, 20BB, 28BB, 31BB, 34BB, 35BB, 37BB (Georgia Tech): Samples were dried overnight at 65°C, weighed, washed through 63 µm sieve with dionized water, and the washed samples were then dried overnight at 65°C. Fifteen specimens of G. ruber (white) were picked from the 250-355 µm size fraction and analyzed on a Thermo MAT253 with Kiel IV individual acid bath device. Values were converted to PDB via NBS-19 and an in-house standard, and NBS-18 values were monitored in each run. Replicate analyses of the in-house standard mixed in the sample runs yielded a 1-sigma standard deviation of .05‰ for d18O and 0.01‰ for d13C. Cores 6BB, 10GC, 11GC, 12GC, 17PC, 17TC, 19GC, 30BB (LDEO): Samples were processed and analyzed at LDEO by Allison Jacobel with oversight by Polissar. Samples were freeze-dried, washed through a 63 µm sieve and the >63µm fraction dried at 45 °C overnight. Seven or eight specimens of G. ruber (white) were picked from the 250-355 µm size fraction, weighed and analyzed on a Thermo Delta V with Kiel IV individual acid bath device. Values were calibrated to the VPDB isotope scale with NBS-19 and NBS-18. Reproducibility of the in-house standard (1-sigma) is ±0.06 ‰ (d18O) and ±0.04 ‰ (d13C). Use and Attribution These data are provided for the development of age models and as preliminary data for developing research projects on the MGL12-08 cores. The data and plots provided here may be freely used in funding proposals with appropriate attribution. Isotope data should be attributed as unpublished data, with this web site as the reference. Before using these data in a publication, please contact Jean Lynch-Stieglitz or Pratigya Polissar for further details and updates. Isotope Analysis Strategy Given the limited amount of time and number of analyses possible we strove to maximize the available stratigraphic information from the cores collected during MGL1208 as follows. 1) We used the very abundant planktonic foraminifera G. ruber to minimize picking time. However, this foraminifera can be more susceptible to dissolution effects than more robust foraminifera and the timing of surface water changes limits the precision to which these isotope records can be matched to a global benthic stack. 2) We established 2 benchmark cores at the northern and southern portions of the transect (17PC, 37BB). As measured using the MST, these cores had density changes with depth that were typical for the cores taken during the cruise. For these cores we measured the oxygen isotopic composition from top to bottom of the core. 3) All cores that had a clear match in MST density with the benchmark cores were not sampled and analyzed for oxygen isotopes. 4) For the remaining cores that did not have a clear match in MST density with the benchmark cores, we analyzed the top 240cm of the core. We did not analyze cores that contained sediments at the top or near the top that were late Pleistocene in age based on the biostratigraphy performed on board (see cruise report for details). Radiocarbon Data: Measurements were made at NOSAMS. Please consult their website for details on methods. Use and Attribution: Radiocarbon data are provided for the development of age models and as preliminary data for developing research projects on the MGL12-08 cores. The data and plots provided here may be freely used in funding proposals with appropriate attribution. Radiocarbon dates should be attributed as unpublished data, with this web site as the reference. Before using these data in a publication, please contact Jean Lynch-Stieglitz or Pratigya Polissar for further details and updates. ABSTRACT SUPPLIED BY ORIGINATOR: Much uncertainty exists about the state of the oceanic and atmospheric circulation in the tropical Pacific over the last glacial cycle. Studies have been hampered by the fact that sediment cores suitable for study were concentrated in the western and eastern parts of the tropical Pacific, with little information from the central tropical Pacific. Here we present information from a suite of sediment cores collected from the Line Islands Ridge in the central tropical Pacific, which show sedimentation rates and stratigraphies suitable for paleoceanographic investigations. Based on the radiocarbon and oxygen isotope measurements on the planktonic foraminifera Globigerinoides ruber, we construct preliminary age models for selected cores and show that the gradient in the oxygen isotope ratio of G. ruber between the equator and 8°N is enhanced during glacial stages relative to interglacial stages. This stronger gradient could reflect enhanced equatorial cooling (perhaps reflecting a stronger Walker circulation) or an enhanced salinity gradient (perhaps reflecting increased rainfall in the central tropical Pacific). 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Native Format(s) https://data.nodc.noaa.gov/cgi-bin/iso?id=noaa-ocean-1001374 HTTPS Landing Page NCEI landing page for this dataset Dataset landing page with general information and links to access the data. information https://www.ncdc.noaa.gov/paleo/study/1001374 HTTPS Web Browser NCEI Study Page Study page with dataset access information. search https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/paleoceanography HTTPS Information NCEI Paleoceanography Page General information for this data type. information https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/polissar2014/polissar2014.txt HTTPS Download /contributions_by_author/polissar2014/polissar2014.txt Original Data and Full Metadata download https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/polissar2014/isotopes/ HTTPS Download /contributions_by_author/polissar2014/isotopes/ Data Folder download https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/polissar2014/radiocarbon/ HTTPS Download /contributions_by_author/polissar2014/radiocarbon/ Data Folder download https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/polissar2014/mst/ HTTPS Download /contributions_by_author/polissar2014/mst/ Data Folder download asNeeded This metadata record was translated from DIF using dif-9x-to-iso-19115-2.xsl Version: 2018-10-25