noaa-ocean-16914 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 2019-03-06 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) NOAA/WDS Paleoclimatology - Central Arctic Sedimentary 231Pa/230Th Ratios from the Past 35,000 Years 2014-07-10 publication noaa-ocean-16914 NCEI DSI 1200_01 Hoffmann, S.S. originator Hoffmann, S.S. author McManus, J.F. originator McManus, J.F. author Curry, W.B. originator Curry, W.B. author Brown-Leger, S. originator Brown-Leger, S. 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 paleoceanography with a geographic location of Arctic Ocean. The time period coverage is from 45920 to 1590 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 > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleocean > radiogenic isotope 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 > Arctic Ocean> PL94-AR BC20 > LATITUDE 83.18 > LONGITUDE 174.09 Ocean > Arctic Ocean> PL94-AR BC08 > LATITUDE 78.13 > LONGITUDE -176.88 Ocean > Arctic Ocean> PL94-AR BC16 > LATITUDE 80.33 > LONGITUDE -178.72 Ocean > Arctic Ocean> PL94-AR BC26 > LATITUDE 88.8 > LONGITUDE 143.48 Ocean > Arctic Ocean> PL94-AR BC28 > LATITUDE 88.87 > LONGITUDE 140.18 Ocean > Arctic Ocean> PL94-AR BC17 > LATITUDE 81.27 > LONGITUDE 178.87 Ocean > Arctic Ocean> PL94-AR BC32 > LATITUDE 85.72 > LONGITUDE 37.75 place otherRestrictions Cite as: Hoffmann, S.S.; McManus, J.F.; Curry, W.B.; Brown-Leger, S. (2014-07-10): NOAA/WDS Paleoclimatology - Central Arctic Sedimentary 231Pa/230Th Ratios from the Past 35,000 Years. [indicate subset used]. NOAA National Centers for Environmental Information. https://www.ncdc.noaa.gov/paleo/study/16914. 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. Persistent export of 231Pa from the deep central Arctic Ocean over the past 35,000 years 2013 publication Hoffmann, S.S., J.F. McManus, W.B. Curry, and L.S. Brown-Leger author Nature publisher https://doi.org/10.1038/nature12145 HTTPS Web Browser Associated Reference published 2013 Hoffmann, S.S., J.F. McManus, W.B. Curry, and L.S. Brown-Leger, 2013: Persistent export of 231Pa from the deep central Arctic Ocean over the past 35,000 years. Nature, 497, 603-606, 10.1038/nature12145 information crossReference sciencePaper eng; USA geoscientificInformation Date Range: 45920 cal yr BP to 1590 cal yr BP; -178.72 178.87 78.13 88.87 -43970 360 STUDY NOTES: U-series radionuclide records from seven Arctic sediment cores, with excess 231Pa/230Th ratios interpreted as indicators of 231Pa export in the water column. Age models are from calibrated radiocarbon measurements on polar foraminifer species N. pachyderma (sinistral). ABSTRACT SUPPLIED BY ORIGINATOR: The Arctic Ocean has an important role in Earth’s climate, both through surface processes such as sea-ice formation and transport, and through the production and export of waters at depth that contribute to the global thermohaline circulation. Deciphering the deep Arctic Ocean’s palaeo-oceanographic history is a crucial part of understanding its role in climatic change. Here we show that sedimentary ratios of the radionuclides thorium-230 (230Th) and protactinium-231 (231Pa), which are produced in sea water and removed by particle scavenging on timescales of decades to centuries, respectively, record consistent evidence for the export of 231Pa from the deep Arctic and may indicate continuous deepwater exchange between the Arctic and Atlantic oceans throughout the past 35,000 years. Seven well-dated box-core records provide a comprehensive overview of 231Pa and 230Th burial in Arctic sediments during glacial, deglacial and interglacial conditions. Sedimentary 231Pa/230Th ratios decrease nearly linearly with increasing water depth above the core sites, indicating efficient particle scavenging in the upper water column and greater influence of removal by lateral transport at depth. Although the measured 230Th burial is in balance with its production in Arctic sea water, integrated depth profiles for all time intervals reveal a deficit in 231Pa burial that can be balanced only by lateral export in the water column. Because no enhanced sink for 231Pa has yet been found in the Arctic, our records suggest that deep-water exchange through the Fram strait may export 231Pa. Such export may have continued for the past 35,000 years, suggesting a century-scale replacement time for deep waters in the Arctic Ocean since the most recent glaciation and a persistent contribution of Arctic waters to the global ocean circulation. 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Native Format(s) https://data.nodc.noaa.gov/cgi-bin/iso?id=noaa-ocean-16914 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/16914 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/hoffmann2013/hoffmann2013-bc20.txt HTTPS Download /contributions_by_author/hoffmann2013/hoffmann2013-bc20.txt Original Data and Full Metadata download https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hoffmann2013/hoffmann2013-bc17.txt HTTPS Download /contributions_by_author/hoffmann2013/hoffmann2013-bc17.txt Original Data and Full Metadata download https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hoffmann2013/hoffmann2013-bc08.txt HTTPS Download /contributions_by_author/hoffmann2013/hoffmann2013-bc08.txt Original Data and Full Metadata download https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hoffmann2013/hoffmann2013-bc16.txt HTTPS Download /contributions_by_author/hoffmann2013/hoffmann2013-bc16.txt Original Data and Full Metadata download https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hoffmann2013/hoffmann2013-bc32.txt HTTPS Download /contributions_by_author/hoffmann2013/hoffmann2013-bc32.txt Original Data and Full Metadata download https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hoffmann2013/hoffmann2013-bc28.txt HTTPS Download /contributions_by_author/hoffmann2013/hoffmann2013-bc28.txt Original Data and Full Metadata download https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hoffmann2013/hoffmann2013-bc26.txt HTTPS Download /contributions_by_author/hoffmann2013/hoffmann2013-bc26.txt Original Data and Full Metadata download asNeeded This metadata record was translated from DIF using dif-9x-to-iso-19115-2.xsl Version: 2018-10-25