noaa-ocean-12423 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 - Global Ocean Glacial Export Production Data 2012-01-27 publication noaa-ocean-12423 NCEI DSI 1200_01 Kohfeld, K.E. originator Kohfeld, K.E. author Le Quéré, C. originator Le Quéré, C. author Harrison, S.P. originator Harrison, S.P. author Anderson, R.F. originator Anderson, R.F. 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 (other) with a geographic location of Global. The time period coverage is from 100000 to 18000 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 > other 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 biogeochemical cycles theme Geographic Region > Global> Global > LATITUDE > LONGITUDE place otherRestrictions Cite as: Kohfeld, K.E.; Le Quéré, C.; Harrison, S.P.; Anderson, R.F. (2012-01-27): NOAA/WDS Paleoclimatology - Global Ocean Glacial Export Production Data . [indicate subset used]. NOAA National Centers for Environmental Information. https://www.ncdc.noaa.gov/paleo/study/12423. 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. eng; USA geoscientificInformation Date Range: 100000 cal yr BP to 18000 cal yr BP; -180 180 -90 90 -98050 -16050 STUDY NOTES: Tables and Table Notes Table S1. Change in export production at the LGM relative to Late Holocene. Table S2. Change in export production at the LGM relative to Stage 5a-d. Table S3. Change in export production at Stage 5a-d relative to Late Holocene. Table Notes Dating Control: d18O = oxygen isotope stratigraphy; 14C = radiocarbon dating of single species of foraminifera; LC = lithogenic correlation. CFP = Constant Flux Proxy. “Y” indicates that accumulation rates were corrected for sediment focusing using 230Th normalization. Data Evaluation: Data for each core were given scores for each of the three categories: (a) the quality of sediment age models, (b) the means by which sediment flux measurements are determined, and (c) the number and agreement between the indicators within a core. The four different types of age models were scored as follows: AMS radiocarbon dating = 4; marine isotope stratigraphy = 3; bulk radiocarbon or 230Th methods = 2; and lithogenic correlation = 1. Sediment flux measurements that used a ‘constant flux proxy’ such as 230Th normalization were given the highest score of 4. Sediment sites with mass accumulation rates that did not use 230Th normalization received a score of 2. Sites where only concentrations were determined received a score of 1. Finally, number of proxies measured in each core multiplied by the fraction of agreement between these proxies determined the third score. The final score (the sum of the score for the three categories) determined whether the data from that core received a confidence ranking of “high” (scores 10-14), “intermediate” (scores 7-10), or “low” (scores 6 or below). Assessed Change in Productivity and Productivity Indicators: Changes represent conditions at the LGM relative to today: -1 = decrease; -0.5 = slight decrease; 0 = no change; +0.5 = slight increase; 1 = increase; 99 = no assessment possible. All changes are based on accumulation rates unless otherwise indicated (in comments, or as a code of “1” in the “flux code” column). ABSTRACT SUPPLIED BY ORIGINATOR: It has been hypothesized that changes in the marine biological pump caused a major portion of the glacial reduction of atmospheric carbon dioxide by 80 to 100 parts per million through increased iron fertilization of marine plankton, increased ocean nutrient content or utilization, or shifts in dominant plankton types. We analyze sedimentary records of marine productivity at the peak and the middle of the last glacial cycle and show that neither changes in nutrient utilization in the Southern Ocean nor shifts in plankton dominance explain the CO2 drawdown. Iron fertilization and associated mechanisms can be responsible for no more than half the observed drawdown. 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Native Format(s) https://data.nodc.noaa.gov/cgi-bin/iso?id=noaa-ocean-12423 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/12423 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/kohfeld2005/kohfeld2005.xls HTTPS Download /contributions_by_author/kohfeld2005/kohfeld2005.xls Original Data and Full Metadata download https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/kohfeld2005/kohfeld2005.txt HTTPS Download /contributions_by_author/kohfeld2005/kohfeld2005.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