noaa-ocean-16397 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 - North African Dust Deposition Fluxes Over the last 20,000 years 2014-04-29 publication noaa-ocean-16397 NCEI DSI 1200_01 McGee, D. originator McGee, D. author deMenocal, P.B. originator deMenocal, P.B. author Winckler, G. originator Winckler, G. author Stuut, J.-B.W. originator Stuut, J.-B.W. author Bradtmiller, L.I. originator Bradtmiller, L.I. 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 North Atlantic Ocean. The time period coverage is from 21933 to 358 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 > paleocean > radiogenic isotope earth science > paleoclimate > paleocean > physical properties 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 > Atlantic Ocean > North Atlantic Ocean> OCE437-07-GC68 > LATITUDE 19.363 > LONGITUDE -17.282333 Ocean > Atlantic Ocean > North Atlantic Ocean> OCE437-07-GC27 > LATITUDE 30.879833 > LONGITUDE -10.629833 Ocean > Atlantic Ocean > North Atlantic Ocean> OCE437-07-GC49 > LATITUDE 23.206167 > LONGITUDE -17.854167 Ocean > Atlantic Ocean > North Atlantic Ocean> OCE437-07-GC37 > LATITUDE 26.81595 > LONGITUDE -15.117717 Ocean > Atlantic Ocean > North Atlantic Ocean> OCE437-07-GC66 > LATITUDE 19.944 > LONGITUDE -17.860217 place otherRestrictions Cite as: McGee, D.; deMenocal, P.B.; Winckler, G.; Stuut, J.-B.W.; Bradtmiller, L.I. (2014-04-29): NOAA/WDS Paleoclimatology - North African Dust Deposition Fluxes Over the last 20,000 years. [indicate subset used]. NOAA National Centers for Environmental Information. https://www.ncdc.noaa.gov/paleo/study/16397. 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. The magnitude, timing and abruptness of changes in North African dust deposition over the last 20,000 yr 2013 publication McGee, D., P.B. deMenocal, G. Winckler, J.B.W. Stuut and L.I. Bradtmiller author Earth and Planetary Science Letters publisher https://doi.org/10.1016/j.epsl.2013.03.054 HTTPS Web Browser Associated Reference published 2013 McGee, D., P.B. deMenocal, G. Winckler, J.B.W. Stuut and L.I. Bradtmiller, 2013: The magnitude, timing and abruptness of changes in North African dust deposition over the last 20,000 yr. Earth and Planetary Science Letters, 371-372, 163-176, 10.1016/j.epsl.2013.03.054 information crossReference sciencePaper eng; USA geoscientificInformation Date Range: 21933 cal yr BP to 358 cal yr BP; -17.860217 -10.629833 19.363 30.879833 -19983 1592 STUDY NOTES: Ages determined by P_Sequence routine in Oxcal 4.2. Uncertainties on sediment flux are dominated by correction for detrital 230Th. Dust fraction is sum of variables EM2 and EM1 contributions to detrital fraction. Dust flux calculated as sediment flux*detrital%*dust fraction. ABSTRACT SUPPLIED BY ORIGINATOR: Reconstructions of eolian dust accumulation in northwest African margin sediments provide important continuous records of past changes in atmospheric circulation and aridity in the region. Existing records indicate dramatic changes in North African dust emissions over the last 20 ka, but the limited spatial extent of these records and the lack of high-resolution flux data do not allow us to determine whether changes in dust deposition occurred with similar timing, magnitude and abruptness throughout northwest Africa. Here we present new records from a meridional transect of cores stretching from 31°N to 19°N along the northwest African margin. By combining grain size endmember modeling with 230Th-normalized fluxes for the first time, we are able to document spatial and temporal changes in dust deposition under the North African dust plume throughout the last 20 ka. Our results provide quantitative estimates of the magnitude of dust flux changes associated with Heinrich Stadial 1, the Younger Dryas, and the African Humid Period (AHP; ~11.7-5 ka), offering robust targets for model-based estimates of the climatic and biogeochemical impacts of past changes in North African dust emissions. Our data suggest that dust fluxes between 8-6 ka were a factor of ~5 lower than average fluxes during the last 2 ka. Using a simple model to estimate the effects of bioturbation on dust input signals, we find that our data are consistent with abrupt, synchronous changes in dust fluxes in all cores at the beginning and end of the AHP. The mean ages of these transitions are 11.8 ± 0.2 ka (1s) and 4.9 ± 0.2 ka, respectively. 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Native Format(s) https://data.nodc.noaa.gov/cgi-bin/iso?id=noaa-ocean-16397 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/16397 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/mcgee2013/mcgee2013-gc27-grain.txt HTTPS Download /contributions_by_author/mcgee2013/mcgee2013-gc27-grain.txt Original Data and Full Metadata download https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mcgee2013/mcgee2013-gc68-flux.txt HTTPS Download /contributions_by_author/mcgee2013/mcgee2013-gc68-flux.txt Original Data and Full Metadata download https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mcgee2013/mcgee2013-gc68-grain.txt HTTPS Download /contributions_by_author/mcgee2013/mcgee2013-gc68-grain.txt Original Data and Full Metadata download https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mcgee2013/mcgee2013-gc37-flux.txt HTTPS Download /contributions_by_author/mcgee2013/mcgee2013-gc37-flux.txt Original Data and Full Metadata download https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mcgee2013/mcgee2013-gc37-grain.txt HTTPS Download /contributions_by_author/mcgee2013/mcgee2013-gc37-grain.txt Original Data and Full Metadata download https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mcgee2013/mcgee2013-gc66-grain.txt HTTPS Download /contributions_by_author/mcgee2013/mcgee2013-gc66-grain.txt Original Data and Full Metadata download https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mcgee2013/mcgee2013-gc27-flux.txt HTTPS Download /contributions_by_author/mcgee2013/mcgee2013-gc27-flux.txt Original Data and Full Metadata download https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mcgee2013/mcgee2013-gc49-grain.txt HTTPS Download /contributions_by_author/mcgee2013/mcgee2013-gc49-grain.txt Original Data and Full Metadata download https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mcgee2013/mcgee2013-gc49-flux.txt HTTPS Download /contributions_by_author/mcgee2013/mcgee2013-gc49-flux.txt Original Data and Full Metadata download https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mcgee2013/mcgee2013-gc66-flux.txt HTTPS Download /contributions_by_author/mcgee2013/mcgee2013-gc66-flux.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