noaa-ocean-14169 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 - Healy-Oden Trans Arctic Expedition(HOTRAX) Grain Size, XRF, and Reflectance Data 2013-03-20 publication noaa-ocean-14169 NCEI DSI 1200_01 Ortiz, J.D. originator Ortiz, J.D. author Polyak, L. originator Polyak, L. author Darby, D. originator Darby, D. 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 (geochemistry) with a geographic location of Arctic Ocean. The time period coverage is from 8000 to 2000 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 > geochemistry 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 Arctic theme Ocean > Arctic Ocean> HLY05-01-07TC > LATITUDE 72.299326 > LONGITUDE -156.627917 Ocean > Arctic Ocean> HLY05-01-08TC > LATITUDE 71.628034 > LONGITUDE -156.859142 Ocean > Arctic Ocean> HLY05-01-01TC > LATITUDE 72.905244 > LONGITUDE -158.42049 Ocean > Arctic Ocean> HLY05-03-06JPC > LATITUDE 78.2938 > LONGITUDE -176.98615 place otherRestrictions Cite as: Ortiz, J.D. ; Polyak, L.; Darby, D. (2013-03-20): NOAA/WDS Paleoclimatology - Healy-Oden Trans Arctic Expedition(HOTRAX) Grain Size, XRF, and Reflectance Data. [indicate subset used]. NOAA National Centers for Environmental Information. https://www.ncdc.noaa.gov/paleo/study/14169. 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. 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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: 8000 cal yr BP to 2000 cal yr BP; -176.98615 -156.627917 71.628034 78.2938 -6050 -50 STUDY NOTES: The Grainsize measurements were generated as follows: Dried sample measured with a Malvern Mastersizer 200 equipped with an MU Size fraction = <63um Samples were pre-sieved with a #18 screen mesh to prevent larger particles from becoming stuck in the instrument Sample were run in triplicate and averaged for each sample, with each measurement set to integrate for 5 minutes Irregular particle shape model Mie theory index of Refraction = quartz Opacity =1 Header information is as follows:expedition name and number core number, core device (TC = trigger core; PC = piston core), section number, depth in core in cm Thus the header for the HOTRAX Leg 1 expedition sample from Core 7PC section 1, 1 cm is as follows: HLY 0501 7JPC 1 1 The reflectance measurements were generated as follows: Dried sample measured with an ASD labspec Pro FR UV-VIS -NIR analyzer Size fraction = <63um sample integration = 250 spectra per measurement Sample size: >250 mg sediment wet filtered onto a 0.4 um GF/F filter, over dired at 60 deg C overnight Comparison of sample and blank values indicated that the sediment sample was sufficently thick to block absorption of reflectance fom the GF/F filter and thus required no blank correction Reflectance values are stored in files labeled by core name samples are identified by depth in core (columns) and wavelength (rows) The XRF elements measurements were generated as follows: Measurements were conducted at Ohio State University or Kent State University using the Kent State University Innov-X alpha series Handheld XRF scanner Measurements were conducted in soils mode with concentration determined by the default Compton scattering mode with a 60-90 second integration time merging standard and light element mode measurements All values are reported as ppm The reported values are the raw average value +/- 1 sigma. When the internal variability was greater than 3 sigma, the mean value is reported in the 1-sigma error column and flagged as below the limit of detection in the raw column. Values listed as "adjusted" include the best estimate of the <LOD values as the mean value in the adjusted column. The 1-sigma error is identical for these samples and is listed in the 1-sigma error column. The data was post-processed at Kent State to extract signal from theadjusted values using a varimax rotated, principle component analysis (VPCA). VPCA was used to extract the coherent part of all measurements from the data by partioning measurement from noise. Information on these methods are reported in the MS thesis by Siriwardana cited below. The values used as input for the VPCA are tabulated as adjusted values in the data table. Additional information about sample collection can be found from the data report, cruise website and thesis work by Chandawimal H.E.R. Siriwardana at KSU ABSTRACT SUPPLIED BY ORIGINATOR: Sediment clay and silt mineral assemblages provide an excellent means of assessing the provenance of fine-grained Arctic sediment especially when a unique mineral assemblage can be tied to specific source areas. The diffuse spectral reflectance (DSR) first derivative measurements and quantitative X-Ray Diffraction (qXRD) on a high-resolution sediment core from the continental slope north of Alaska constrain the sediment mineralogy. DSR results are augmented by measurements on several adjacent cores and compared to surface sediment samples from the northern Alaskan shelf and slope. Using Principal Component Analysis (PCA), we infer that the three leading DSR modes relate to mixtures of smectite + dolomite, illite + goethite, and chlorite + muscovite. This interpretation is consistent with the down core qXRD results. While the smectite + dolomite, and illite + goethite factors show increased variability down core, the chlorite + muscovite factor had highest positive loadings in the middle Holocene, between ca. 6.0 and 3.6 ka. Because the most likely source of the chlorite + muscovite suite in this vicinity lies in the North Pacific, we argue that the oscillations in chlorite + muscovite values likely reflect an increase in the inflow of Pacific water to the Arctic through the Bering Strait. The time interval of this event is associated in other parts of the globe with a non-linear response of the climate system to the decrease in insolation, which may be related to changes in water exchange between the Pacific and Arctic Ocean. 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Native Format(s) https://data.nodc.noaa.gov/cgi-bin/iso?id=noaa-ocean-14169 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/14169 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/paleocean/hotrax/hotrax2009hly05-01-07jpcgs.txt HTTP Download NCEI Direct Download Direct download links for dataset files. download https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/hotrax/KSU_HOTRAX_VNIR_reflectance.xls HTTP Download NCEI Direct Download Direct download links for dataset files. download https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/hotrax/hotrax2009hly05-01-08jpc7-12-refl.txt HTTP Download NCEI Direct Download Direct download links for dataset files. download https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/hotrax/KSU_HOTRAX_XRF_element.xlsx HTTP Download NCEI Direct Download Direct download links for dataset files. download https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/hotrax/hotrax2009hly05-01-07jpc-refl.txt HTTP Download NCEI Direct Download Direct download links for dataset files. download https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/hotrax/hotrax2009hly05-01-08tc-refl.txt HTTP Download NCEI Direct Download Direct download links for dataset files. download https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/hotrax/hotrax2009hly05-01-07tcgs.txt HTTP Download NCEI Direct Download Direct download links for dataset files. download https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/hotrax/hotrax2009hly05-01-07tc-refl.txt HTTP Download NCEI Direct Download Direct download links for dataset files. download https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/hotrax/KSU_HOTRAX_Malvern_Grainsize.xls HTTP Download NCEI Direct Download Direct download links for dataset files. download https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/hotrax/hotrax2009hly05-01-08jpc1-6-refl.txt HTTP Download NCEI Direct Download Direct download links for dataset files. download https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/hotrax/hotrax2009hly05-01-08jpcgs.txt HTTP Download NCEI Direct Download Direct download links for dataset files. download https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/hotrax/hotrax2009hly05-01-01tc-refl.txt HTTP Download NCEI Direct Download Direct download links for dataset files. download https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/hotrax/hotrax2009hly05-01-01jpcgs.txt HTTP Download NCEI Direct Download Direct download links for dataset files. download https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/hotrax/hotrax2009hly05-03xrf.txt HTTP Download NCEI Direct Download Direct download links for dataset files. download https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/hotrax/hotrax2009hly05-01-01tcgs.txt HTTP Download NCEI Direct Download Direct download links for dataset files. download https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/hotrax/hotrax2009hly05-01-08tcgs.txt HTTP Download NCEI Direct Download Direct download links for dataset files. download https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/hotrax/hotrax2009hly05-01-01jpc-refl.txt HTTP Download NCEI Direct Download Direct download links for dataset files. download asNeeded This metadata record was translated from DIF using dif-9x-to-iso-19115-2.xsl Version: 2018-10-25