{"NOAAStudyId":"10514","contactInfo":{"address":"325 Broadway, E/NE31","city":"Boulder","constraints":"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.","country":"USA","dataCenterUrl":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data","email":"paleo@noaa.gov","fax":"303-497-6513","longName":"National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce ","phone":"303-497-6280","postalCode":"80305-3328","shortName":"DOC/NOAA/NESDIS/NCEI","state":"CO","type":"CONTACT INFORMATION"},"contributionDate":"2011-01-29","dataPublisher":"NOAA","dataType":"PALEOCEANOGRAPHY","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/paleoceanography","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-ocean-10514.xml","doi":null,"earliestYearBP":8637,"earliestYearCE":-6687,"entryId":"noaa-ocean-10514","funding":[{"fundingAgency":"Natural Sciences and Engineering Research Council of Canada","fundingGrant":"IPY, Discovery"},{"fundingAgency":"Canadian Foundation for Innovation","fundingGrant":null},{"fundingAgency":"US National Science Foundation","fundingGrant":"OPP-0612365"},{"fundingAgency":"Polar Climate  Stability Network","fundingGrant":null}],"investigators":"Lisé-Pronovost, A.; St-Onge, G.; Brachfeld, S.; Barletta, F.; Darby, D.","mostRecentYearBP":136,"mostRecentYearCE":1814,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/10514","originalSource":null,"publication":[{"abstract":"Two long Holocene piston cores (HLY0501-06JPC and -08JPC; \nherein after referred to as 6JPC and 8JPC) were raised from \nhigh sediment accumulation areas in the Arctic Alaskan margin \nin order to reconstruct the millennial- to centennial-scale \nbehavior of Earth's magnetic field and to better constrain \nthe regional chronostratigraphy of the Western Arctic. \nPaleomagnetic analyses using a u-channel cryogenic magnetometer \n(natural, anhysteretic and isothermal remanent magnetizations: \nNRM, ARM and IRM) and a vibrating sample magnetometer indicate \nthat a strong and stable single component characteristic remanent \nmagnetization carried by low coercivity pseudo-single domain (PSD) \ngrains such as magnetite can be isolated in the postglacial unit \nof both cores, where the inclination values vary around the \ngeocentric axial dipole (GAD) for the latitude of the coring \nsites and where the maximum angular deviation (MAD) values are \ngenerally lower than 5°. Apart from one interval in each core, \nall the derived relative paleointensity proxies (NRM/kLF, NRM/ARM \nand NRM/IRM) yield similar results. NRM/IRM was used as the \npreferred proxy because, based on cross-spectral analysis, \nit is not coherent with its normalizer. Based on the comparison \nwith paleomagnetic records from Western North America, \nthe paleomagnetic and physical analyses indicate that both \nsedimentary sequences have recorded some of the first reliable \nArctic high-resolution records of paleomagnetic secular variation \n(inclination and declination) and relative paleointensity during \nthe Holocene. In addition, full vector paleomagnetic correlations \n(inclination, declination and relative paleointensity) were used \nto constrain the chronology of core 6JPC, using core 8JPC and \nother previously published and independently dated sedimentary \nand volcanic records from Western North America. The Accelerator \nMass Spectroscopy (AMS) radiocarbon-based postglacial chronology \nof core 8JPC indicates sedimentation rates higher than 300 cm/kyr \non the continental shelf near Barrow Canyon from approximately \n8000 to 5000 cal BP, followed by a major decrease in sediment \ndeposition. In contrast, the postglacial deposition on the slope \nat core site 6JPC is relatively constant and sedimentation rates \nare nearly three times lower. \n\n","author":null,"citation":"Lisé-Pronovost, A., G. St-Onge, S. Brachfeld, F. Barletta, \nand D. Darby. 2009. \nPaleomagnetic constraints on the Holocene stratigraphy \nof the Arctic Alaskan margin. \nGlobal and Planetary Change, Vol. 68, Issues 1-2, pp. 85-99, \nJuly 2009.  doi:10.1016/j.gloplacha.2009.03.015 \n","edition":null,"identifier":{"id":"10.1016/j.gloplacha.2009.03.015 ","type":"doi","url":"http://dx.doi.org/10.1016/j.gloplacha.2009.03.015 "},"issue":null,"journal":"Global and Planetary Change","pages":null,"pubRank":"1","pubYear":2010,"reportNumber":null,"title":"Paleomagnetic constraints on the Holocene stratigraphy  of the Arctic Alaskan margin","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":["sea ice"],"site":[{"NOAASiteId":"37165","geo":{"geoType":"Feature","geometry":{"coordinates":["72.69","-157.03"],"type":"POINT"},"properties":{"easternmostLongitude":"-157.03","maxElevationMeters":"-673","minElevationMeters":"-673","northernmostLatitude":"72.69","southernmostLatitude":"72.69","westernmostLongitude":"-157.03"}},"locationName":"Ocean>Arctic Ocean>Beaufort Sea","mappable":"Y","paleoData":[{"NOAADataTableId":"19312","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>magnetic susceptibility"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lise-pronovost2009/lise-pronovost2009.txt","linkText":"lise-pronovost2009.txt","urlDescription":"Original Data and Full Metadata","variables":[]},{"NOAAKeywords":["earth science>paleoclimate>paleocean>magnetic susceptibility"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lise-pronovost2009/lise-pronovost2009.xls","linkText":"lise-pronovost2009.xls","urlDescription":"Original Data and Full Metadata","variables":[]}],"dataTableName":"HLY05-01 JPC6","dataTableNotes":null,"earliestYear":8637,"earliestYearBP":8637,"earliestYearCE":-6687,"mostRecentYear":136,"mostRecentYearBP":136,"mostRecentYearCE":1814,"species":[],"timeUnit":"cal yr BP"}],"siteName":"HLY05-01 JPC6"},{"NOAASiteId":"37166","geo":{"geoType":"Feature","geometry":{"coordinates":["71.63","-156.86"],"type":"POINT"},"properties":{"easternmostLongitude":"-156.86","maxElevationMeters":"-90","minElevationMeters":"-90","northernmostLatitude":"71.63","southernmostLatitude":"71.63","westernmostLongitude":"-156.86"}},"locationName":"Ocean>Arctic Ocean>Beaufort Sea","mappable":"Y","paleoData":[{"NOAADataTableId":"19313","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>magnetic susceptibility"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lise-pronovost2009/lise-pronovost2009.txt","linkText":"lise-pronovost2009.txt","urlDescription":"Original Data and Full Metadata","variables":[]},{"NOAAKeywords":["earth science>paleoclimate>paleocean>magnetic susceptibility"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lise-pronovost2009/lise-pronovost2009.xls","linkText":"lise-pronovost2009.xls","urlDescription":"Original Data and Full Metadata","variables":[]}],"dataTableName":"HLY05-01 JPC8","dataTableNotes":null,"earliestYear":7963,"earliestYearBP":7963,"earliestYearCE":-6013,"mostRecentYear":1778,"mostRecentYearBP":1778,"mostRecentYearCE":172,"species":[],"timeUnit":"cal yr BP"}],"siteName":"HLY05-01 JPC8"}],"studyCode":null,"studyName":"Arctic Alaskan Margin Holocene Geomagnetic Data","studyNotes":"The dataset consists of paleomagnetic and rock magnetic parameters \nfrom Holocene sediment cores from the western Alaska margin. \nThe paleomagnetic data are used as one component of a Holocene \nage model for the Chukchi Sea. The rock magnetic parameters are \nsensitive to sea ice cover, paleoproductivity, and post depositional \ndiagenesis in the Chukchi-Alaska margin. The parameters include \nnatural remanent magnetization (NRM), geomagnetic inclination \nand declination determined from principal component analysis, \nanhysteretic remanent magnetization (ARM), isothermal remanent \nmagnetization, magnetic susceptibility, wet bulk density, S-ratio, \nmedian destruction field of the natural remanent magnetization \n(MDF-NRM), and ratios constructed from these parameters. \nMagnetic susceptibility and bulk density were measured on a \nGeotek multisensor track. NRM, ARM, IRM, and SIRM were measured \non a 2G model 755 cyrogenic magnetometer at the Institut des \nSciences de la Mer (ISMER) at the Université du Québec at \nRimouski, Canada. \n\nCores HLY05-01 JPC6 and HLY05-01 JPC8 were collected during \ncruise 05-01 of the U.S. Coast Guard Cutter Healy (Healy-Oden \nTrans-Arctic Expedition \"HOTRAX\" Leg 1). \n\nCorrelation of physical properties datasets between the \njumbo piston core (JPC6) and its companion trigger core (TC) \nwas used to determine the amount of section lost at the top \nof the piston core. Lisé-Pronovst et al., 2009 favor a 80cm \nadjustment of the JPC depth scale. Ortiz et al., 2009 favor \na 147cm adjustment. Both adjustments and resulting age models \nare presented here. \n\nCorrelation of physical properties datasets between the \njumbo piston core (JPC8) and its companion trigger core (TC) \nwas used to determine the amount of section lost at the top \nof the piston core. The depth adjustment is 51 cm. \n","version":"1.0","xmlId":"9178"}