{"NOAAStudyId":"14191","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":"2013-04-10","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-14191.xml","doi":null,"earliestYearBP":24000000,"earliestYearCE":-23998050,"entryId":"noaa-ocean-14191","funding":[{"fundingAgency":"US National Science Foundation","fundingGrant":"OCE-0725301, OCE-0962184"}],"investigators":"Piela, C.; Lyle, M.; Marcantonio, F.; Baldauf, J.; Olivarez Lyle, A.","mostRecentYearBP":12500000,"mostRecentYearCE":-12498050,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/14191","originalSource":null,"publication":[{"abstract":"The equatorial Pacific is an important part of the global carbon cycle \r\nand has been affected by climate change through the Cenozoic (65 Ma \r\nto present). We present a Miocene (12-24 Ma) biogenic sediment record \r\nfrom Deep Sea Drilling Project (DSDP) Site 574 and show that a CaCO3 \r\nminimum at 17 Ma was caused by elevated CaCO3 dissolution.  When Pacific \r\nPlate motion carried Site 574 under the equator at about 16.2 Ma, \r\nthere is a minor increase in biogenic deposition associated with passing \r\nunder the equatorial upwelling zone. The burial rates of the primary \r\nproductivity proxies biogenic silica (bio-SiO2) and biogenic barium (bio-Ba) \r\nincrease, but biogenic CaCO3 decreases. The carbonate minimum is at ~17 Ma \r\ncoincident with the beginning of the Miocene climate optimum; the transient \r\nlasts from 18 to 15 Ma. Bio-SiO2 and bio-Ba are positively correlated \r\nand increase as the equator was approached. Corg is poorly preserved, \r\nand is strongly affected by changing carbonate burial. Terrestrial 232Th \r\ndeposition, a proxy for aeolian dust, increases only after the Site 574 \r\nequator crossing. Since surface production of bio-SiO2, bio-Ba, and CaCO3 \r\ncorrelate in the modern equatorial Pacific, the decreased CaCO3 burial rate \r\nduring the Site 574 equator crossing is driven by elevated CaCO3 dissolution, \r\nrepresenting elevated ocean carbon storage and elevated atmospheric CO2.\r\nThe length of the 17 Ma CaCO3 dissolution transient requires interaction \r\nwith a 'slow' part of the carbon cycle, perhaps elevated mantle degassing \r\nassociated with the early stages of Columbia River Basalt emplacement.","author":null,"citation":"Piela, C., M. Lyle, F. Marcantonio, J. Baldauf, and A. Olivarez Lyle. 2012. \r\nBiogenic sedimentation in the equatorial Pacific: Carbon cycling and \r\npaleoproduction, 12-24 Ma.  \r\nPaleoceanography, 27, PA2204, doi:10.1029/2011PA002236","edition":null,"identifier":{"id":"10.1029/2011PA002236","type":"doi","url":"http://dx.doi.org/10.1029/2011PA002236"},"issue":null,"journal":"Paleoceanography","pages":null,"pubRank":"1","pubYear":2012,"reportNumber":null,"title":"Biogenic sedimentation in the equatorial Pacific: Carbon cycling and  paleoproduction, 12-24 Ma","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":["biogeochemical cycles"],"site":[{"NOAASiteId":"17952","geo":{"geoType":"Feature","geometry":{"coordinates":["4.22","-133.33"],"type":"POINT"},"properties":{"easternmostLongitude":"-133.33","maxElevationMeters":"-4561","minElevationMeters":"-4561","northernmostLatitude":"4.22","southernmostLatitude":"4.22","westernmostLongitude":"-133.33"}},"locationName":"Ocean>Pacific Ocean>North Pacific 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Data include CaCO3, C-org, bio-Sio2, Ba, U, \nand Th data from Piela et al 2012. CaCO3 and C-org were measured \nwith coulometer, bio-SiO2 by digestion and molybdate blue method, \nBa-U-Th by ICP-MS on a total sediment digestion. ","version":"1.0","xmlId":"12192"}