{"NOAAStudyId":"5915","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":"2005-08-01","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-5915.xml","doi":null,"earliestYearBP":14840,"earliestYearCE":-12890,"entryId":"noaa-ocean-5915","funding":[],"investigators":"Barron, J.A.; Bukry, D.; Dean, W.E.","mostRecentYearBP":2200,"mostRecentYearCE":-250,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/5915","originalSource":null,"publication":[{"abstract":"High-resolution records of calcium carbonate, biogenic opal, diatoms, and silicoflagellates from western Guaymas Basin gravity core GGC55 and piston core JPC56 and eastern Guaymas Basin DSDP Site 480 reveal a complex paleoceanographic history of the central Gulf of California during the past 15,000 years. Prior to ~6.2 ka, the eastern and western Guaymas Basin proxy records were remarkably similar. After conditions similar to those of today during the Bolling-Allerod, the Younger Dryas (YD) saw a major drop in diatom production, coincident with increased calcium carbonate and tropical microfossils suggestive of El Nino-like conditions. Biosiliceous productivity began increasing during the latter part of the YD, but it was only during the earliest Holocene (11.6 to 11.0 ka) that conditions similar to those of the Bolling-Allerod returned to the central Gulf. Between around 11.0 and 6.2 ka, tropical diatoms and silicoflagellates were virtually absent from the central Gulf, as relatively cooler and fresher surface waters resembling those of the modern northern Gulf were present in the central Gulf. Beginning at about 6.2 ka, tropical diatoms and silicoflagellates began increasing in the central Gulf, and coccoliths returned to western Gulf sediments. The onset of modern-day monsoon conditions in the American Southwest required the presence of warm SSTs in the northern Gulf, which probably did not occur until after about 5.4 ka, when tropical diatoms and silicoflagellates became relatively common in the central Gulf. Modern east-west contrasts, which arise from late winter-early spring coastal upwelling on the mainland side and lower diatom productivity on the western side of the Gulf, commenced between 6.2 and 5.4 ka, possibly due to a shift in the direction of late winter-early spring winds more towards the southeast, or down the axis of the Gulf. This proposed wind shift might have ultimately been due to a late Holocene strengthening of ENSO-like conditions in the eastern equatorial Pacific.","author":{"name":"John A. Barron, David Bukry, Walter E. Dean"},"citation":"John A. Barron, David Bukry, Walter E. Dean. 2005. Paleoceanographic history of the Guaymas Basin, Gulf of California, during the past 15,000 years based on diatoms, silicoflagellates, and biogenic sediments. Marine Micropaleontology, 56(3-4), 81-102. doi: 10.1016/j.marmicro.2005.04.001","edition":null,"identifier":{"id":"10.1016/j.marmicro.2005.04.001","type":"doi","url":"http://dx.doi.org/10.1016/j.marmicro.2005.04.001"},"issue":"3-4","journal":"Marine Micropaleontology","pages":"81-102","pubRank":"1","pubYear":2005,"reportNumber":null,"title":"Paleoceanographic history of the Guaymas Basin, Gulf of California, during the past 15,000 years based on diatoms, silicoflagellates, and biogenic sediments","type":"publication","volume":"56"},{"abstract":null,"author":{"name":"Walter E. Dean"},"citation":"Walter E. Dean. 2006. The geochemical record of the last 17,000 years in the Guaymas Basin, Gulf of California. Chemical Geology, 232(3-4), 87-98. doi: 10.1016/j.chemgeo.2006.02.017","edition":null,"identifier":{"id":"10.1016/j.chemgeo.2006.02.017","type":"doi","url":"http://dx.doi.org/10.1016/j.chemgeo.2006.02.017"},"issue":"3-4","journal":"Chemical Geology","pages":"87-98","pubRank":"3","pubYear":2006,"reportNumber":null,"title":"The geochemical record of the last 17,000 years in the Guaymas Basin, Gulf of California","type":"publication","volume":"232"},{"abstract":null,"author":{"name":"Lloyd D. Keigwin"},"citation":"Lloyd D. Keigwin. 2002. Late Pleistocene-Holocene Paleoceanography and Ventilation of the Gulf of California. Journal of Oceanography, 58(2), 421-432. doi: 10.1023/A:1015830313175","edition":null,"identifier":{"id":"10.1023/A:1015830313175","type":"doi","url":"http://dx.doi.org/10.1023/A:1015830313175"},"issue":"2","journal":"Journal of Oceanography","pages":"421-432","pubRank":"2","pubYear":2002,"reportNumber":null,"title":"Late Pleistocene-Holocene Paleoceanography and Ventilation of the Gulf of California","type":"publication","volume":"58"}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"19220","geo":{"geoType":"Feature","geometry":{"coordinates":["27.47","-112.1"],"type":"POINT"},"properties":{"easternmostLongitude":"-112.1","maxElevationMeters":"-820","minElevationMeters":"-820","northernmostLatitude":"27.47","southernmostLatitude":"27.47","westernmostLongitude":"-112.1"}},"locationName":"Ocean>Pacific Ocean>North Pacific Ocean","mappable":"Y","paleoData":[{"NOAADataTableId":"26021","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>population abundance"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/barron2005/barron2005.txt","linkText":"barron2005.txt","urlDescription":"Original Data and Full Metadata","variables":[]}],"dataTableName":"Barron2005census","dataTableNotes":null,"earliestYear":14840,"earliestYearBP":14840,"earliestYearCE":-12890,"mostRecentYear":2200,"mostRecentYearBP":2200,"mostRecentYearCE":-250,"species":[],"timeUnit":"cal yr BP"}],"siteName":"GGC55"}],"studyCode":null,"studyName":"Barron et al. 2005 High Resolution Guaymas Basin Diatom and Silicoflagellate Data","studyNotes":"Guaymas Basin High-resolution Diatom and Silicoflagellate Data.\nSamples are from piston core JC56 and nearby gravity core GGC-55 \n(27 28.22'N, 112 6.33'W; 820 m water depth) \n\nThe chronology for GGC55 and JPC56 is after Keigwin (2002), who recalibrated \nthe results of Pride et al. (1999) using the revised reservoir correction of \n725 years (BR =395 years) for the central Gulf.","version":"1.0","xmlId":"2921"}