{"NOAAStudyId":"15326","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":"2013-10-30","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-15326.xml","doi":null,"earliestYearBP":25340,"earliestYearCE":-23390,"entryId":"noaa-ocean-15326","funding":[{"fundingAgency":"National Science Foundation","fundingGrant":"OCE-0851056"}],"investigators":"Singh, A.; Marcantonio, F.; Lyle, M.","mostRecentYearBP":857,"mostRecentYearCE":1093,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/15326","originalSource":null,"publication":[{"abstract":"Age-model derived sediment mass accumulation rates (MARs) are consistently higher than 230Th-normalized MARs in the Equatorial Pacific Ocean during the past 25 ka. The offset, being highest in the Panama Basin, suggests a significant role for deep-sea sediment redistribution (i.e., sediment focusing) in this region. Here, we test the hypothesis that downslope transport of sediments from topographically high regions that surround the Panama Basin is the cause of higher-than-expected xs230Th inventories over the past 25 ka in the deeper parts of the basin. We find little difference in xs230Th inventories between the highest and lowest reaches of the basin. Furthermore, there is no correlation between xs230Th-derived sediment focusing factors and water depth which suggests that the topographic highs do not serve as a source of xs230Th. A spatial analysis suggests that there may be an enhanced scavenging effect on xs230Th concentrations in sediment closest to the equator whe! re productivity is the highest, although further data is necessary to corroborate this. At the equator xs230Th-derived focusing factors are high and range from about 1 to 5 during the Holocene and about 1 to 11 during the last glacial. In contrast, non-equatorial cores show a smaller range in variability from about 0.7 to 2.8 during the Holocene and from 0.7 to 3.6 during the last glacial. Based on 232Th flux measurements, we hypothesize that the location at which eolian detrital fluxes surpass the riverine detrital fluxes is approximately 300 km from the margin. While riverine fluxes from coastal margins were higher during the Holocene, eolian fluxes were higher during the last glacial.","author":{"name":"Singh, A., F. Marcantonio and M. Lyle"},"citation":"Singh, A., F. Marcantonio and M. Lyle. 2011. Sediment focusing in the Panama Basin, Eastern Equatorial Pacific Ocean. Earth and Planetary Science Letters, 309, 33-44. ","edition":null,"identifier":null,"issue":null,"journal":"Earth and Planetary Science Letters","pages":"33-44","pubRank":"1","pubYear":2011,"reportNumber":null,"title":"Sediment focusing in the Panama Basin, Eastern Equatorial Pacific Ocean","type":"publication","volume":"309"}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"17945","geo":{"geoType":"Feature","geometry":{"coordinates":["-.47","-82.07"],"type":"POINT"},"properties":{"easternmostLongitude":"-82.07","maxElevationMeters":"-1373","minElevationMeters":"-1373","northernmostLatitude":"-0.47","southernmostLatitude":"-0.47","westernmostLongitude":"-82.07"}},"locationName":"Ocean>Pacific Ocean>South Pacific Ocean","mappable":"Y","paleoData":[{"NOAADataTableId":"25295","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>radiogenic 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planktonic radiocarbon dates (N. dutertrei: Koutavas and Lynch-Stieglitz, 2003).","earliestYear":22000,"earliestYearBP":22000,"earliestYearCE":-20050,"mostRecentYear":4500,"mostRecentYearBP":4500,"mostRecentYearCE":-2550,"species":[],"timeUnit":"cal yr BP"}],"siteName":"V19-27"},{"NOAASiteId":"18297","geo":{"geoType":"Feature","geometry":{"coordinates":["-1.42","-86.85"],"type":"POINT"},"properties":{"easternmostLongitude":"-86.85","maxElevationMeters":"-2180","minElevationMeters":"-2180","northernmostLatitude":"-1.42","southernmostLatitude":"-1.42","westernmostLongitude":"-86.85"}},"locationName":"Ocean>Pacific Ocean>Eastern Pacific Ocean","mappable":"Y","paleoData":[{"NOAADataTableId":"25296","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>radiogenic isotope"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/singh2011/singh2011-rc8-102.txt","linkText":"singh2011-rc8-102.txt","urlDescription":"Original Data and 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2003).","earliestYear":23800,"earliestYearBP":23800,"earliestYearCE":-21850,"mostRecentYear":4900,"mostRecentYearBP":4900,"mostRecentYearCE":-2950,"species":[],"timeUnit":"cal yr BP"}],"siteName":"RC8-102"},{"NOAASiteId":"18562","geo":{"geoType":"Feature","geometry":{"coordinates":[".95","-89.35"],"type":"POINT"},"properties":{"easternmostLongitude":"-89.35","maxElevationMeters":"-712","minElevationMeters":"-712","northernmostLatitude":"0.95","southernmostLatitude":"0.95","westernmostLongitude":"-89.35"}},"locationName":"Ocean>Pacific Ocean>North Pacific Ocean","mappable":"Y","paleoData":[{"NOAADataTableId":"25298","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>radiogenic isotope"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/singh2011/singh2011-v21-29.txt","linkText":"singh2011-v21-29.txt","urlDescription":"Original Data and Full 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2003).","earliestYear":16808,"earliestYearBP":16808,"earliestYearCE":-14858,"mostRecentYear":3933,"mostRecentYearBP":3933,"mostRecentYearCE":-1983,"species":[],"timeUnit":"cal yr BP"}],"siteName":"V21-29"},{"NOAASiteId":"30619","geo":{"geoType":"Feature","geometry":{"coordinates":[".52","-92.4"],"type":"POINT"},"properties":{"easternmostLongitude":"-92.4","maxElevationMeters":"-2830","minElevationMeters":"-2830","northernmostLatitude":"0.52","southernmostLatitude":"0.52","westernmostLongitude":"-92.4"}},"locationName":"Ocean>Pacific Ocean>North Pacific Ocean","mappable":"Y","paleoData":[{"NOAADataTableId":"25300","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>radiogenic isotope"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/singh2011/singh2011-tr163-22.txt","linkText":"singh2011-tr163-22.txt","urlDescription":"Original Data and Full 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dutertrei.","earliestYear":18200,"earliestYearBP":18200,"earliestYearCE":-16250,"mostRecentYear":4000,"mostRecentYearBP":4000,"mostRecentYearCE":-2050,"species":[],"timeUnit":"cal yr BP"}],"siteName":"TR163-22"},{"NOAASiteId":"52403","geo":{"geoType":"Feature","geometry":{"coordinates":["7.85583","-83.60833"],"type":"POINT"},"properties":{"easternmostLongitude":"-83.60833","maxElevationMeters":"-1368","minElevationMeters":"-1368","northernmostLatitude":"7.85583","southernmostLatitude":"7.85583","westernmostLongitude":"-83.60833"}},"locationName":"Ocean>Pacific Ocean>Eastern Pacific Ocean","mappable":"Y","paleoData":[{"NOAADataTableId":"25301","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>radiogenic isotope"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/singh2011/singh2011-me0005A-43JC.txt","linkText":"singh2011-me0005A-43JC.txt","urlDescription":"Original Data and Full 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2006).","earliestYear":21920,"earliestYearBP":21920,"earliestYearCE":-19970,"mostRecentYear":857,"mostRecentYearBP":857,"mostRecentYearCE":1093,"species":[],"timeUnit":"cal yr BP"}],"siteName":"ME0005A-43JC"},{"NOAASiteId":"55654","geo":{"geoType":"Feature","geometry":{"coordinates":["6.4","-85.8"],"type":"POINT"},"properties":{"easternmostLongitude":"-85.8","maxElevationMeters":"-1950","minElevationMeters":"-1950","northernmostLatitude":"6.4","southernmostLatitude":"6.4","westernmostLongitude":"-85.8"}},"locationName":"Ocean>Pacific Ocean>Eastern Pacific Ocean","mappable":"Y","paleoData":[{"NOAADataTableId":"25299","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>radiogenic isotope"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/singh2011/singh2011-tr163-11.txt","linkText":"singh2011-tr163-11.txt","urlDescription":"Original Data and Full 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2003).","earliestYear":25340,"earliestYearBP":25340,"earliestYearCE":-23390,"mostRecentYear":4900,"mostRecentYearBP":4900,"mostRecentYearCE":-2950,"species":[],"timeUnit":"cal yr BP"}],"siteName":"TR163-11"}],"studyCode":null,"studyName":"Panama Basin Thorium and Uranium Sediment Data for the Last 25,000 Years","studyNotes":"Standard uranium series analysis by inductively-coupled plasma mass spectrometry was used.","version":"1.0","xmlId":"13109"}