{"NOAAStudyId":"10419","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":"2010-07-19","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-10419.xml","doi":null,"earliestYearBP":613570,"earliestYearCE":-611620,"entryId":"noaa-ocean-10419","funding":[{"fundingAgency":"US National Science Foundation","fundingGrant":"EAR-0722180, EAR-0450221"}],"investigators":"Lyle, M.; Heusser, L.E.; Ravelo, A.C.; Olivarez Lyle, A.; Andreasen, D.H.; Diffenbaugh, N.","mostRecentYearBP":2680,"mostRecentYearCE":-730,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/10419","originalSource":null,"publication":[{"abstract":"Coastal marine sediments contain mixtures of terrestrial and marine \r\npaleoclimate proxies that record how the coastal water cycle has \r\nbehaved over long time frames. We explore a 600-kyr marine record \r\nfrom ODP Site 1018, located due west of Santa Cruz, California, \r\nto identify coastal wet and dry periods, and to associate them \r\nwith oceanographic processes. Wet periods in central California, \r\nidentified by increased tree pollen relative to pollen from \r\ngrasslands and scrublands, are found on every major deglaciation \r\nin the last 600 kyr. Sea surface temperature (SST) data were collected \r\nfor the last 2 deglaciation.  Wet periods are associated with a rapid \r\nrise in SST off central California. SST gradients along the California \r\nmargin and changes in biogenic deposition show that wet periods in \r\ncentral California are associated with a weakening of the California \r\nCurrent and weakened coastal upwelling. High carbonate production \r\nsuggests that there was significant curl-of-windstress upwelling \r\noffshore. We propose that wet periods in Central California are \r\nassociated with a meteorological connection to the tropical Pacific \r\nand weakened southward flow in the California Current that shunted \r\ntemperate Pacific water northward into the Alaska gyre. We do not \r\nobserve evidence for a south-shifted westerly storm track at the \r\nlast glacial maximum but find that wet periods are diachronous \r\nalong the California margin. The wettest period around the Santa \r\nBarbara Basin peaked at 16 ka, preceding the wet peak in central \r\nand northern California by 4 kyr. \r\n","author":{"name":"Lyle, M., L. Heusser, C. Ravelo, A. Olivarez Lyle, D. Andreassen, and N. Diffenbaugh"},"citation":"\r\n","edition":null,"identifier":{"id":"10.1029/2009PA001836 ","type":"doi","url":"http://dx.doi.org/10.1029/2009PA001836 "},"issue":null,"journal":"Paleoceanography","pages":null,"pubRank":"1","pubYear":2010,"reportNumber":"PA4211","title":"The Pleistocene water cycle and eastern boundary current processes  along the California continental margin","type":"publication","volume":"25"}],"reconstruction":"N","scienceKeywords":["hydrology"],"site":[{"NOAASiteId":"37013","geo":{"geoType":"Feature","geometry":{"coordinates":["36.989","-123.276"],"type":"POINT"},"properties":{"easternmostLongitude":"-123.276","maxElevationMeters":"-2477","minElevationMeters":"-2477","northernmostLatitude":"36.989","southernmostLatitude":"36.989","westernmostLongitude":"-123.276"}},"locationName":"Ocean>Pacific Ocean>Eastern Pacific Ocean","mappable":"Y","paleoData":[{"NOAADataTableId":"19199","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>geochemistry"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lyle2010/lyle2010.txt","linkText":"lyle2010.txt","urlDescription":"Original Data and Full Metadata","variables":[]},{"NOAAKeywords":["earth science>paleoclimate>paleocean>geochemistry"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lyle2010/lyle2010.xls","linkText":"lyle2010.xls","urlDescription":"Original Data and Full Metadata","variables":[]}],"dataTableName":"ODP1018","dataTableNotes":null,"earliestYear":613570,"earliestYearBP":613570,"earliestYearCE":-611620,"mostRecentYear":2680,"mostRecentYearBP":2680,"mostRecentYearCE":-730,"species":[],"timeUnit":"cal yr BP"}],"siteName":"ODP1018"}],"studyCode":null,"studyName":"California Margin ODP1018 600KYr Multiproxy Data ","studyNotes":"Multiproxy data from ODP Site 1018 off the central California coast. \nData include stable isotopes, alkenone SST, carbon, biogenic silica, \nand terrestrial pollen data. \n\nTotal organic carbon and carbonate data were measured from \n0 to 114.6 mbsf (2.8 to 614 ka). Age model is from oxygen \nisotope stratigraphy using a spline age model developed \nusing Analyseries software (see Lyle et al. 2010). \nSediments were freeze-dried, a split was analyzed for \ntotal carbon, and a second split was acidified and analyzed \nfor organic carbon. The difference between total carbon and \norganic carbon was assigned to be inorganic carbon in CaCO3. \nCaCO3 was estimated by multiplying the inorganic carbon \nby 8.33, the CaCO3/C weight ratio. \n\nAlkenone sea surface temperature data were measured from \n0 to 31.9 mbsf (2.7 to 160 ka). Age model is from oxygen \nisotope stratigraphy using a spline age model developed \nusing Analyseries software (see Lyle et al. 2010). \nAlkenones were extracted from sediments using methylene \nchloride-methanol, analyzed via gas chromatography, \nand reported as SST using the Muller et al (1998) \ncalibration equation. \n\nOxygen isotopes for Site 1018 are reported in Andreasen \net al., [2000]. The >250-um-size fraction was sampled \nfor benthic foraminiferal species Cibicidoides wuellerstorfi, \nCibicidoides pachyderma, and Uvigerina spp. Most analyses \nwere conducted using one or two C. wuellerstorfi or three \nor four Uvigerina spp. tests.  However, the number of tests \nof C. wuellerstorfi analyzed ranged from shell fragments to \nfour specimens. Occasional analyses were done using species \nC. pachyderma when C.wuellerstorfi were scarce. \nAll values reported here are relative to VPDB. \n\nPollen data were obtained using standard processing procedures. \nKOH and HF digestion and acetolysis were preceded and succeeded \nby sieving through 7-mm nylon screening [Heusser and Stock, 1984]. \nAn exotic tracer (Lycopodium) was added prior to sieving to \ndetermine pollen concentration per gram of sediment. Taxonomic \nidentification of pollen was based on comparison with modern pollen \nreference collections from western North America, and pollen counts \nwere continued until at least 300 pollen grains were identified \nfrom each sample. \n\nBiogenic silica was measured by the method described in Anderson \nand Ravelo [2001]. Samples were freeze-dried, lightly ground, \nand sieved. Splits were extracted for biogenic Si by the Mortlock \nand Froelich [1989] extraction technique using Na2CO3 and \nanalyzed via an automated spectrophotometric flow injection \nanalysis system [Lachat QuickChem 8000]. \n\n","version":"1.0","xmlId":"9072"}