{"NOAAStudyId":"21270","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":"2017-01-07","dataPublisher":"NOAA","dataType":"TREE RING","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/tree-ring","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-tree-21270.xml","doi":"https://doi.org/10.25921/b952-4r74","earliestYearBP":-2,"earliestYearCE":1952,"entryId":"noaa-tree-21270","funding":[{"fundingAgency":"Australian Research Council  ","fundingGrant":"ARC DP120104320"},{"fundingAgency":"CNRS","fundingGrant":"LEFE-PATISO"},{"fundingAgency":"Argentinean Council of Research and Technology (CONICET)","fundingGrant":null}],"investigators":"Lavergne, A.; Daux, V.; Villalba, R.; Pierre, M.; Stievenard, M.; Srur, A.M.","mostRecentYearBP":-61,"mostRecentYearCE":2011,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/21270","originalSource":null,"publication":[{"abstract":"Very few studies of stable isotopes exist across the Andes in South America. This study is the first presenting annually resolved chronologies of both d18O and d13C in Nothofagus pumilio and Fitzroya cupressoides trees from Northern Patagonia. Interannual variability in d18O and d13C was assessed over the period 1952-2011. Based on these chronologies, we determined the primary climatic controls on stable isotopes and tree physiological responses to changes in atmospheric CO2 concentrations (ca), temperature and humidity. Changes in specific intrinsic water use efficiency (iWUE) were inferred from variations in d13C whereas the effects of CO2 increase on stomatal conductance were explored using d18O. Over the 60-year period, iWUE increased significantly (by ca. 25%) in coincidence with the rise of ca. The two species appear to have different strategies of gas-exchange. Whereas iWUE variations were likely driven by both stomatal conductance and photosynthetic assimilation rates in F. cupressoides, they were largely related to stomatal conductance in N. pumilio. After removing the low-frequency trends related to increasing ca, significant relationships between d13C and summer temperatures were recorded for both species. However, d13C variations in F. cupressoides were more strongly influenced by summer temperatures than in N. pumilio. Our results advocate for an indirect effect of summer temperatures on stable isotope ratios, which is mostly influenced by sunlight radiation in F. cupressoides and relative humidity/soil moisture in N. pumilio. d13C variations in F. cupressoides were spatially correlated to a large area south of 35S in southern South America. These promising results encourage the use of d13C variations in F. cupressoides for reconstructing past variations in temperature and large-scale circulation indexes such as the Southern Annular Mode (SAM) in the Southern Hemisphere.","author":{"name":"Aliénor Lavergne, Valérie Daux, Ricardo Villalba, Monique Pierre, Michel Stievenard, Ana Marina Srur"},"citation":"Aliénor Lavergne, Valérie Daux, Ricardo Villalba, Monique Pierre, Michel Stievenard, Ana Marina Srur. 2017. Improvement of isotope-based climate reconstructions in Patagonia through a better understanding of climate influences on isotopic fractionation in tree rings. Earth and Planetary Science Letters, 459, 372-380. doi: 10.1016/j.epsl.2016.11.045","edition":null,"identifier":{"id":"10.1016/j.epsl.2016.11.045","type":"doi","url":"http://dx.doi.org/10.1016/j.epsl.2016.11.045"},"issue":null,"journal":"Earth and Planetary Science Letters","pages":"372-380","pubRank":"1","pubYear":2017,"reportNumber":null,"title":"Improvement of isotope-based climate reconstructions in Patagonia through a better understanding of climate influences on isotopic fractionation in tree rings","type":"publication","volume":"459"}],"reconstruction":"N","scienceKeywords":["Fitzroya cupressoides (Molina) I.M. Johnst.","alerce","FICU","Patagonian cypress"],"site":[{"NOAASiteId":"56854","geo":{"geoType":"Feature","geometry":{"coordinates":["-41.18","-71.77"],"type":"POINT"},"properties":{"easternmostLongitude":"-71.77","maxElevationMeters":"1060","minElevationMeters":"1060","northernmostLatitude":"-41.18","southernmostLatitude":"-41.18","westernmostLongitude":"-71.77"}},"locationName":"Continent>South America>Argentina","mappable":"Y","paleoData":[{"NOAADataTableId":"32068","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>tree-ring>carbon isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/treering/isotope/southamerica/argentina/alerce2017d13c.txt","linkText":"Rio Alerce Tree-Ring Carbon Isotope Data","urlDescription":"Formatted Text Data File","variables":[{"cvAdditionalInfo":null,"cvDataType":"TREE RING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"year Common Era","cvWhat":"age variable>age"},{"cvAdditionalInfo":null,"cvDataType":"TREE RING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"chemical composition>compound>organic compound>organooxygen compound>cellulose>alpha cellulose","cvMethod":"isotope ratio mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil","cvWhat":"chemical composition>isotope>isotope ratio>delta 13C"}]}],"dataTableName":"RA2017d13C","dataTableNotes":null,"earliestYear":1952,"earliestYearBP":-2,"earliestYearCE":1952,"mostRecentYear":2011,"mostRecentYearBP":-61,"mostRecentYearCE":2011,"species":[{"commonName":["alerce","Patagonian cypress"],"scientificName":"Fitzroya cupressoides (Molina) I.M. Johnst.","speciesCode":"FICU"}],"timeUnit":"AD"}],"siteName":"Rio Alerce"},{"NOAASiteId":"56855","geo":{"geoType":"Feature","geometry":{"coordinates":["-41.18","-71.78"],"type":"POINT"},"properties":{"easternmostLongitude":"-71.78","maxElevationMeters":"1425","minElevationMeters":"1425","northernmostLatitude":"-41.18","southernmostLatitude":"-41.18","westernmostLongitude":"-71.78"}},"locationName":"Continent>South America>Argentina","mappable":"Y","paleoData":[{"NOAADataTableId":"32067","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>tree-ring>carbon isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/treering/isotope/southamerica/argentina/almohadilla2017d13c.txt","linkText":"La Almohadilla Tree-Ring Carbon Isotope Data","urlDescription":"Formatted Text Data File","variables":[{"cvAdditionalInfo":null,"cvDataType":"TREE RING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"year Common Era","cvWhat":"age variable>age"},{"cvAdditionalInfo":null,"cvDataType":"TREE RING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"chemical composition>compound>organic compound>organooxygen compound>cellulose>alpha cellulose","cvMethod":"isotope ratio mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil","cvWhat":"chemical composition>isotope>isotope ratio>delta 13C"}]}],"dataTableName":"ALM2017d13C","dataTableNotes":null,"earliestYear":1952,"earliestYearBP":-2,"earliestYearCE":1952,"mostRecentYear":2011,"mostRecentYearBP":-61,"mostRecentYearCE":2011,"species":[],"timeUnit":"AD"}],"siteName":"La Almohadilla"},{"NOAASiteId":"56856","geo":{"geoType":"Feature","geometry":{"coordinates":["-41.25","-71.28"],"type":"POINT"},"properties":{"easternmostLongitude":"-71.28","maxElevationMeters":"1612","minElevationMeters":"1612","northernmostLatitude":"-41.25","southernmostLatitude":"-41.25","westernmostLongitude":"-71.28"}},"locationName":"Continent>South America>Argentina","mappable":"Y","paleoData":[{"NOAADataTableId":"32066","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>tree-ring>carbon isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/treering/isotope/southamerica/argentina/challhuaco2017d13c.txt","linkText":"Challhuaco Tree-Ring Carbon Isotope Data","urlDescription":"Formatted Text Data File","variables":[{"cvAdditionalInfo":null,"cvDataType":"TREE RING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"year Common Era","cvWhat":"age variable>age"},{"cvAdditionalInfo":null,"cvDataType":"TREE RING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"chemical composition>compound>organic compound>organooxygen compound>cellulose>alpha cellulose","cvMethod":"isotope ratio mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil","cvWhat":"chemical composition>isotope>isotope ratio>delta 13C"}]}],"dataTableName":"CHA2017d13C","dataTableNotes":null,"earliestYear":1952,"earliestYearBP":-2,"earliestYearCE":1952,"mostRecentYear":2011,"mostRecentYearBP":-61,"mostRecentYearCE":2011,"species":[],"timeUnit":"AD"}],"siteName":"Challhuaco"},{"NOAASiteId":"56857","geo":{"geoType":"Feature","geometry":{"coordinates":["-41.13","-71.8"],"type":"POINT"},"properties":{"easternmostLongitude":"-71.8","maxElevationMeters":"950","minElevationMeters":"950","northernmostLatitude":"-41.13","southernmostLatitude":"-41.13","westernmostLongitude":"-71.8"}},"locationName":"Continent>South America>Argentina","mappable":"Y","paleoData":[{"NOAADataTableId":"32065","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>tree-ring>carbon isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/treering/isotope/southamerica/argentina/glaciarfrias2017d13c.txt","linkText":"Glaciar Frias Tree-Ring Carbon Isotope Data","urlDescription":"Formatted Text Data File","variables":[{"cvAdditionalInfo":null,"cvDataType":"TREE RING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"year Common Era","cvWhat":"age variable>age"},{"cvAdditionalInfo":null,"cvDataType":"TREE RING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"chemical composition>compound>organic compound>organooxygen compound>cellulose>alpha cellulose","cvMethod":"isotope ratio mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil","cvWhat":"chemical composition>isotope>isotope ratio>delta 13C"}]}],"dataTableName":"GF2017d13C","dataTableNotes":null,"earliestYear":1952,"earliestYearBP":-2,"earliestYearCE":1952,"mostRecentYear":2011,"mostRecentYearBP":-61,"mostRecentYearCE":2011,"species":[],"timeUnit":"AD"}],"siteName":"Glaciar Frias 2"},{"NOAASiteId":"56858","geo":{"geoType":"Feature","geometry":{"coordinates":["-41.15","-71.8"],"type":"POINT"},"properties":{"easternmostLongitude":"-71.8","maxElevationMeters":"1274","minElevationMeters":"1274","northernmostLatitude":"-41.15","southernmostLatitude":"-41.15","westernmostLongitude":"-71.8"}},"locationName":"Continent>South America>Argentina","mappable":"Y","paleoData":[{"NOAADataTableId":"32064","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>tree-ring>carbon isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/treering/isotope/southamerica/argentina/nubes2017d13c.txt","linkText":"Paso de la Nubes Tree-Ring Carbon Isotope Data","urlDescription":"Formatted Text Data File","variables":[{"cvAdditionalInfo":null,"cvDataType":"TREE RING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"year Common Era","cvWhat":"age variable>age"},{"cvAdditionalInfo":null,"cvDataType":"TREE RING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"chemical composition>compound>organic compound>organooxygen compound>cellulose>alpha cellulose","cvMethod":"isotope ratio mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil","cvWhat":"chemical composition>isotope>isotope ratio>delta 13C"}]}],"dataTableName":"NUB2017d13C","dataTableNotes":null,"earliestYear":1952,"earliestYearBP":-2,"earliestYearCE":1952,"mostRecentYear":2011,"mostRecentYearBP":-61,"mostRecentYearCE":2011,"species":[],"timeUnit":"AD"}],"siteName":"Paso de la Nubes"}],"studyCode":"IITRDB23","studyName":"Northern Patagonia 60 Year Tree-Ring Carbon Isotope Data","studyNotes":"Tree-ring carbon isotope (d13C) annual chronologies from 5 sites and two native species (Fitzroya cupressoides and Nothofagus pumilio) in northern Patagonia, Argentina, for the past 60 years. \r\nIITRDB23","version":"1.0","xmlId":"19268"}