{"NOAAStudyId":"13801","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":"2013-02-13","dataPublisher":"NOAA","dataType":"PALEOLIMNOLOGY","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/lake","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-lake-13801.xml","doi":null,"earliestYearBP":null,"earliestYearCE":null,"entryId":"noaa-lake-13801","funding":[],"investigators":"Mayr, C.; Luecke, A.; Maidana, N.I.; Wille, M.; Haberzettl, T.; Corbella, H.; Ohlendorf, C.; Schaebitz, F.; Fey, M.; Janssen, S.; Zolitschka, B.","mostRecentYearBP":null,"mostRecentYearCE":null,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/13801","originalSource":null,"publication":[{"abstract":null,"author":null,"citation":"Haberzettl, T., Corbella, H., Fey, M., Janssen, S., Luecke, A., Mayr, C., Ohlendorf, C., Schaebitz, F., Schleser, G.H., Wille, M., Wulf, S., Zolitschka, B., 2007. Lateglacial and Holocene wet-dry cycles in southern Patagonia: chronology, sedimentology and geochemistry of a lacustrine record from Laguna Potrok Aike, Argentina. The Holocene 17:297-310.","edition":null,"identifier":null,"issue":null,"journal":"The Holocene","pages":null,"pubRank":"2","pubYear":2007,"reportNumber":null,"title":"Lateglacial and Holocene wet-dry cycles in southern Patagonia: chronology, sedimentology and geochemistry of a lacustrine record from Laguna Potrok Aike, Argentina","type":"publication","volume":null},{"abstract":"A combination of carbon-to-nitrogen ratios (TOC/TN), Rock Eval-analyses, and stable isotope values of bulk nitrogen (d15N) and organic carbon (d13Corg) was used to characterize bulk organic matter (OM) of a piston core from the Patagonian maar lake Laguna Potrok Aike (Argentina) for the purpose of palaeoenvironmental reconstruction. Sedimentary data were compared with geochemical signatures of potential OM sources from Laguna Potrok Aike and its catchment area to identify the sources of sedimentary OM. Correlation patterns between isotopic data and TOC/TN ratios allowed differentiation of five distinct phases with different OM composition. Before 8470 calibrated 14C years before present (cal. yrs BP) and after 7400 cal. yrs BP, isotopic and organo-geochemical fingerprints indicate that the sediments of Laguna Potrok Aike consist predominantly of soil and diatom OM with varying admixtures of cyanobacterial and aquatic macrophyte OM. For a short phase of the early Holocene (ca. 8470-7400 cal. yrs BP), however, extremely high input of soil OM is implied by isotopic fingerprints. Previous seismic and geochronological results indicate a severe lake-level drop of 33 m below present-day shortly before 6590 cal. yrs BP. It is suggested that this lake level drop was accompanied by increased erosion of shore banks and channel incision enhancing soil OM deposition in the lake basin. Thus, isotopic data can be linked to hydrological variations at Laguna Potrok Aike and allow a more precise dating of this extremely low lake level. An isotopic mixing model was used including four different sources (soil, cyanobacteria, diatom and aquatic macrophyte OM) to model OM variations and the model results were compared with quantitative microfossil data. Keywords Stable isotopes - Rock Eval analyses - Organic matter - Soil erosion - Isotope mixing model - South America - Late Quaternary - Lake sediments","author":null,"citation":"Mayr, C., Luecke, A., Maidana, N.I., Wille, M., Haberzettl, T., Corbella, H., Ohlendorf, C., Schaebitz, F., Fey, M., Janssen, S., Zolitschka, B., 2009. Isotopic fingerprints on lacustrine organic matter from Laguna Potrok Aike (southern Patagonia, Argentina) reflect environmental changes during the last 16,000 years. Journal of Paleolimnology 42:81-102.\r\n","edition":null,"identifier":{"id":"10.1007/s10933-008-9249-8","type":"doi","url":"http://dx.doi.org/10.1007/s10933-008-9249-8"},"issue":null,"journal":"Journal of Paleolimnology","pages":null,"pubRank":"1","pubYear":2009,"reportNumber":null,"title":"Isotopic fingerprints on lacustrine organic matter from Laguna Potrok Aike (southern Patagonia, Argentina)   reflect environmental changes during the last 16K yrs.linked to rapid glacial climate shift","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":["decadal resolution","centennial resolution","hydrology"],"site":[{"NOAASiteId":"19881","geo":{"geoType":"Feature","geometry":{"coordinates":["-51.95","-70.3833"],"type":"POINT"},"properties":{"easternmostLongitude":"-70.3833","maxElevationMeters":"113","minElevationMeters":"113","northernmostLatitude":"-51.95","southernmostLatitude":"-51.95","westernmostLongitude":"-70.3833"}},"locationName":"Continent>South America>Argentina","mappable":"Y","paleoData":[{"NOAADataTableId":"23487","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>geochemistry","earth science>paleoclimate>paleolimnology>carbon isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/southamerica/argentina/potrok2009.txt","linkText":"potrok2009.txt","urlDescription":"Data","variables":[{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Character","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":null,"cvWhat":"sampling metadata>notes"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"centimeter","cvWhat":"depth variable>depth>depth at sample start"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"centimeter","cvWhat":"depth variable>depth>depth at sample end"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"biological material>bulk biological material>organic matter","cvMethod":"isotope ratio mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil VPDB","cvWhat":"chemical composition>isotope>isotope ratio>delta 13C"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"biological material>bulk biological material>organic matter","cvMethod":"isotope ratio mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil AIR","cvWhat":"chemical composition>isotope>isotope ratio>delta 15N"}]},{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>carbon isotopes","earth science>paleoclimate>paleolimnology>geochemistry"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/southamerica/argentina/potrok2009.xls","linkText":"potrok2009.xls","urlDescription":"Data","variables":[]}],"dataTableName":"Laguna Potrok Aike Core 2008","dataTableNotes":null,"earliestYear":null,"earliestYearBP":null,"earliestYearCE":null,"mostRecentYear":null,"mostRecentYearBP":null,"mostRecentYearCE":null,"species":[],"timeUnit":null}],"siteName":"Laguna Potrok Aike"}],"studyCode":null,"studyName":"Carbon and nitrogen stable isotopes of bulk sediment, ICDP Laguna Potrok Aike   ","studyNotes":null,"version":"1.0","xmlId":"11821"}