{"NOAAStudyId":"8660","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":"2009-09-01","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-8660.xml","doi":null,"earliestYearBP":1950,"earliestYearCE":0,"entryId":"noaa-lake-8660","funding":[],"investigators":"Ojala, A.E.K.; Alenius, T.","mostRecentYearBP":-45,"mostRecentYearCE":1995,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/8660","originalSource":null,"publication":[{"abstract":"Physical properties of varves formed over the last ca. 10000 years from Lake Nautajrvi, central southern Finland provide a potential proxy record of winter precipitation and temperature via catchment runoff and erosion. The seasonal-scale varved data indicate that the winter severity and duration of summer growing season has changed considerably during the Holocene in southern central Finland. Periods of increased catchment erosion occurred at 590-7530 BC, 7450-7400 BC, 7220-7110 BC, 7000-6000 BC, 5400-5200 BC, 4400-4000 BC, 2700–2400 BC, ca. 1500 BC to AD 500, and 1400 AD onwards. The observed\r\nchanges are likely related to severe winters conditions with high net accumulation of snow between ca. 7500 BC and AD 300, whereas AD 300 onwards an increasing agricultural input is seen in the varve and pollen data. Periods that can be interpreted as indicating attenuated spring floods caused by milder and wetter winters appeared around 7000 BC and AD 1000-AD 1200, the latter corresponding with the last historically recorded warm interval in Europe, known as the Medieval Climate Anomaly","author":{"name":"Antti E.K. Ojala, Teija Alenius"},"citation":"Antti E.K. Ojala, Teija Alenius. 2009. 10000 years of interannual sedimentation recorded in the Lake Nautajarvi (Finland) clastic-organic varves. Palaeogeography, Palaeoclimatology, Palaeoecology, 219(3-4), 285-302. doi: 10.1016/j.palaeo.2005.01.002","edition":null,"identifier":{"id":"10.1016/j.palaeo.2005.01.002","type":"doi","url":"http://dx.doi.org/10.1016/j.palaeo.2005.01.002"},"issue":"3-4","journal":"Palaeogeography, Palaeoclimatology, Palaeoecology","pages":"285-302","pubRank":"1","pubYear":2009,"reportNumber":null,"title":"10000 years of interannual sedimentation recorded in the Lake Nautajarvi (Finland) clastic-organic varves","type":"publication","volume":"219"}],"reconstruction":"N","scienceKeywords":["PAGES 2k Network","PAGES Arctic 2k"],"site":[{"NOAASiteId":"22957","geo":{"geoType":"Feature","geometry":{"coordinates":["61.8","24.683"],"type":"POINT"},"properties":{"easternmostLongitude":"24.683","maxElevationMeters":"103","minElevationMeters":"103","northernmostLatitude":"61.8","southernmostLatitude":"61.8","westernmostLongitude":"24.683"}},"locationName":"Continent>Europe>Northern Europe>Scandanavia>Finland","mappable":"Y","paleoData":[{"NOAADataTableId":"12536","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>physical properties"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/europe/finland/nautajarvi2005.txt","linkText":"nautajarvi2005.txt","urlDescription":"Data","variables":[{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"year Common Era","cvWhat":"age variable>age"},{"cvAdditionalInfo":"x10-4 mm; varve mineral layer thickness","cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"millimeter","cvWhat":"physical property>length>varve thickness"},{"cvAdditionalInfo":"x10-4 mm; varve organic layer thickness","cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"millimeter","cvWhat":"physical property>length>varve thickness"},{"cvAdditionalInfo":"measured on a grayscale of 0-255","cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":"x-ray densitometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"electromagnetic property>absorbance"}]},{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>physical properties"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/europe/finland/nautajarvi2005.xls","linkText":"nautajarvi2005.xls","urlDescription":"Data","variables":[]}],"dataTableName":"Lake Nautajärvi Core NAUTA","dataTableNotes":null,"earliestYear":1950,"earliestYearBP":1950,"earliestYearCE":0,"mostRecentYear":-45,"mostRecentYearBP":-45,"mostRecentYearCE":1995,"species":[],"timeUnit":"cal yr BP"}],"siteName":"Lake Nautajärvi"}],"studyCode":null,"studyName":"Lake Nautajarvi, Finland 2000 Year Varved Sediment Data","studyNotes":"Sediment varve thickness and X-Ray density data from Lake Nautajarvi, central Finland. ","version":"1.0","xmlId":"2290"}