{"xmlId":"72530","NOAAStudyId":"30832","studyName":"Porinchu Lake Surface Air Temperature over the Past 10,000 Years","doi":"https://doi.org/10.25921/t4xa-5s58","uuid":"407cc92c-d8b9-46e2-b029-350cdfdd9c12","dataPublisher":"NOAA","contactInfo":{"type":"CONTACT INFORMATION","shortName":"DOC/NOAA/NESDIS/NCEI","longName":"National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce ","address":"325 Broadway, E/NE31","city":"Boulder","state":"CO","postalCode":"80305-3328","country":"USA","dataCenterUrl":"https://www.ncei.noaa.gov/products/paleoclimatology","email":"paleo@noaa.gov","phone":"828-271-4800","fax":null,"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."},"dataType":"CLIMATE RECONSTRUCTIONS","investigators":"Porinchu, D.F.; MacDonald, G.M.; Moser, K.A.; Rolland, N.; Kremenetskii, K.V.; Seppä, H.T.; Rühland, K.M.","investigatorDetails":[{"firstName":"David","lastName":"Porinchu","initials":"D.F.","orcId":null},{"firstName":"Glen","lastName":"MacDonald","initials":"G.M.","orcId":"0000-0002-0267-9825"},{"firstName":"Katrina","lastName":"Moser","initials":"K.A.","orcId":"0000-0001-8633-5677"},{"firstName":"Nicolas","lastName":"Rolland","initials":"N.","orcId":"0000-0001-9883-8124"},{"firstName":"Konstantin","lastName":"Kremenetskii","initials":"K.V.","orcId":null},{"firstName":"Heikki","lastName":"Seppä","initials":"H.T.","orcId":"0000-0003-2494-7955"},{"firstName":"Kathleen","lastName":"Rühland","initials":"K.M.","orcId":"0000-0003-3994-3666"}],"version":"1.0","funding":[],"studyNotes":"This dataset was contributed as part of the Temperature-12k project (https://doi.org/10.25921/4RY2-G808). Data were contributed to the project from the original data generators, who are listed in the Investigator field of this template file. Additional notes regarding the use of these data in the Temperature-12k project can be found in the LiPD file listed as an Online_Resource of this template file.","onlineResourceLink":"https://www.ncei.noaa.gov/access/paleo-search/study/30832","difMetadataLink":"https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-recon-30832.xml","isoMetadataLink":"https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/iso/xml/noaa-recon-30832.xml","originalSource":null,"dataTypeInformation":"https://www.ncei.noaa.gov/products/paleoclimatology/climate-reconstruction","studyCode":null,"scienceKeywords":["Air Temperature Reconstruction"],"reconstruction":"Y","contributionDate":"2020-04-15","entryId":"noaa-recon-30832","earliestYearBP":9980,"mostRecentYearBP":-46,"earliestYearCE":-8030,"mostRecentYearCE":1996,"publication":[{"author":{"name":"Kaufman, D., McKay, N., Routson, C., et al."},"pubYear":2020,"title":"A global database of Holocene paleotemperature records","journal":"Scientific Data","volume":"7","edition":null,"issue":null,"pages":null,"reportNumber":"115","citation":"Kaufman, D., McKay, N., Routson, C., et al. 2020. A global database of Holocene paleotemperature records. Scientific Data, 7, 115. doi: 10.1038/s41597-020-0445-3","type":"publication","identifier":{"type":"doi","id":"10.1038/s41597-020-0445-3","url":"http://dx.doi.org/10.1038/s41597-020-0445-3"},"abstract":null,"pubRank":"2"},{"author":{"name":"David F. Porinchu, Glen M. MacDonald, Katrina A. Moser, Nicolas Rolland, Konstantin Kremenetski, Heikki Seppa, Kathleen M. Ruhland"},"pubYear":2019,"title":"Evidence of abrupt climate change at 9.3 ka and 8.2 ka in the central Canadian Arctic: Connection to the North Atlantic and Atlantic Meridional Overturning Circulation","journal":"Quaternary Science Reviews","volume":"219","edition":null,"issue":null,"pages":"204-217","reportNumber":null,"citation":"David F. Porinchu, Glen M. MacDonald, Katrina A. Moser, Nicolas Rolland, Konstantin Kremenetski, Heikki Seppa, Kathleen M. Ruhland. 2019. Evidence of abrupt climate change at 9.3 ka and 8.2 ka in the central Canadian Arctic: Connection to the North Atlantic and Atlantic Meridional Overturning Circulation. Quaternary Science Reviews, 219, 204-217. doi: 10.1016/j.quascirev.2019.07.024","type":"publication","identifier":{"type":"doi","id":"10.1016/j.quascirev.2019.07.024","url":"http://dx.doi.org/10.1016/j.quascirev.2019.07.024"},"abstract":"This study presents the results of a multi-proxy analysis of a Holocene lacustrine sediment sequence recovered from a small tundra lake in the central Canadian Arctic and links climatic variations there to the North Atlantic. Chironomid and pollen-based reconstructions of mean July air temperature (MJAT) document notable deviations at 9.3 ka and 8.2 ka. Chironomid-inferred July air temperature is depressed by 1.4°C at 9.3 ka and 1.7°C at 8.2 ka relative to the long-term chironomid-inferred Holocene average of 9.4°C. These cooling events also correspond to an increase in Gramineae (Poaceae) and a decrease in Betula pollen, reflecting a decrease in the density of dwarf birch cover. Concurrent, abrupt increases in several diatom taxa, including aerophilic epiphytes, and Sphagnum indicate an expansion of moss habitats as a result of wetter conditions. The expression and timing of the cooling evidenced at TK2 during the early Holocene is consistent with abrupt climate events identified in the North Atlantic and coincides with intervals of North Atlantic cooling and weakened Atlantic Meridional Overturning Circulation (AMOC). This research, which improves our understanding of the spatial extent and magnitude of the 9.3 ka and 8.2 ka events in the central Canadian Arctic, serves as a benchmark for coupled-ocean atmosphere climate models simulating the response of the climate system to abrupt climate events and provides insight in marine-atmosphere teleconnections in the circum-North Atlantic region.","pubRank":"1"}],"site":[{"NOAASiteId":"58486","siteName":"Lake TK2","siteCode":null,"mappable":"Y","locationName":"Continent>North America>Canada>Nunavut","geo":{"geoType":"Feature","geometry":{"type":"POINT","coordinates":["66.3476","-104.9457"]},"properties":{"southernmostLatitude":"66.3476","northernmostLatitude":"66.3476","westernmostLongitude":"-104.9457","easternmostLongitude":"-104.9457","minElevationMeters":"241","maxElevationMeters":"241"}},"paleoData":[{"dataTableName":"TK2.Porinchu.2019","NOAADataTableId":"43586","earliestYear":9980,"mostRecentYear":-46,"timeUnit":"cal yr BP","earliestYearBP":9980,"mostRecentYearBP":-46,"earliestYearCE":-8030,"mostRecentYearCE":1996,"coreLengthMeters":null,"dataTableNotes":"This dataset was contributed as part of the Temperature-12k project (https://doi.org/10.25921/4RY2-G808). Data were contributed to the project from the original data generators, who are listed in the Investigator field of this template file. Additional notes regarding the use of these data in the Temperature-12k project can be found in the LiPD file listed as an Online_Resource of this template file.","species":[],"dataFile":[{"fileUrl":"https://www.ncei.noaa.gov/pub/data/paleo/reconstructions/climate12k/temperature/version1.0.0/Temp12k_directory_NOAA_files/TK2.Porinchu.2019.txt","urlDescription":"NOAA Template File","linkText":"Lake TK2 Air Temperature Reconstruction","variables":[{"cvDataType":"CLIMATE RECONSTRUCTIONS|INSECT|PALEOLIMNOLOGY","cvWhat":"sampling metadata>notes","cvMaterial":null,"cvError":null,"cvUnit":null,"cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":"Data are reliable (Yes or No)","cvFormat":"Character","cvShortName":"Reliable?"},{"cvDataType":"CLIMATE RECONSTRUCTIONS|INSECT|PALEOLIMNOLOGY","cvWhat":"depth variable>depth","cvMaterial":null,"cvError":null,"cvUnit":"length unit>centimeter","cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":null,"cvFormat":"Numeric","cvShortName":"depth"},{"cvDataType":"CLIMATE RECONSTRUCTIONS|INSECT|PALEOLIMNOLOGY","cvWhat":"age variable>age","cvMaterial":null,"cvError":null,"cvUnit":"time unit>age unit>calendar year before present","cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":null,"cvFormat":"Numeric","cvShortName":"age"},{"cvDataType":"CLIMATE RECONSTRUCTIONS|INSECT|PALEOLIMNOLOGY","cvWhat":"earth system variable>temperature variable>temperature>air temperature>surface air temperature","cvMaterial":"reconstruction material>biological assemblage>midge assemblage","cvError":null,"cvUnit":"temperature unit>degree Celsius","cvSeasonality":"1-month period>Jul","cvDetail":null,"cvMethod":null,"cvAdditionalInfo":"Fortin et al. 2015 calibration; WAPLS","cvFormat":"Numeric","cvShortName":"temperature"},{"cvDataType":"CLIMATE RECONSTRUCTIONS|INSECT|PALEOLIMNOLOGY","cvWhat":"earth system variable>temperature variable>temperature>air temperature>surface air temperature","cvMaterial":"reconstruction material>biological assemblage>midge assemblage","cvError":"unspecified error>unspecified error upper bound","cvUnit":"temperature unit>degree Celsius","cvSeasonality":"1-month period>Jul","cvDetail":null,"cvMethod":null,"cvAdditionalInfo":null,"cvFormat":"Numeric","cvShortName":"uncertaintyHigh"},{"cvDataType":"CLIMATE RECONSTRUCTIONS|INSECT|PALEOLIMNOLOGY","cvWhat":"earth system variable>temperature variable>temperature>air temperature>surface air temperature","cvMaterial":"reconstruction material>biological assemblage>midge assemblage","cvError":"unspecified error>unspecified error lower bound","cvUnit":"temperature unit>degree Celsius","cvSeasonality":"1-month period>Jul","cvDetail":null,"cvMethod":null,"cvAdditionalInfo":null,"cvFormat":"Numeric","cvShortName":"uncertaintyLow"}],"NOAAKeywords":["earth science>paleoclimate>reconstructions>air temperature"]},{"fileUrl":"https://www.ncei.noaa.gov/pub/data/paleo/reconstructions/climate12k/temperature/version1.0.0/Temp12k_directory_LiPD_files/TK2.Porinchu.2019.lpd","urlDescription":"Linked Paleo Data (LiPD) File","linkText":"Lake TK2 Air Temperature Reconstruction","variables":[],"NOAAKeywords":["earth science>paleoclimate>reconstructions>air temperature"]}]}]}],"reference":{"pastThesaurusSkos":"https://www.ncei.noaa.gov/access/paleo-search/skos/past-thesaurus.rdf","pastThesaurusExplorer":"https://www.ncei.noaa.gov/access/paleo-search/cvterms","gcmdKeywordThesaurus":"https://earthdata.nasa.gov/earth-observation-data/find-data/idn/gcmd-keywords"},"dataLicenseDescription":null,"dataLicenseUrl":null}