{"NOAAStudyId":"16296","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":"2014-04-08","dataPublisher":"NOAA","dataType":"CLIMATE RECONSTRUCTIONS","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/climate-reconstruction","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-recon-16296.xml","doi":null,"earliestYearBP":5964,"earliestYearCE":-4014,"entryId":"noaa-recon-16296","funding":[{"fundingAgency":"Natural Sciences and Engineering Research Council of Canada","fundingGrant":null}],"investigators":"Upiter, L.M.; Vermaire, J.C.; Patterson, R.T.; Crann, C.A.; Galloway, J.M.; Macumber, A.L.; Neville, L.A.; Swindles, G.T.; Falck, H.; Roe, H.M.; Pisaric, M.","mostRecentYearBP":-54,"mostRecentYearCE":2004,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/16296","originalSource":null,"publication":[{"abstract":"We analyzed subfossil chironomids, sediment organic matter and sediment particle size data from a 1.11-m-long freeze core collected from Carleton Lake (unofficial name), located approximately 120 km north of the modern treeline. This well-dated core spans the last ca. 6,500 years. Two chironomid transfer functions were applied to infer mean July air temperatures. Our results indicated that the chironomid-inferred temperatures from this lake sediment record did not pass a significance test, suggesting that other factors in addition to temperature may have been important in structuring the chironomid community through time. Although not statistically significant, the chironomid-inferred temperatures from this site do follow a familiar pattern, with highest inferred temperatures occurring during the Holocene Thermal Maximum (~6-4 cal kyr BP), followed by a long-term cooling trend, which is reversed during the last 600 years. The largest change in the chironomid assemblage, which occurred between ca. 4,600 and 3,900 cal yr BP is possibly related to the well-documented northward advance and subsequent retreat of treeline in this region.","author":{"name":"Lindsay M. Upiter, Jesse C. Vermaire, R. Timothy Patterson, Carley A. Crann, Jennifer M. Galloway, Andrew L. Macumber, Lisa A. Neville, Graeme T. Swindles, Hendrik Falck, Helen M. Roe, Michael F. J. Pisaric"},"citation":"Lindsay M. Upiter, Jesse C. Vermaire, R. Timothy Patterson, Carley A. Crann, Jennifer M. Galloway, Andrew L. Macumber, Lisa A. Neville, Graeme T. Swindles, Hendrik Falck, Helen M. Roe, Michael F. J. Pisaric. 2014. Middle to late Holocene chironomid-inferred July temperatures for the central Northwest Territories, Canada. Journal of Paleolimnology. . doi: 10.1007/s10933-014-9775-5","edition":null,"identifier":{"id":"10.1007/s10933-014-9775-5","type":"doi","url":"http://dx.doi.org/10.1007/s10933-014-9775-5"},"issue":null,"journal":"Journal of Paleolimnology","pages":null,"pubRank":"1","pubYear":2014,"reportNumber":null,"title":"Middle to late Holocene chironomid-inferred July temperatures for the central Northwest Territories, Canada","type":"publication","volume":null},{"abstract":null,"author":{"name":"David Porinchu, Nicolas Rolland, Katrina Moser"},"citation":"David Porinchu, Nicolas Rolland, Katrina Moser. 2009. Development of a chironomid-based air temperature inference model for the central Canadian Arctic. Journal of Paleolimnology, 41(2), 349-368. doi: 10.1007/s10933-008-9233-3","edition":null,"identifier":{"id":"10.1007/s10933-008-9233-3","type":"doi","url":"http://dx.doi.org/10.1007/s10933-008-9233-3"},"issue":"2","journal":"Journal of Paleolimnology","pages":"349-368","pubRank":"3","pubYear":2009,"reportNumber":null,"title":"Development of a chironomid-based air temperature inference model for the central Canadian Arctic","type":"publication","volume":"41"},{"abstract":null,"author":{"name":"Erin M. Barley, Ian R. Walker, Joshua Kurek, Les C. Cwynar, Rolf W. Mathewes, Konrad Gajewski, Bruce P. Finney "},"citation":"Erin M. Barley, Ian R. Walker, Joshua Kurek, Les C. Cwynar, Rolf W. Mathewes, Konrad Gajewski, Bruce P. Finney. 2006. A northwest North American training set: distribution of freshwater midges in relation to air temperature and lake depth. Journal of Paleolimnology, 36(3), 295-314. doi: 10.1007/s10933-006-0014-6","edition":null,"identifier":{"id":"10.1007/s10933-006-0014-6","type":"doi","url":"http://dx.doi.org/10.1007/s10933-006-0014-6"},"issue":"3","journal":"Journal of Paleolimnology","pages":"295-314","pubRank":"2","pubYear":2006,"reportNumber":null,"title":"A northwest North American training set: distribution of freshwater midges in relation to air temperature and lake depth","type":"publication","volume":"36"}],"reconstruction":"Y","scienceKeywords":["Air Temperature Reconstruction","Arctic"],"site":[{"NOAASiteId":"55830","geo":{"geoType":"Feature","geometry":{"coordinates":["64.2572","-110.1008"],"type":"POINT"},"properties":{"easternmostLongitude":"-110.1008","maxElevationMeters":"420","minElevationMeters":"420","northernmostLatitude":"64.2572","southernmostLatitude":"64.2572","westernmostLongitude":"-110.1008"}},"locationName":"Continent>North America>Canada>Northwest Territories","mappable":"Y","paleoData":[{"NOAADataTableId":"26308","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>reconstructions>air temperature"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/insecta/chironomidae/northamerica/canada/nwt/carleton2014cit.txt","linkText":"Carleton Lake Chironomid-inferred Temperature","urlDescription":"Data File","variables":[{"cvAdditionalInfo":"based on Barley et al (2006) transfer function","cvDataType":"CLIMATE RECONSTRUCTIONS|INSECT|PALEOLIMNOLOGY","cvDetail":null,"cvError":"unspecified margin of error","cvFormat":"Numeric","cvMaterial":"reconstruction material>biological assemblage>midge assemblage","cvMethod":null,"cvSeasonality":"1-month period>Jul","cvShortName":null,"cvUnit":"degree Celsius","cvWhat":"earth system variable>temperature variable>temperature>surface temperature"},{"cvAdditionalInfo":null,"cvDataType":"CLIMATE RECONSTRUCTIONS|INSECT|PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"centimeter","cvWhat":"depth variable>depth"},{"cvAdditionalInfo":"present defined as 2010 AD","cvDataType":"CLIMATE RECONSTRUCTIONS|INSECT|PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar year before present","cvWhat":"age variable>age"},{"cvAdditionalInfo":"based on Barley et al (2006) transfer function","cvDataType":"CLIMATE RECONSTRUCTIONS|INSECT|PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"reconstruction material>biological assemblage>midge assemblage","cvMethod":null,"cvSeasonality":"1-month period>Jul","cvShortName":null,"cvUnit":"degree Celsius","cvWhat":"earth system variable>temperature variable>temperature>surface temperature"},{"cvAdditionalInfo":"based on Porinchu et al (2009) transfer function","cvDataType":"CLIMATE RECONSTRUCTIONS|INSECT|PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"reconstruction material>biological assemblage>midge assemblage","cvMethod":null,"cvSeasonality":"1-month period>Jul","cvShortName":null,"cvUnit":"degree Celsius","cvWhat":"earth system variable>temperature variable>temperature>surface temperature"},{"cvAdditionalInfo":"based on Porinchu et al (2009) transfer function","cvDataType":"CLIMATE RECONSTRUCTIONS|INSECT|PALEOLIMNOLOGY","cvDetail":null,"cvError":"unspecified margin of error","cvFormat":"Numeric","cvMaterial":"reconstruction material>biological assemblage>midge assemblage","cvMethod":null,"cvSeasonality":"1-month period>Jul","cvShortName":null,"cvUnit":"degree Celsius","cvWhat":"earth system variable>temperature variable>temperature>surface temperature"}]}],"dataTableName":"Carleton2014CIT","dataTableNotes":null,"earliestYear":5964,"earliestYearBP":5964,"earliestYearCE":-4014,"mostRecentYear":-54,"mostRecentYearBP":-54,"mostRecentYearCE":2004,"species":[],"timeUnit":"cal yr BP"}],"siteName":"Carleton Lake"}],"studyCode":null,"studyName":"Carleton Lake, Northwest Territories 6000yr Chironomid-inferred Temperature","studyNotes":"Fossil midges were processed following methods given in Walker (2001).  Mean July air temperatures were estimated using two separate transfer function models developed by Barley et al. (2006) and Porinchu et al. (2009). ","version":"1.0","xmlId":"14022"}