{"NOAAStudyId":"18735","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":"2015-03-20","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-18735.xml","doi":null,"earliestYearBP":962,"earliestYearCE":988,"entryId":"noaa-lake-18735","funding":[{"fundingAgency":"Natural Sciences and Engineering Research Council of Canada","fundingGrant":"Discovery Grant"}],"investigators":"Paquette, N.; Gajewski, K.J.","mostRecentYearBP":-57,"mostRecentYearCE":2007,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/18735","originalSource":null,"publication":[{"abstract":"A pollen profile from a lake with varved sediments sampled at continuous 10-year intervals and spanning the past 1000 years was analyzed to understand the effects of climate change and anthropogenic activity on forests in southwestern Quebec. Pollen assemblages were dominated by arboreal taxa, primarily Pinus, Tsuga, Betula and Fagus. Between 990 and 1560 AD, pollen accumulation rates and percentages of hardwoods (Betula, Fagus, Acer, Ulmus, Tilia) and Tsuga were relatively high. At 1560 AD, PARs of many hardwood taxa (Fagus, Acer, Betula, Fraxinus, Ulmus) and Tsuga abruptly decreased, some remaining low for the remainder of the record (Tsuga, Fagus, Acer), but others increasing after 50 years (Betula, Fraxinus). An increase in non-arboreal pollen between 1810 and 2010 AD was caused by European settlement of the area. The transition in the pollen assemblages beginning at 1560 AD and a climate reconstruction based on these data shows an abrupt climate cooling had a significant impact on the pollen accumulation rates of the region within a couple of decades. A synthesis of this record with other high-resolution and well-dated pollen data from the conifer-hardwood forest of eastern North America shows consistent results across the whole area, indicating that very-high resolution pollen data can provide insight into multi-decadal climate variability and its impact on forest vegetation.","author":{"name":"Nathalie Paquette and Konrad Gajewski "},"citation":"Nathalie Paquette and Konrad Gajewski. 2013. Climatic change causes abrupt changes in forest composition, inferred from a high-resolution pollen record, southwestern Quebec, Canada. Quaternary Science Reviews, 75, 169-180. doi: 10.1016/j.quascirev.2013.06.007","edition":null,"identifier":{"id":"10.1016/j.quascirev.2013.06.007","type":"doi","url":"http://dx.doi.org/10.1016/j.quascirev.2013.06.007"},"issue":null,"journal":"Quaternary Science Reviews","pages":"169-180","pubRank":"1","pubYear":2013,"reportNumber":null,"title":"Climatic change causes abrupt changes in forest composition, inferred from a high-resolution pollen record, southwestern Quebec, Canada","type":"publication","volume":"75"}],"reconstruction":"Y","scienceKeywords":null,"site":[{"NOAASiteId":"56523","geo":{"geoType":"Feature","geometry":{"coordinates":["45.7755","-75.1351"],"type":"POINT"},"properties":{"easternmostLongitude":"-75.1351","maxElevationMeters":null,"minElevationMeters":null,"northernmostLatitude":"45.7755","southernmostLatitude":"45.7755","westernmostLongitude":"-75.1351"}},"locationName":"Continent>North 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