noaa-lake-19380 Lac Brulé, Québec 1400 Year Pollen and Lake Sediment Data Lafontaine-Boyer, K.; Gajewski, K.J. Lac Brulé, Québec 1400 Year Pollen and Lake Sediment Data 2015-03-20 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/19380 Investigator K. Lafontaine-Boyer Investigator K.J. Gajewski earth science paleoclimate climate reconstructions|pollen temperature,null,null,degree Celsius,annual,climate reconstructions|pollen,null,modern analogue technique,N,null earth science paleoclimate fire history|paleolimnology charcoal,sediment,null,count per milliliter,null,fire history|paleolimnology,null,null,N,Macrocharcoal particles >125um earth science paleoclimate climate reconstructions|pollen age,null,null,year Common Era,null,climate reconstructions|pollen,null,null,N,null earth science paleoclimate climate reconstructions|pollen temperature,null,null,degree Celsius,Jun-Aug,climate reconstructions|pollen,null,modern analogue technique,N,null earth science paleoclimate paleolimnology varve thickness,sediment,null,millimeter,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology varve thickness,sediment,one standard deviation,millimeter,null,paleolimnology,composited|smoothed,null,N,composite of 4 cores; running average earth science paleoclimate climate reconstructions|pollen precipitation,null,null,centimeter,Jun-Aug,climate reconstructions|pollen,null,modern analogue technique,N,null earth science paleoclimate paleolimnology age,null,null,year Common Era,null,paleolimnology,null,null,N,null earth science paleoclimate fire history|paleolimnology charcoal,sediment,null,count per square centimeter per year,null,fire history|paleolimnology,null,null,N,Macrocharcoal particles >125um earth science paleoclimate climate reconstructions|pollen precipitation,null,null,centimeter,annual,climate reconstructions|pollen,null,modern analogue technique,N,null earth science paleoclimate paleolimnology calcium carbonate,sediment,null,weight percent,null,paleolimnology,null,loss on ignition,N,loss on ignition at 950 degrees C earth science paleoclimate paleolimnology varve thickness,sediment,null,millimeter,null,paleolimnology,composited|smoothed,null,N,composite of 4 cores; running average earth science paleoclimate climate reconstructions|pollen age,null,null,calendar year before present,null,climate reconstructions|pollen,null,null,N,null earth science paleoclimate paleolimnology organic matter,sediment,null,weight percent,null,paleolimnology,null,loss on ignition,N,loss on ignition at 550 degrees C earth science paleoclimate paleolimnology age,null,null,calendar year before present,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology reconstruction earth science paleoclimate paleolimnology population abundance earth science paleoclimate paleolimnology physical properties geoscientificInformation 605 AD 2005 AD 1345 cal yr BP -55 cal yr BP Complete 45.7192 45.7192 -75.4422 -75.4422 270 270 Continent North America Canada Quebec Lac Brulé>LATITUDE 45.7192>LONGITUDE -75.4422 None 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. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

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Boulder CO 80305-3328 USA online ASCII Karelle Lafontaine-Boyer and Konrad Gajewski 2014 The Holocene 24 11 1515-1526 10.1177/0959683614544054 http://hol.sagepub.com/content/24/11/1515.abstract

A pollen diagram from Lac Brulé in southwestern Québec (45°43'09"N, 75°26'32"W, 270 m) provides a late Holocene history of the vegetation. The presence of varved sediments permitted the development of a high-resolution (10-year), cross-dated chronology with an estimated error of approximately 1%. During the last 1400 years, the forests were dominated by Tsuga, Fagus, Betula, Acer and Pinus. A peak in microcharcoal and evidence of post-fire succession suggest that the changes in the pollen assemblages around ad 1375 were a consequence of a fire in the region. There was a decrease in pollen influx of several deciduous taxa and Tsuga between ad 1600 and 1700, suggesting a rapid climate change that was significant enough to have affected pollen production of these taxa. This change, associated with the beginning of the 'Little Ice Age' in the region, affected the forest composition for the subsequent centuries. A detailed comparison of this pollen record with that from a nearby pollen diagram also prepared at high-temporal resolution shows the ability of pollen records to record short-period climate variations and disturbances. STUDY NOTES: Pollen data plus varve thickness and loss-on-ignition data from Lac Brulé, Québec for the past 1400 years.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/pq/brule2014.xls Excel Data File; Lac Brulé All Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/pq/brule2014recon.txt Data File; Lac Brulé Climate Reconstructions and Synthesis GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/pq/brule2014varve.txt Data File; Lac Brulé Varve Thickness Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/pq/brule2014loi.txt Data File; Lac Brulé Loss-On-Ignition Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/pq/brule2014pollen.txt Data File; Lac Brulé Pollen Counts Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/pq/brule2014par.txt Data File; Lac Brulé Pollen Accumulation Rate Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11