Lac Noir, Quebec 1,000 Year Pollen Data and Climate Reconstructions Paquette, N.; Gajewski, K.J. Paquette, N. Gajewski, K.J. earth science/paleoclimate/climate reconstructions|pollen (age,null,null,calendar year before present,null,climate reconstructions|pollen,null,null,N,present=2010 AD) earth science/paleoclimate/fire history|paleolimnology (charcoal,sediment,null,square micrometer per milliliter,null,fire history|paleolimnology,null,null,N,Microcharcoal concentration size class 2 437.5-875 um2) earth science/paleoclimate/fire history|paleolimnology (charcoal,sediment,null,square micrometer per square centimeter per year,null,fire history|paleolimnology,null,null,N,Microcharcoal influx total) earth science/paleoclimate/paleolimnology (age,null,null,calendar year before present,null,paleolimnology,null,null,N,present = 2010 AD) 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 (volume magnetic susceptibility,sediment,null,dimensionless (CGS system),null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (depth,null,null,centimeter,null,paleolimnology,null,null,N,null) earth science/paleoclimate/fire history|paleolimnology (charcoal,sediment,null,square micrometer,null,fire history|paleolimnology,null,null,N,Microcharcoal area size class 2 437.5-875 um2) earth science/paleoclimate/fire history|paleolimnology (charcoal,sediment,null,square micrometer per milliliter,null,fire history|paleolimnology,null,null,N,Microcharcoal concentration total) earth science/paleoclimate/paleolimnology (principal component,null,null,dimensionless,null,paleolimnology,null,null,N,PC #2) earth science/paleoclimate/fire history|paleolimnology (charcoal,sediment,null,square micrometer,null,fire history|paleolimnology,null,null,N,Microcharcoal area size class 3 875-1750 um2) earth science/paleoclimate/fire history|paleolimnology (charcoal,sediment,null,square micrometer per square centimeter per year,null,fire history|paleolimnology,null,null,N,Microcharcoal influx size class 1 218.75-437.5 um2) earth science/paleoclimate/fire history|paleolimnology (charcoal,sediment,null,square micrometer per square centimeter per year,null,fire history|paleolimnology,null,null,N,Microcharcoal influx size class 3 875-1750 um2) 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,square micrometer,null,fire history|paleolimnology,null,null,N,Microcharcoal area size class 4 >=1750 um2) earth science/paleoclimate/fire history|paleolimnology (charcoal,sediment,null,square micrometer per milliliter,null,fire history|paleolimnology,null,null,N,Microcharcoal concentration size class 1 218.75-437.5 um2) earth science/paleoclimate/fire history|paleolimnology (charcoal,sediment,null,square micrometer per milliliter,null,fire history|paleolimnology,null,null,N,Microcharcoal concentration size class 3 875-1750 um2) earth science/paleoclimate/fire history|paleolimnology (charcoal,sediment,null,square micrometer per square centimeter per year,null,fire history|paleolimnology,null,null,N,Microcharcoal influx size class 2 437.5-875 um2) 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 (principal component,null,null,dimensionless,null,paleolimnology,null,null,N,PC #1) earth science/paleoclimate/fire history|paleolimnology (charcoal,sediment,null,square micrometer per square centimeter per year,null,fire history|paleolimnology,null,null,N,Microcharcoal influx size class 4 >=1750 um2) 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 (varve thickness,sediment,null,centimeter,null,paleolimnology,null,null,N,null) earth science/paleoclimate/fire history|paleolimnology (charcoal,sediment,null,square micrometer,null,fire history|paleolimnology,null,null,N,Microcharcoal area size class 1 218.75-437.5 um2) earth science/paleoclimate/fire history|paleolimnology (charcoal,sediment,null,square micrometer per milliliter,null,fire history|paleolimnology,null,null,N,Microcharcoal concentration size class 4 >=1750 um2) earth science/paleoclimate/paleolimnology earth science/paleoclimate/paleolimnology earth science/paleoclimate/paleolimnology earth science/paleoclimate/paleolimnology earth science/paleoclimate/paleolimnology (Lac Noir>LATITUDE 45.7755>LONGITUDE -75.1351) 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. STUDY NOTES: High-resolution (decadal scale) pollen and sediment physical properties record from Lac Noir, southwestern Quebec, spanning the past 1,000 years. Chronology is based on varve counts except for the upper 6.5 cm, which is based on 210Pb. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Paquette, N. Investigator : Gajewski, K.J. 2015-03-20 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/18735 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/pq/lacnoir2013loi.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/pq/lacnoir2013pollen.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/pq/lacnoir2013charcoal.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/pq/lacnoir2013ms.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/pq/lacnoir2013recon.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/pq/lacnoir2013varve.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/pq/lacnoir2013.xls https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/pq/lacnoir2013loi.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/pq/lacnoir2013pollen.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/pq/lacnoir2013charcoal.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/pq/lacnoir2013ms.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/pq/lacnoir2013recon.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/pq/lacnoir2013varve.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/pq/lacnoir2013.xls English https://www.ncdc.noaa.gov/paleo/study/18735 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/pq/lacnoir2013loi.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/pq/lacnoir2013pollen.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/pq/lacnoir2013charcoal.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/pq/lacnoir2013ms.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/pq/lacnoir2013recon.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/pq/lacnoir2013varve.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/pq/lacnoir2013.xls Nathalie Paquette and Konrad Gajewski 2013Climatic change causes abrupt changes in forest composition, inferred from a high-resolution pollen record, southwestern Quebec, CanadaQuaternary Science Reviews75169-18010.1016/j.quascirev.2013.06.007 START YEAR: 988 AD * END YEAR: 2007 AD -75.1351 45.7755 -75.1351 45.7755