Lake CF8, Baffin Island 2,400 Year Multiproxy Sediment Data Thomas, E.K.; Axford, Y.; Briner, J.P. Thomas, E.K. Axford, Y. Briner, J.P. Arctic earth science/paleoclimate/insect|paleolimnology (identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,unspecified midge) earth science/paleoclimate/paleolimnology (carbon,sediment,null,percent,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (carbon/nitrogen,sediment,null,dimensionless,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (delta 13C,sediment,null,per mil PDB,null,paleolimnology,null,null,N,null) earth science/paleoclimate/insect|paleolimnology (identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Orthocladius sp.) earth science/paleoclimate/insect|paleolimnology (identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Heterotrissocladius sp.) earth science/paleoclimate/climate reconstructions|insect|paleolimnology (depth,null,null,centimeter,null,climate reconstructions|insect|paleolimnology,null,null,N,null) earth 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(identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Tanytarsini) earth science/paleoclimate/insect|paleolimnology (identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Tanytarsini no spur) earth science/paleoclimate/paleolimnology (biogenic silica,sediment,null,percent,null,paleolimnology,null,null,N,null) earth science/paleoclimate/insect|paleolimnology (identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Oliveridia sp.) earth science/paleoclimate/insect|paleolimnology (identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Sergentia sp.) earth science/paleoclimate/climate reconstructions|insect|paleolimnology (lake surface temperature,midge assemblage,null,degree Celsius,summer,climate reconstructions|insect|paleolimnology,null,null,N,null) earth science/paleoclimate/climate reconstructions|insect|paleolimnology (age,null,null,year Common Era,null,climate 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earth science/paleoclimate/paleolimnology (Lake CF8>LATITUDE 70.55>LONGITUDE -68.95) The Arctic has a disproportionately large response to changes in radiative forcing of climate, and arctic lacustrine ecosystems respond sensitively to these changes. The goal of this research is to generate high-resolution climate records for the past two millennia using multiple proxies in order to place 20th and 21st century climate and environmental change into a long-term context. We use a 14C- and 210Pb-dated surface core from Lake CF8 on northeastern Baffin Island, Arctic Canada to generate a high-resolution multiproxy reconstruction of climate and environmental change. Throughout the late Holocene, primary productivity in Lake CF8 was low, but increased almost 20-fold in the past 200 years. Insect (Chironomidae) assemblages also show dramatic changes since 1950 AD, with cold stenothermous chironomid taxa disappearing from the record altogether. These changes in productivity and chironomid assemblages are unprecedented in the past 5,000 years. The dramatic ecological shifts that occurred at Lake CF8 have also been observed elsewhere in the Arctic, and will likely continue at ever-increasing rates as anthropogenic inputs of greenhouse gases continue to cause climate warming and enhanced lacustrine primary production. STUDY NOTES: Multiproxy geochemical and productivity record from surface sediment core 05CF8SC collected in Lake CF8, northeastern Baffin Island, Canada. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Thomas, E.K. Investigator : Axford, Y. Investigator : Briner, J.P. 2010-03-12 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/10457 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/baffin/cf8-2008.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/baffin/cf8-2008.xls https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/baffin/cf8-2008.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/baffin/cf8-2008.xls English https://www.ncdc.noaa.gov/paleo/study/10457 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/baffin/cf8-2008.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/baffin/cf8-2008.xls Thomas, E.K., Y. Axford, and J.P. Briner. 2008. Rapid 20th century environmental change on northeastern Baffin Island, Arctic Canada inferred from a multi-proxy lacustrine record. Journal of Paleolimnology, Vol. 40, pp. 507-517. DOI 10.1007/s10933-007-9178-y START YEAR: -440 AD * END YEAR: 2005 AD -68.95 70.55 -68.95 70.55