Kangerlussuaq, Greenland Holocene Multiproxy Lake Sediment Data Anderson, N.J.; Liversidge, A.C.; McGowan, S.; Jones, M.D. Anderson, N.J. Liversidge, A.C. McGowan, S. Jones, M.D. PAGES 2k Network PAGES Arctic 2k earth science/paleoclimate/paleolimnology (organic matter,sediment,null,percent,null,paleolimnology,null,loss on ignition,N,550 degrees for 5 hours) earth science/paleoclimate/paleolimnology (organic carbon,sediment,null,gram per square meter per year,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (depth,null,null,centimeter,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (weight,dry sediment,null,percent,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (age,null,null,year,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (sample identification,null,null,null,null,paleolimnology,null,null,C,null) earth science/paleoclimate/paleolimnology (weight,wet sediment,null,percent,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (accumulation rate,dry sediment,null,gram per square centimeter per year,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (titanium,sediment,null,count per second,null,paleolimnology,null,energy-dispersive x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (organic matter,sediment,null,gram per square centimeter per year,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (mineral matter,sediment,null,gram per square centimeter per year,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (calcium,sediment,null,count per second,null,paleolimnology,null,energy-dispersive x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (density,dry sediment,null,gram per cubic centimeter,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (depth,null,null,centimeter,null,paleolimnology,null,null,N,adjusted depth) earth science/paleoclimate/paleolimnology (age,null,null,calendar year before present,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology earth science/paleoclimate/paleolimnology (AT1>LATITUDE 66.968>LONGITUDE -53.402) (SS8>LATITUDE 67.011>LONGITUDE -51.074) (SS1381>LATITUDE 67.014>LONGITUDE -51.102) (AT4>LATITUDE 66.965>LONGITUDE -53.499) The Kangerlussuaq area of southwest Greenland is a lake-rich landscape that covers a climate gradient: a more maritime, cooler and wetter coastal zone contrasts with a dry, continental interior. Radiocarbon- dated sediment sequences (covering ~11,200-8,300 cal year) from paired lakes at the coast and the head of the fjord were analysed for lithostratigraphic variables (organic-matter content, bulk density, Ti, Ca). Minerogenic and carbon accumulation rates from the four lakes were compared to determine catchment and lake response to Holocene climatic variability. Catchment erosion at the coast was dominated by cryonival processes, with considerable sediment production due to the limited vegetation cover and exposed rock faces. Input of minerogenic sediment at one site (AT4) was high (>1 gDW cm-2 year-1) during the period 5,800-4,000 cal year BP, perhaps reflecting intensification of cryogenic processes on northeast-facing slopes and rapid delivery to the lake. This period of erosional activity was not observed at the nearby, higher elevation site (AT1) due to the lower catchment relief; instead, there was an abrupt decline in carbon and minerogenic accumulation rates at ~5,800 cal year BP. Sediment accumulation rates at the inland sites were much lower (<0.005 gDW cm-2 year-1) reflecting greater catchment stability (more extensive vegetation cover), lower relief and substantially lower precipitation, but synchronous increases in mineral accumulation rates from ~1,200 to 1,000 cal year BP may reflect wind erosion associated with regional cooling and local aridity. Carbon-accumulation-rate profiles were similar at the two inland sites, with higher-than-average accumulation (~6-8 g C m-2 year-1) during the early Holocene and a subsequent decline after ~6,000 cal year BP. At the inland lakes, both mineral and carbon accumulation rates exhibited a stronger link to climate, driven by trends in effective precipitation and regional aeolian activity. Catchment differences (relief, altitude) lead to more individualistic records in both erosion history and lake productivity at the coast. STUDY NOTES: Multiproxy Holocene sediment data from 4 lakes in Kangerlussuaq, southwest Greenland. The lakes sampled include two near the coast (AT1 and AT4) and two at the head of the fjord (SS1381 and SS8). Paleoenvironmental proxies measured include Loss-on-Ignition (LOI), Mass Accumulation Rate (MAR), bulk density, plus Calcium and Titanium content derived from XRF. Kangerlussuaq lake locations: SS1381: 67.014°N, 51.102°W, 196m elevation, 18m water depth. SS8: 67.011°N, 51.074°W, 188m elevation, 10m water depth. AT1: 66.968°N, 53.402°W, 475m elevation, 16m water depth. AT4: 66.965°N, 53.499°W, 200m elevation, 17m water depth. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Anderson, N.J. Investigator : Liversidge, A.C. Investigator : McGowan, S. Investigator : Jones, M.D. 2012-06-30 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/13115 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/greenland/kangerlussuaq2012.xls https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/greenland/kangerlussuaq2012.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/greenland/kangerlussuaq2012.xls https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/greenland/kangerlussuaq2012.txt English https://www.ncdc.noaa.gov/paleo/study/13115 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/greenland/kangerlussuaq2012.xls https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/greenland/kangerlussuaq2012.txt Anderson, N.J., A.C. Liversidge, S. McGowan, and M.D. Jones. 2012. Lake and catchment response to Holocene environmental change: spatial variability along a climate gradient in southwest Greenland. Journal of Paleolimnology, Vol. 48, No. 1, June 2012, pp. 209-222. DOI: 10.1007/s10933-012-9616-3 START YEAR: 10329 cal yr BP * END YEAR: -58 cal yr BP -53.499 66.965 -51.074 67.014