noaa-lake-22253 Vuoksjávrátje, Sweden 5100 Year Chironomid and Geochemical Data Berntsson, A.; Jansson, K.N.; Kylander, M.E.; De Vleeschouwer, F.; Bertrand, S. Vuoksjávrátje, Sweden 5100 Year Chironomid and Geochemical Data 2017-06-14 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/22253 Investigator A. Berntsson Investigator K.N. Jansson Investigator M.E. Kylander Investigator F. De Vleeschouwer Investigator S. Bertrand earth science paleoclimate paleolimnology age,null,null,calendar year before present,null,paleolimnology,null,null,N,mid of sample depth; using AMS radiocarbon and Lead 210; Modelled ages - see Chronology earth science paleoclimate insect|paleolimnology midge index,null,null,percent,null,insect|paleolimnology,null,null,N,Terrestrial and semi-terrestrial taxa (indicating terrestrial erosion/sheetflow erosion); For classification used see original publication. earth science paleoclimate insect|paleolimnology midge index,null,null,percent,null,insect|paleolimnology,null,null,N,Combined rheophilic and terrestrial/semi-terrestrial taxa; For classification used see original publication. earth science paleoclimate insect|paleolimnology midge index,null,null,percent,null,insect|paleolimnology,null,null,N,Rheophilic taxa (indicating fluvial erosion); For classification used see original publication. earth science paleoclimate insect|paleolimnology depth,null,null,centimeter,null,insect|paleolimnology,null,null,N,mid of sample depth interval; Note that sediments between 185 and 207 were instantaneously deposited as the result of a flood event. earth science paleoclimate insect|paleolimnology age,null,null,calendar year before present,null,insect|paleolimnology,null,null,N,mid of sample depth; using AMS radiocarbon and Lead 210; Modelled ages - see Chronology earth science paleoclimate paleolimnology depth,null,null,centimeter,null,paleolimnology,null,null,N,mid of sample depth interval; Note that sediments between 185 and 207 were instantaneously deposited as the result of a flood event. earth science paleoclimate paleolimnology silicon/titanium,sediment,null,count per second,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,ITRAX core scanner data - see original publication for details on data handling. earth science paleoclimate paleolimnology population abundance earth science paleoclimate paleolimnology geochemistry geoscientificInformation 5035 cal yr BP -57 cal yr BP Complete 66.249 66.249 15.718 15.718 850 850 Continent Europe Northern Europe Scandanavia Sweden Vuoksjávrátje>LATITUDE 66.249>LONGITUDE 15.718 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 Annika Berntsson, Krister N. Jansson, Malin E. Kylander, Francois De Vleeschouwer and Sebastien Bertrand 2015 Boreas 44 4 676-692 10.1111/bor.12127 http://onlinelibrary.wiley.com/doi/10.1111/bor.12127/full

In this paper, we show the potential of combining multi-proxy analysis of lake sediments with catchment geomorphology to better understand palaeoenvironmental changes. Previous studies have suggested that alpine lakes in N Sweden may be highly sensitive to variations in catchment erosion and precipitation, and that this sensitivity may influence ecologically based reconstructions of past temperature changes. We analysed lake sediments covering the last 5100 years from the alpine Lake Vuoksjávrátje in NW Sweden in order to identify different erosional regimes in the lake catchment, sediment sources and lake sedimentary processes, which ultimately affect the palaeoecological record. The measured proxies include elemental geochemistry from XRF core scanning, grain size, sediment accumulation rates, fraction of terrestrial organic carbon and geomorphological mapping, supported by previously published chironomid and total organic carbon data. From the integrated results we identified time intervals when increased intensity of precipitation altered sedimentation and lake catchment erosional processes. The most prominent event occurred c. 2900 cal. a BP and is interpreted to be the result of excessive precipitation, possibly related to the climatic shift towards cooler and wetter conditions referred to as the 2.8 ka event.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/europe/sweden/vuoksjavratje2015si-ti.txt Formatted Text Data File; Vuoksjávrátje Si/Ti Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/europe/sweden/vuoksjavratje2015chiron.txt Formatted Text Data File; Vuoksjávrátje Chironomid Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11