Hinterburgsee, Switzerland 13,000 Year Chironomid-inferred July Temperature Heiri, O.; Lotter, A.F.; Hausmann, S.; Kienast, F. Heiri, O. Lotter, A.F. Hausmann, S. Kienast, F. Air Temperature Reconstruction temperature earth science/paleoclimate/climate reconstructions|insect|paleolimnology (age,null,null,count,null,climate reconstructions|insect|paleolimnology,null,null,N,null) earth science/paleoclimate/climate reconstructions|insect|paleolimnology (depth,null,null,centimeter,null,climate reconstructions|insect|paleolimnology,null,null,N,null) earth science/paleoclimate/climate reconstructions|insect|paleolimnology (surface air temperature,midge assemblage,null,degree Celsius,Jul,climate reconstructions|insect|paleolimnology,smoothed,null,N,transfer function based reconstruction and loess smoothing (span=0.1)) earth science/paleoclimate/climate reconstructions|insect|paleolimnology (surface air temperature,midge assemblage,null,degree Celsius,Jul,climate reconstructions|insect|paleolimnology,null,null,N,chironomid transfer function based reconstruction) earth science/paleoclimate/climate reconstructions|insect|paleolimnology (surface air temperature,midge assemblage,unspecified margin of error,degree Celsius,Jul,climate reconstructions|insect|paleolimnology,null,null,N,chironomid transfer function reconstruction error) earth science/paleoclimate/climate reconstructions|insect|paleolimnology (age,null,null,calendar year before present,null,climate reconstructions|insect|paleolimnology,null,null,N,null) earth science/paleoclimate/reconstructions (Hinterburgsee>LATITUDE 46.7186>LONGITUDE 8.0686) We developed a quantitative chironomid-July air temperature inference model based on surface sediments from 81 Swiss lakes and applied it to the Holocene subfossil chironomid record of Hinterburgsee, a small subalpine lake in the northern Swiss Alps (present-day mean July air temperature of 11.3°C). After smoothing to reduce the high between-sample variability of inferred temperatures, the reconstruction indicates July air temperatures of 10.4- 10.9°C at the end of the Younger Dryas, of 11.9-12.8°C during the early and mid-Holocene (11500-4000 cal. BP), and slightly lower temperatures of 11.5-12.0°C during the late Holocene (3500-1000 cal. BP). A warming trend inferred for the past millennium is most likely an artifact of human impact on Hinterburgsee's chironomid fauna, rather than a genuine temperature signal. The most prominent climatological events during the Holocene were two periods of lower temperatures at c. 10700-10500 cal. BP and 8200-7700 cal. BP and an abrupt shift to a cooler late-Holocene climate around 4000-3700 cal. BP. Although the chironomid-inferred climate signals were within the prediction error of the model (1.51°C), major inferred temperature changes agree well with other northern and central European climate reconstructions and underline the potential of subfossil chironomid analysis to reconstruct even the moderate climatic changes within the Holocene. STUDY NOTES: Chironomid-inferred July temperature estimates for Hinterburgsee, Switzerland for the past ~13,000 years. A quantitative chironomid-July air temperature inference model based on surface sediments from 81 Swiss lakes was applied to the subfossil chironomid record of Hinterburgsee, a small subalpine lake in the northern Swiss Alps. The chironomid inferred July air temperature estimated standard error of prediction (Root mean square) is 1.51°C. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Heiri, O. Investigator : Lotter, A.F. Investigator : Hausmann, S. Investigator : Kienast, F. 2014-01-02 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/15854 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/europe/switzerland/hinterburgsee2003temp-smoothed.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/europe/switzerland/hinterburgsee2003temp.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/europe/switzerland/hinterburgsee2003temp-smoothed.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/europe/switzerland/hinterburgsee2003temp.txt English https://www.ncdc.noaa.gov/paleo/study/15854 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/europe/switzerland/hinterburgsee2003temp-smoothed.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/europe/switzerland/hinterburgsee2003temp.txt Oliver Heiri, André F. Lotter, Sonja Hausmann, and Felix Kienast2003A chironomid-based Holocene summer air temperature reconstruction from the Swiss AlpsThe Holocene134477-48410.1191/0959683603hl640fthttp://hol.sagepub.com/content/13/4/477.abstract START YEAR: 12901 cal yr BP * END YEAR: -41 cal yr BP 8.0686 46.7186 8.0686 46.7186