Das Projekt "High-resolution climate reconstructions from varved Arctic lakes: exploring the potential and limits of non-destructive analytical techniques" wird vom Umweltbundesamt gefördert und von Universität Bern, Geographisches Institut, Gruppe für Klimatologie,Meteorologie durchgeführt. This project centered on the creation of a high-resolution climate reconstruction from Arctic lake sediments and investigation of the potential of high resolution scanning methods, in particular, reflectance spectroscopy. The most significant result was the development of a new approach to calibrate high-resolution biogeochemical measurements (e.g. reflectance spectroscopy or XRF scanning) by combining them with paleothermometer data (e.g. Alkenones or Tex86). This 'proxy-to-proxy' method is especially significant for the Arctic region where a 'calibration-in-time' technique cannot always be applied due to the short and sparse meteorological data network and the difficulties in precisely dating modern sediments. In this study scanning reflectance data from a lake in Western Greenland were calibrated using Alkenone data to create a new high-resolution 6000-year long temperature record. The resolution of the original temperature reconstruction was enhanced to resolve decadal to subdecadal changes, compared to an original multidecaldal to centennial resolution.