Langebroek, Petra

Lohmann, Gerrit

Werner, Martin

English

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Geophysical Research AbstractsVol. 12, EGU2010-4897-1, 2010EGU General Assembly 2010© Author(s) 2010Present-day climate near the Bunker Cave (Germany): comparison ofmodel simulations to observations.Petra M. Langebroek, Martin Werner, and Gerrit LohmannAlfred Wegener Institute for Polar and Marine Research (AWI), Bremerhaven, Germany (petra.langebroek@awi.de)Because of their high temporal resolution and good preservation, speleothem records are often used as indicatorsfor past climatic conditions. During the last years, substantial scientific progress has been made on the interpre-tation of these proxy records in terms of temperature and precipitation changes. Unfortunately, the link betweenclimatic conditions within the cave (as depicted from the speleothems) to the climate outside the cave is notstraightforward for many cave locations. In order to improve this connection, it is important to have accuratespeleothems data as well as high-resolution large-scale climate data.In this study we focus on the latter problem. Within the framework of the DAPHNE (“Dated SpeleothemsArchives of the Paleoenvironment”) Project we investigated available climate measurements (stations from theDeutsche Wetterdienst and from the Global Network of Isotopes in Precipitation) in the region surrounding theBunker Cave, which is located close to Iserlohn in Germany. These measurements are compared, on a largerscale, to reanalysis data (ECMWF-ERA40) and simulation results from an atmospheric general circulation modelwith isotope diagnostics built into the models hydrological cycle (ECHAM). We used statistical downscaling toestablish a connection between the large-scale information and the local climate surrounding the Bunker Cave.Understanding how the local present-day climate above the cave is influenced will largely improve our knowledgeof palaeoclimate as derived from the speleothem records.

Present-day climate near the Bunker Cave (Germany): comparison of model simulations to observations

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