Simulating ice core 10Be on the glacial-interglacial timescale ...

• Main Authors: Elsässer, Christoph, Wagenbach, Dietmar, Levin, Ingeborg, Stanzick, A., Christl, Marcus, Wallner, Anton, Kipfstuhl, Sepp, Seierstad, I.K., Wershofen, Herbert, Dibb, Jack
• Format: Article in Journal/Newspaper
• Language: English
• Published: ETH Zurich 2015
• Subjects: ice core
• Online Access: https://dx.doi.org/10.3929/ethz-b-000098338; http://hdl.handle.net/20.500.11850/98338

10Be ice core measurements are an important tool for paleoclimate research, e.g., allowing for the reconstruction of past solar activity or changes in the geomagnetic dipole field. However, especially on multi-millennial timescales, the share of production and climate-induced variations of respective 10Be ice core records is still up for debate. Here we present the first quantitative climatological model of the 10Be ice concentration up to the glacial–interglacial timescale. The model approach is composed of (i) a coarse resolution global atmospheric transport model and (ii) a local 10Be air–firn transfer model. Extensive global-scale observational data of short-lived radionuclides as well as new polar 10Be snow-pit measurements are used for model calibration and validation. Being specifically configured for 10Be in polar ice, this tool thus allows for a straightforward investigation of production- and non-production-related modulation of this nuclide. We find that the polar 10Be ice concentration does not ... : Climate of the Past, 11 (2) ...