Journal cover Journal topic
Climate of the Past An interactive open-access journal of the European Geosciences Union
Clim. Past, 8, 1765-1779, 2012
© Author(s) 2012. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
31 Oct 2012
COnstructing Proxy Records from Age models (COPRA)
S. F. M. Breitenbach1, K. Rehfeld2,3, B. Goswami2,4, J. U. L. Baldini5, H. E. Ridley5, D. J. Kennett6, K. M. Prufer7, V. V. Aquino7, Y. Asmerom8, V. J. Polyak8, H. Cheng9,10, J. Kurths2, and N. Marwan2 1Geological Institute, Department of Earth Sciences, ETH Zurich, 8092 Zurich, Switzerland
2Potsdam Institute for Climate Impact Research (PIK), 14412 Potsdam, Germany
3Department of Physics, Humboldt Universität zu Berlin, Newtonstr. 15, 12489 Berlin, Germany
4Department of Physics, University of Potsdam, Karl-Liebknecht Str. 24–25, 14476 Potsdam, Germany
5Department of Earth Sciences, Durham University, Durham DH1 3LE, UK
6Department of Anthropology, The Pennsylvania State University, University Park, PA 16803, USA
7Department of Anthropology, University of New Mexico, Albuquerque, NM 87131, USA
8Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM 87131, USA
9Institute of Global Environmental Change, Xi'an Jiaotong University, Xi'an, China
10Department of Earth Sciences, University of Minnesota, Minneapolis, MN 55455, USA
Abstract. Reliable age models are fundamental for any palaeoclimate reconstruction. Available interpolation procedures between age control points are often inadequately reported, and very few translate age uncertainties to proxy uncertainties. Most available modeling algorithms do not allow incorporation of layer counted intervals to improve the confidence limits of the age model in question.

We present a framework that allows detection and interactive handling of age reversals and hiatuses, depth-age modeling, and proxy-record reconstruction. Monte Carlo simulation and a translation procedure are used to assign a precise time scale to climate proxies and to translate dating uncertainties to uncertainties in the proxy values. The presented framework allows integration of incremental relative dating information to improve the final age model. The free software package COPRA1.0 facilitates easy interactive usage.

Citation: Breitenbach, S. F. M., Rehfeld, K., Goswami, B., Baldini, J. U. L., Ridley, H. E., Kennett, D. J., Prufer, K. M., Aquino, V. V., Asmerom, Y., Polyak, V. J., Cheng, H., Kurths, J., and Marwan, N.: COnstructing Proxy Records from Age models (COPRA), Clim. Past, 8, 1765-1779,, 2012.
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