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European Geosciences Union, Climate of the Past, 5(8), p. 1765-1779, 2012

DOI: 10.5194/cp-8-1765-2012

European Geosciences Union, Climate of the Past Discussions, 3(8), p. 2369-2408

DOI: 10.5194/cpd-8-2369-2012

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Constructing proxy records from age models (COPRA)

Journal article published in 2012 by S. F. M. Breitenbach, K. Rehfeld, B. Goswami ORCID, J. U. L. Baldini, H. E. Ridley, D. J. Kennett, K. M. Prufer, V. V. Aquino, Y. Asmerom, V. J. Polyak, H. Cheng, J. Kurths, N. Marwan ORCID
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

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.