Constructing proxy records from age models (COPRA)

S. F.M. Breitenbach, K. Rehfeld, B. Goswami, 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

Research output: Contribution to journalArticlepeer-review

160 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)1765-1779
Number of pages15
JournalClimate of the Past
Issue number5
StatePublished - 2012

All Science Journal Classification (ASJC) codes

  • Global and Planetary Change
  • Stratigraphy
  • Palaeontology


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