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| Titel |
COnstructing Proxy-Record Age models (COPRA) |
| VerfasserIn |
Norbert Marwan, Kira Rehfeld, Bedartha Goswami, Sebastian F. M. Breitenbach, Jürgen Kurths |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250079567
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| Zusammenfassung |
| Reliable age models are fundamental for any palaeoclimate reconstruction. The increasing
availability of high-resolution palaeoclimate time series, e.g., based on speleothem
archives, has attracted some new activity in the development of alternative and novel
approaches for reconstructing chronologies. Challenges in this effort are (semi-)automatic
outlier, reversal, and hiatus detection and treatment, as well as the inclusion of
information on age uncertainties and independent layer counting to improve the
overall precision of the chronology. However, different dating strategies, different
kinds of palaeoarchive formation, dating uncertainties, and different chronology
construction methods cause a limited comparability of the different palaeoclimate
records.
We present a recently developed framework which addresses these challenges and which
allows the incorporation of layer counting data to improve the reconstructed chronology of a
given time series. Moreover, we introduce the concept of an “absolute” time scale, a common
time axis which works as an invariant reference allowing the comparison of different
palaeoclimate records. This concept translates the age uncertainties into uncertainties in the
proxy values.
This framework is implemented as an open source software (COPRA) for Octave and
Matlab. |
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