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| Titel |
Reconstruction of uncertain age-depth relationships |
| VerfasserIn |
N. Marwan, B. Goswami, K. Rehfeld, S. F. M. Breitenbach, J. Kurths |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250062500
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| Zusammenfassung |
| Dating geoscientific records inevitably includes uncertainties, originating from systematic
errors, such as dating errors, positioning errors during sampling, and from random errors
(e.g., disturbances in the sediment). However, age models are frequently derived simply by
linear interpolation, considering, if any, only the systematic dating error. Even though discrete
dating points are presented with their errors, these uncertainties are often not discussed
while interpreting the proxy record. Recapitulation of subjectively calculated age
models is often hampered by insufficient reporting of the details of the interpolation
procedure.
We present a new approach of estimating ensembles of age models by simple
Monte Carlo simulation and non-linear interpolation, its potential in removing age
reversals and in translating dating uncertainties into time series with uncertainties. We
demonstrate the effects of dating uncertainties and the usability of our method in an
application of palaeo-climate variation derived from stalagmites from the Asian monsoon
region. |
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