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| Titel |
Marine radiocarbon reservoir age simulations for the past 50000 years |
| VerfasserIn |
Martin Butzin, Peter Köhler, Gerrit Lohmann |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250129185
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| Publikation (Nr.) |
 EGU/EGU2016-9260.pdf |
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| Zusammenfassung |
| We present simulations of marine radiocarbon reservoir ages using the ocean general
circulation model LSG-HAMOCC2s, and evaluate the results with Marine13 raw data
records. Our model considers various climatic background states. Radiocarbon
cycle boundary conditions are atmospheric Δ14C values according to IntCal13, a
recent atmospheric CO2 reconstruction, and spatially variable concentrations of
dissolved inorganic carbon derived from marine carbon cycle simulations. Our
model reasonably agrees with glacial marine Δ14C records but indicates reservoir
ages varying with time, different to the invariant reservoir age corrections applied
to the observations and to Marine13. Modelled global-mean reservoir ages are in
the range 400–800 years compared to the invariant Marine13 value of 405 years.
Self-consistent simulations involving the Cariaco Basin record (which is the most
continuous marine record contributing to IntCal13 for periods prior to about 30 kyears)
amplify the temporal reservoir age variability with global-mean values of about
350–850 years, and improve the agreement with Δ14C observations in some areas. |
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