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| Titel |
A stochastic nonlinear oscillator model for glacial millennial-scale climate transitions derived from ice-core data |
| VerfasserIn |
F. Kwasniok, G. Lohmann |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1023-5809
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 19, no. 6 ; Nr. 19, no. 6 (2012-11-07), S.595-603 |
| Datensatznummer |
250014258
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| Publikation (Nr.) |
 copernicus.org/npg-19-595-2012.pdf |
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| Zusammenfassung |
| A stochastic Duffing-type oscillator model, i.e noise-driven motion with
inertia in a potential landscape, is considered for glacial millennial-scale
climate transitions. The potential and noise parameters are estimated from a
Greenland ice-core record using a nonlinear Kalman filter. For the period
from 60 to 20 ky before present, a bistable potential with a deep well
corresponding to a cold stadial state and a shallow well corresponding to a
warm interstadial state is found. The system is in the strongly dissipative
regime and can be very well approximated by an effective one-dimensional
Langevin equation. |
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