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| Titel |
Paleo-constraints in ensemble climate modelling |
| VerfasserIn |
Helene Muri, Myles Allen, Gideon Henderson, Paul Valdes, Tolu Aina, Milo Thurston |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250040874
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| Zusammenfassung |
| A grand ensemble of paleo-climate models was successfully designed and executed using the
climateprediction.net distributed computing approach. The physical parameters, initial
conditions and boundary conditions were perturbed in a set of experiments distributed to the
general public. We are aiming to provide a framework for the evaluation of the climate
models to see if they are able to simulate climates that were different from today. This will
improve our confidence in the models projections for future climates. A set of robust
mid-Holocene, 6kyBP, climatological features were established to benchmark the climate
model against in order to assess the model’s abilities. This period was chosen due to its
abundance of geological evidence.
The models simulate the broad-scale features of the mid-Holocene climate reasonably
well, though the model performance decreases when the benchmarks are inspected more
closely. The results highlight strengths and weaknesses in the model and stresses the
importance of high quality paleo-observations.
A relationship between the climate sensitivity, i.e. the equilibrium temperature response
to doubling of pre-industrial CO2 concentrations, and the 6kyBP East Asian monsoonal
moisture budget is found. This provides a climate sensitivity range of 2.5–6.1-C. |
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