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| Titel |
Mid-Pliocene climate modelled using the UK Hadley Centre Model: PlioMIP Experiments 1 and 2 |
| VerfasserIn |
F. J. Bragg, D. J. Lunt, A. M. Haywood |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1991-959X
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| Digitales Dokument |
URL |
| Erschienen |
In: Geoscientific Model Development ; 5, no. 5 ; Nr. 5, no. 5 (2012-09-13), S.1109-1125 |
| Datensatznummer |
250002844
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| Publikation (Nr.) |
 copernicus.org/gmd-5-1109-2012.pdf |
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| Zusammenfassung |
| The Pliocene Model Intercomparison Project (PlioMIP) is a
sub-project of the Paleoclimate Modelling Intercomparison Project (PMIP)
whose objective is to compare predictions of the mid-Pliocene climate from
the widest possible range of general circulation models. The mid-Pliocene
(3.3–3.0 Ma) is the most recent sustained period of greater warmth and
atmospheric carbon dioxide concentration than the pre-industrial times and
as such has potential to inform predictions of our warming climate in the
coming century. This paper describes the UK contribution to PlioMIP using
the Hadley Centre Model both in atmosphere-only mode (HadAM3, PlioMIP
Experiment 1) and atmosphere-ocean coupled mode (HadCM3, PlioMIP Experiment 2).
The coupled model predicts a greater overall warming (3.3 °C) relative to the control than the atmosphere-only (2.5 °C). The Northern
Hemisphere latitudinal temperature gradient is greater in the coupled model
with a warmer Equator and colder Arctic than the atmosphere-only model,
which is constrained by sea surface temperatures from Pliocene proxy
reconstructions. The atmosphere-only model predicts a reduction in
equatorial precipitation and south Asian monsoon intensity, whereas the
coupled model shows an increase in the intensity of these systems. We
present sensitivity studies using alternative boundary conditions for both
the Pliocene and the control simulations, indicating the sensitivity of the
mid-Pliocene warming to uncertainties in both pre-industrial and
mid-Pliocene climate. |
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