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| Titel |
The early Eocene equable climate problem revisited |
| VerfasserIn |
M. Huber, R. Caballero |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1814-9324
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| Digitales Dokument |
URL |
| Erschienen |
In: Climate of the Past ; 7, no. 2 ; Nr. 7, no. 2 (2011-06-16), S.603-633 |
| Datensatznummer |
250004521
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| Publikation (Nr.) |
 copernicus.org/cp-7-603-2011.pdf |
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| Zusammenfassung |
| The early Eocene "equable climate problem", i.e. warm extratropical annual mean and
above-freezing winter temperatures evidenced by proxy records, has
remained as one of the great unsolved problems in paleoclimate. Recent progress in
modeling and in paleoclimate proxy development provides an opportunity to revisit this
problem to ascertain if the current generation of models can reproduce the past climate
features without extensive modification. Here we have compiled early Eocene terrestrial
temperature data and compared with climate model results using a consistent and rigorous
methodology. We test the hypothesis that equable climates can be explained simply as
a response to increased greenhouse gas forcing within the framework of the atmospheric
component of the Community Climate System Model (version 3), a climate model in common
use for predicting future climate change. We find that, with suitably large radiative
forcing, the model and data are in general agreement for annual mean and cold month
mean temperatures, and that the pattern of high latitude amplification recorded by
proxies can be largely, but not perfectly, reproduced. |
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