 |
| Titel |
The relative roles of CO2 and palaeogeography in determining late Miocene climate: results from a terrestrial model–data comparison |
| VerfasserIn |
C. D. Bradshaw, D. J. Lunt, R. Flecker, U. Salzmann, M. J. Pound, A. M. Haywood, J. T. Eronen |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1814-9324
|
| Digitales Dokument |
URL |
| Erschienen |
In: Climate of the Past ; 8, no. 4 ; Nr. 8, no. 4 (2012-08-16), S.1257-1285 |
| Datensatznummer |
250005711
|
| Publikation (Nr.) |
 copernicus.org/cp-8-1257-2012.pdf |
|
|
|
|
|
| Zusammenfassung |
The late Miocene palaeorecord provides evidence for a warmer and wetter
climate than that of today, and there is uncertainty in the palaeo-CO2
record of at least 200 ppm. We present results from fully coupled
atmosphere-ocean-vegetation simulations for the late Miocene that examine
the relative roles of palaeogeography (topography and ice sheet geometry) and
CO2 concentration in the determination of late Miocene climate through
comprehensive terrestrial model-data comparisons. Assuming that these data
accurately reflect the late Miocene climate, and that the late Miocene
palaeogeographic reconstruction used in the model is robust, then results
indicate that:
1. Both palaeogeography and atmospheric CO2 contribute to the
proxy-derived precipitation differences between the late Miocene and modern
reference climates.
However these contributions exibit synergy and so do not add linearly.
2. The vast majority of the proxy-derived temperature differences between
the late Miocene and modern reference climates can only be accounted for if
we assume a palaeo-CO2 concentration towards the higher end of the range
of estimates. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|