The relative roles of CO₂ and palaeogeography in determining late Miocene climate: results from a terrestrial model–data comparison
- 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.
Author: | Catherine D. Bradshaw, Daniel J. Lunt, Rachel Flecker, Ulrich Salzmann, Matthew J. PoundORCiD, Alan M. Haywood, Jussi Eronen |
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URN: | urn:nbn:de:hebis:30:3-298812 |
URL: | http://www.clim-past.net/8/1257/2012/ |
DOI: | https://doi.org/10.5194/cp-8-1257-2012 |
ISSN: | 1814-9332 |
ISSN: | 1814-9324 |
Parent Title (English): | Climate of the past |
Publisher: | Copernicus Ges. |
Place of publication: | Katlenburg-Lindau |
Document Type: | Article |
Language: | English |
Year of Completion: | 2012 |
Date of first Publication: | 2012/08/16 |
Publishing Institution: | Universitätsbibliothek Johann Christian Senckenberg |
Release Date: | 2013/05/06 |
Volume: | 8 |
Page Number: | 29 |
First Page: | 1257 |
Last Page: | 1285 |
Note: | s.a. Corrigendum to "The relative roles of CO2 and palaeogeography in determining late Miocene climate: results from a terrestrial model-data comparison" published in Clim. Past, 8, 1257–1285, 2012 |
Note: | © Author(s) 2012. This work is distributed under the Creative Commons Attribution 3.0 License. |
HeBIS-PPN: | 339427779 |
Institutes: | Geowissenschaften / Geographie / Geowissenschaften |
Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 55 Geowissenschaften, Geologie / 550 Geowissenschaften |
Sammlungen: | Universitätspublikationen |
Licence (German): | Creative Commons - Namensnennung 3.0 |