Simulation of the middle miocene climate optimum

You, Y. and Huber, M. and Muller, R. D. and Poulsen, C. J. and Ribbe, J. (2009) Simulation of the middle miocene climate optimum. Geophysical Research Letters, 36 (4). L04702. ISSN 0094-8276

[img]
Preview
Text (Accepted Version)
You_Huber_Muller_Poulson_Ribbe_2009_Author_version.pdf

Download (412kB)

Abstract

Proxy data constraining land and ocean surface paleo-temperatures indicate that the Middle Miocene Climate Optimum (MMCO), a global warming event at ~15 Ma, had a global annual mean surface temperature of 18.4°C, about 3°C higher than present and equivalent to the warming predicted for the next century. We apply the latest National Center for Atmospheric Research (NCAR) Community Atmosphere Model CAM3.1 and Land Model CLM3.0 coupled to a slab ocean to examine sensitivity of MMCO climate to varying ocean heat fluxes derived from paleo sea surface temperatures (SSTs) and atmospheric carbon dioxide concentrations, using detailed reconstructions of Middle Miocene boundary conditions including paleogeography, elevation, vegetation and surface temperatures. Our model suggests that to maintain MMCO warmth consistent with proxy data, the required atmospheric CO2 concentration is about 460-580 ppmv, narrowed from the most recent estimate of 300-600 ppmv.


Statistics for USQ ePrint 4872
Statistics for this ePrint Item
Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Deposited in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre: Historic - Faculty of Sciences - Department of Biological and Physical Sciences (Up to 30 Jun 2013)
Faculty/School / Institute/Centre: Historic - Faculty of Sciences - Department of Biological and Physical Sciences (Up to 30 Jun 2013)
Date Deposited: 23 Jan 2009 07:36
Last Modified: 22 Nov 2013 02:55
Uncontrolled Keywords: climate change; paleoclimatology; modelling; Miocene; carbon dioxide; sea surface temperature
Fields of Research (2008): 04 Earth Sciences > 0401 Atmospheric Sciences > 040104 Climate Change Processes
04 Earth Sciences > 0401 Atmospheric Sciences > 040105 Climatology (excl.Climate Change Processes)
08 Information and Computing Sciences > 0801 Artificial Intelligence and Image Processing > 080110 Simulation and Modelling
Fields of Research (2020): 37 EARTH SCIENCES > 3702 Climate change science > 370201 Climate change processes
37 EARTH SCIENCES > 3702 Climate change science > 370202 Climatology
46 INFORMATION AND COMPUTING SCIENCES > 4602 Artificial intelligence > 460207 Modelling and simulation
Socio-Economic Objectives (2008): D Environment > 96 Environment > 9603 Climate and Climate Change > 960303 Climate Change Models
Identification Number or DOI: https://doi.org/10.1029/2008GL036571
URI: http://eprints.usq.edu.au/id/eprint/4872

Actions (login required)

View Item Archive Repository Staff Only