Clim. Past Discuss., 8, 5029-5051, 2012
www.clim-past-discuss.net/8/5029/2012/
doi:10.5194/cpd-8-5029-2012
© Author(s) 2012. This work is distributed
under the Creative Commons Attribution 3.0 License.
Review Status
This discussion paper has been under review for the journal Climate of the Past (CP). Please refer to the corresponding final paper in CP.
A new global reconstruction of temperature changes at the Last Glacial Maximum
J. D. Annan and J. C. Hargreaves
Research Institute for Global Change, Yokohama, Japan

Abstract. Some recent compilations of proxy data both on land and ocean (MARGO Project Members, 2009; Bartlein et al., 2011; Shakun et al., 2012), have provided a new opportunity for an improved assessment of the overall climatic state of the Last Glacial Maximum. In this paper, we combine these proxy data with the ensemble of structurally diverse state of the art climate models which participated in the PMIP2 project (Braconnot et al., 2007) to generate a spatially complete reconstruction of surface air (and sea surface) temperatures. We test a variety of approaches, and show that multiple linear regression performs well for this application. Our reconstruction is significantly different to and more accurate than previous approaches and we obtain an estimated global mean cooling of 4.0 ± 0.8 °C (95% CI).

Citation: Annan, J. D. and Hargreaves, J. C.: A new global reconstruction of temperature changes at the Last Glacial Maximum, Clim. Past Discuss., 8, 5029-5051, doi:10.5194/cpd-8-5029-2012, 2012.
 
Search CPD
Discussion Paper
    XML
    Citation
    Final Revised Paper
    Share