Climate of the Past Discussions www.clim-past-discuss.net 1814-9340 1814-9359 3 5 2007 10.5194/cpd-3-1199-2007 http://www.clim-past-discuss.net/3/1199/2007/ http://www.clim-past-discuss.net/3/1199/2007/cpd-3-1199-2007.html http://www.clim-past-discuss.net/3/1199/2007/cpd-3-1199-2007.pdf 1199 1233 2007-10-26 Reconstructing glacier-based climates of LGM Europe and Russia – Part 3: Comparison with GCM and pollen-based climate reconstructions R. Allen robert.allen@landmarkinfo.co.uk M. J. Siegert A. J. Payne School of Geographical Sciences, University of Bristol, University Road, Bristol, BS8 1SS, UK School of GeoSciences, University of Edinburgh, Grant Institute, King's Buildings, West Mains Road, Edinburgh, EH9 3JW, UK now at: Landmark Information Group, 5-7 Abbey Court, Eagle Way, Sowton, Exeter, EX2 7HY, UK Understanding past climates using GCM models is critical to confidently predicting future climate change. Although previous analysis of GCM simulations have shown them to under predicted European glacial temperature anomalies (the difference between modern and glacial temperatures) such analyses have focused primarily on results from glacial simulations alone. Here we compare glacial maximum GCM results with the palaeoenvironment derived from glacier-climate modelling. The comparison confirms that GCM anomalies are under predicted, and that this is due to modern conditions that are modelled too cold and glacial temperatures that are too warm. The result is that CGM results, if applied to a glacier mass balance model, over predict the extent of glaciers today, and under predict their extent at the last glacial (as depicted in glacial geological reconstructions). Effects such as seasonality and model parameterisation change the magnitude of the under prediction but still fail to match expected glacial conditions. Allen, R. J., Siegert, M. J., and Payne, T.: Reconstructing glacier-based climates of LGM Europe and Russia – Part 1: Numerical modelling and validation methods, Clim. Past Discuss., 3, 1133–1166, 2007a. Allen, R. J., Siegert M. J., and Payne, T.: Reconstructing glacier-based climates of LGM Europe and Russia – Part 2: A dataset of LGM climates derived from degree-day modelling of palaeo glaciers, Clim. Past Discuss., 3, 1167–1198, 2007b. Allen, R. J.: Reconstructing the Last Glacial Maximum Climate of Europe and Russia using the Glacial-Geological Record. PhD Thesis, School of Geographical Sciences, University of Bristol, 304pp., 2006. Berger, A. and Loutre, M. F.: Insolation values for the climate of the last 10 million years. Quaternary Sci. Rev., 10, 291-317, 1991. Braithwaite, R. J. and Zhang, Y.: Sensitivity of mass balance of five Swiss glaciers to temperature changes assessed by tuning a degree day model, J. Glaciol., 46, 7–14, 2000. Cowling, S. A. and Sykes, M. T.: Physiological significance of low atmospheric CO₂ for plant-climate interactions, Quaternary Res., 52, 237–242, 1999. Dricot, E., Petillon, M., and Seret, G.: When and why did glaciers grow or melt in the Vosges Mountains (France). In Klimageschichtliche Probleme der Letzten 130 000 Jahre, 1991. Ehlers, J. and Gibbard, P. L. (Eds.): Quaternary Glaciations – Extent and Chronology, Part 1: Europe. Series Editor J. Rose, Developments in Quaternary Science 2, Elsevier, London, 2004. Fairbanks, R. G., Mortlock, R. A., Chiu, T.-C., Cao, L., Kaplan, A., Guilderson, T. P., Fairbanks, T. W., Bloom, A. L., Grootes, P. M., and Nadeau, M.-J.: Radiocarbon calibration curves spanning 0 to 50 000 years BP based on paired $^230Th$/$^234$U/$^238$U and $^14$C dates on pristine corals. Quaternary Sci. Rev., 24, 1781–1796, 2005. Farerra, I., Harrison, S. P., Prentice, I. C., Ramstein, G., Guiot, J., Bartlein, P. J., Bonnefille, R., Bush, M., Cramer, W., von Grafenstein, U., Holmgren, K., Hooghiemstra, H., Hope, G., Jolly, D., Lauritzen S.-E., Ono, Y., Pinot, S., Stute, M., and Yu, G.: Tropical climates at the Last Glacial Maximum: a new synthesis of terrestrial palaeoclimate data. 1. Vegetation, lake-levels and geochemistry, Clim. Dyn., 15, 823–856, 1999. García-Ruiz, J. M., Valero-Garcés, B. L., Martí-Bono, C., and González-Sampériz, P.: Asynchroneity of maximum glacier advances in the central Spanish Pyrenees, J. Quaternary Sci., 18, 61–72, 2003. Gordon, C., Cooper, C., Senior, C. A., Banks, H., Gregory, J. M., Johns, T. C., Mitchell, J. F. B., and Wood, R. A.: The simulation of SST, sea ice extents and ocean heat transports in a version of the Hadley Centre coupled model without flux adjustments, Clim. Dyn., 16, 147–168, 2000. Harrison, S. P.: Contributing to global change science: the ethics, obligations and opportunities of working with palaeoenvironmental databases, Norsk Geografisk Tidsskrift-Norwegian Journal of Geography, 57, 1–8, 2003. Harrison, S. P. and Prentice, C. I.: Climate and CO₂ controls on global vegetation distribution at the last glacial maximum: analysis based on palaeovegetation data, biome modelling and palaeoclimate simulations, Glob. Change Biol., 9, 983–1004, 2003. Harrison, S. P., Braconnot, P., Joussaume, S., Hewitt, C., and Stouffer, R. J.: Comparison of palaeolcimate simulations enhances confidence in models, EOS, Transactions, American Geophysical Union, 83, 447, 2002. Herail, G., Hubschman, J., and Jalut, G.: Quaternary glaciations in the French Pyrenees, Quaternary Sci. Rev., 5, 397–402, 1986. Hoar, M. R., Palutikof, J. P., and Thorne, M. C.: Model intercomparison for the present day, the mid-Holocene, and the Last Glacial Maximum over western Europe, J. Geophys. Res., 109, D08104, doi:10.1029/2003JD004161, 2004. Jost, A., Lunt, D., Kageyama, M., Abe-Ouchi, A., Peyron, O., Valdez, P. J., and Ramstein, G.: High-resolution simulations of the last glacial maximum climate over Europe: a solution to discrepancies with continental palaeoclimatic reconstructions?, Clim. Dyn., 24, 577–590, 2005. Joussame, S. and Taylor, K. E.: Status of the Paleoclimate Modelling Intercomparison Project (PMIP). In: Proceedings of the first international AMIP scientific conference, Monterrey, California, USA, 15–19 May, WRCP-92, 425–430, 1995. Kageyama, M., Peyron, O., Pinot, S., Tarasov, P., Guiot, J., Joussaume, S., and Ramstein, G.: The Last Glacial Maximum climate over Europe and western Siberia: a PMIP comparison between models and data, Clim. Dyn., 17, 23–43, 2001. Kageyama, M., Harrison, S. P., and Abe-Ouchi, A.: The depression of tropical snowlines at the last glacial maximum: What can we learn from climate model experiments?, Quatern. Int., 138–139, 202–219, 2005. Kislov, A. V., Tarasov, P. E., and Sourkova, G. V.: Pollen and other proxy-based reconstructions and PMIP Simulations of the Last Glacial Maximum mean annual temperature: an attempt to harmonize the data-model comparison procedure, Acta Palaeontologica Sinica, 41, 539–545, 2002. Kohfeld, K. E. and Harrison, S. P.: How well can we simulate past climates? Evaluating the models using global palaeoenvironmental datasets, Quaternary Sci. Rev., 19, 321–346, 2000. Kotlyakov, V. M. and Krenke, A. N.: Investigations of the hydrological conditions of alpine regions by glaciological methods. International Association of Hydrological Science Publications, 138, 31–42, 1982. Leonard, E. M.: Climatic change in the Colorado Rocky Mountains: estimates based on the modern climates at Late Pleistocene equilibrium lines, Arctic Alpine Res., 21, 245–255, 1989. Mark, B. G., Harrison, S. P., Spessa, A., New, M., Evans, D. J. A., and Helmens, K. F.: Tropical snowlines changes at the last glacial maximum: A global assessment, Quatern. Int., 138–139, 168–201, 2005. National Snow and Ice Data Center. World Glacier Inventory. World Glacier Monitoring Service and National Snow and Ice Data Center/World Data Center for Glaciology. Boulder, CO. Digital Media. 1999. New, M., Lister, D., Hulme, M., and Makin, I.: A high-resolution data set of surface climate over global land areas, Climate Res., 21, 1–25, 2002. Ohmura, A., Kasser, P., and Funk, M.: Climate at the equilibrium line of glaciers, J. Glaciol., 38(130), 397–411, 1992. Owen, L. A. and Benn, D. I.: Equilibrium-line altitudes of the Last Glacial Maximum for the Himalaya and Tibet: an assessment and evaluation of results, Quatern. Int., 138–139, 55–78, 2005. Peltier, W. R.: Global Glacial Isostasy and the Surface of the Ice-Age Earth: The ICE-5G(VM2) model and GRACE, Ann. Rev. Earth Pl. Sci., 32, 111–149, 2004. Peyron, O., Guiot, J., Cheddadi, R., Tarasov, P., Reille, M., de Beaulieu, J.-L., Bottema, S., and Andrieu, V.: Climatic reconstruction in Europe for 18 000 yr BP from pollen data, Quaternary Res., 49, 183–196, 1998. Pollard, D. and PMIP Participating Groups.: Comparisons of ice-sheets surface mass budgets from the Paleoclimate Modeling Intercomparison Project (PMIP) simulations, Global Planet. Change, 24, 79–106, 2000. Pope, V. D., Gallani, M. L., Rowntree, P. R., and Stratton, R. A.: The impact of a new physical parameterizations in the Hadley Centre climate model – HadAM3, Clim. Dyn., 16, 123–146, 2000. Porter, S. C.: Present and past glaciation threshold in the Cascade Range, Washington, U.S.A.: Topographic and climatic controls and paleoclimatic implications, J. Glaciol., 18, 101–116, 1977. Prentice, I. C., Guiot, J., Huntley, B., Jolly, D., and Cheddadi, R.: Reconstructing biomes from palaeoecological data: A general method and its application to European pollen data at 0 k and 6 ka, Clim. Dyn., 12, 185–194, 1996. Prentice, I. C., Cramer, W., Harrison, S. P., Leemans, R., Monserud, R. A., and Solomon, A. M.: A global biome model based on plant physiology and dominance, soil properties, and climate, J. Biogeogr., 19, 117–134, 1992. Sanchez, M. F. and Arquer, P. F.: New radiometric and geomorphological evidences of a last glacial maximum older than 18 ka in SW European mountains: the example of Redes National Park (Cantabrian Mountains, NW Spain), Geodin. Acta, 15, 93–101, 2002. Tarasov, P. E., Peyron, O., Guiot, J., Brewer, S., Volkova, V. S., Bezusko, L. G., Dorofeyuk, N. I., Kvavadze, E. V., Osipova, I. M., and Panova, N. K.: Last Glacial Maximum climate of the former Soviet Union and Mongolia reconstructed from pollen and plant macrofossil data, Clim. Dyn., 15, 227–240, 1999. Tarasov, P. E., Volkova, V. S., Webb III, T., Guiot, J., Andreev, A. A., Bezusko, L. G., Bezusko, T. V., Bykova G. V, Dorofeyuk, N. I., Kvavadze, E. V., Osipova, I. M., Panova, N. K., and Sevastyanov, D. V.: Last Glacial Maximum biomes reconstructed from pollen and plant macrofossil data from northern Eurasia, J. Biogeogr., 27, 609–620, 2000. USGS. 1996: http://edcdaac.usgs.gov/gtopo30/gtopo30.html, accessed 15 September 2007. Woodward, J. C., Macklin, M. G., and Smith, G. R.: Pleistocene glaciation in the mountains of Greece, in: Quaternary Glaciations – Extent and Chronology Part I: Europe, edited by: Ehlers J. and Gibbard, P. L., 155-174, 2004.