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Coupled Simulations of the Mid-holocene and Last Glacial Maximum: New Results from Pmip2 : Volume 2, Issue 6 (13/12/2006)

By Braconnot, P.

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Book Id: WPLBN0004006888
Format Type: PDF Article :
File Size: Pages 54
Reproduction Date: 2015

Title: Coupled Simulations of the Mid-holocene and Last Glacial Maximum: New Results from Pmip2 : Volume 2, Issue 6 (13/12/2006)  
Author: Braconnot, P.
Volume: Vol. 2, Issue 6
Language: English
Subject: Science, Climate, Past
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Merkel, U., Otto-Bliesner, B., Ramstein, G., Harrison, S., Valdes, P., Zhao, Y.,...Fichefet, T. (2006). Coupled Simulations of the Mid-holocene and Last Glacial Maximum: New Results from Pmip2 : Volume 2, Issue 6 (13/12/2006). Retrieved from

Description: Laboratoire des Sciences du Climat et de l'Environnement, Unité mixte CEA-CNRS-UVSQ, Orme des Merisiers, bât. 712, 91191 Gif-sur-Yvette Cedex, France. A set of coupled ocean-atmosphere simulations using state of the art climate models is now available for the Last Glacial Maximum and the mid-Holocene through the second phase of the Paleoclimate Modeling Intercomparison Project (PMIP2). This study presents the large scale features of the simulated climates and compares the new model results to those of the atmospheric models from the first phase of the PMIP, for which sea surface temperature was prescribed or computed using simple slab ocean formulations. We consider first the large scale features of the climate change, pointing out some of the major differences between the different sets of experiments. Then we quantify the latitudinal shift of the location of the ITCZ in the tropical regions during boreal summer. It is shown that this shift is limited for LGM, whereas a northward shift and an increase of precipitation are well depicted for mid-Holocene in continental regions affected by monsoon precipitation. In the last part we quantify for both periods the feedback from snow and sea-ice in mid and high latitudes. We show that it contributes for half of the cooling in the northern hemisphere for LGM, the second half being achieved by the reduced CO2 and water vapour in the atmosphere. For mid-Holocene the snow and albedo feedbacks strengthen spring cooling and enhance boreal summer warming, whereas water vapour reinforces the late summer warming. These feedbacks are modest in the southern hemisphere. For LGM most of the surface cooling is due to CO2 and water vapour.

Coupled simulations of the mid-Holocene and Last Glacial Maximum: new results from PMIP2

Berger, A.: Long-term variations of caloric solar radiation resulting from the earth's orbital elements, Quat. Res., 9, 139–167, 1978.; Bony, S., Colman, R., Kattsov, V. M., Allan, R. P., Bretherton, C. S., Dufresne, J. L., Hall, A., Hallegatte, S., Holland, M. M., Ingram, W., Randall, D. A., Soden, B. J., Tselioudis, G., and Webb, M. J.: How well do we understand and evaluate climate change feedback processes?, J. Climate, 19, 3445–3482, 2006.; Braconnot, P., Joussaume, S., Marti, O., and de Noblet, N.: Synergistic feedbacks from ocean and vegetation on the African monsoon response to mid-Holocene insolation, Geophys.Res. Lett., 26, 2481–2484, 1999.; Braconnot, P., Joussaume, S., de Noblet, N., and Ramstein, G.: Mid-holocene and Last Glacial Maximum African monsoon changes as simulated within the Paleoclimate Modelling Intercomparison Project, Global Planet. Change, 26, 51–66, 2000a.; Braconnot, P., Marti, O., Joussaume, S., and Leclainche, Y.: Ocean feedback in response to 6 kyr BP insolation, J. Climate, 13, 1537–1553, 2000b.; Braconnot, P., Loutre, M. F., Dong, B., Joussaume, S., and Valdes, P.: How the simulated change in monsoon at 6 ka BP is related to the simulation of the modern climate: results from the Paleoclimate Modeling Intercomparison Project, Clim. Dyn., 19, 107–121, 2002.; Braconnot, P.: Modeling the last glacial maximum and mid-holocene, Comptes Rendus Geoscience, 336, 711–719, 2004.; Braconnot, P., Harrison, S., Joussaume, J., Hewitt, C., Kitoh, A., Kutzbach, J., Liu, Z., Otto-Bleisner, B. L., Syktus, J., and Weber, S. L.: Evaluation of coupled ocean-atmosphere simulations of the mid-Holocene, Past Climate Variability through Europe and Africa, R. W. b. e. al., Ed., Kluwer Academic publisher, 2004.; Cane, M. A., Braconnot, P., Clement, A., Gildor, H., Joussaume, S., Kageyama, M., Khodri, M., Paillard, D., Tett, S., and Zorita, E.: Progress in paleoclimate modeling, J. Climate, 19, 5031–5057, 2006.; CLIMAP, 1981: Seasonal reconstructions of the Earth's surface at the last glacial maximum, Map Series Technical Report MC-36, 1981.; Claussen, M. and Gayler, V.: The greening of the Sahara during the mid-Holocene: results of an interactive atmosphere-biome model, Glob. Ecol. Biogeogr. Lett., 6, 369–377, 1997.; Crucifix, M.: Does the Last Glacial Maximum constrain climate sensitivity?, Geophys. Res. Lett., 33, L18701, doi:10.1029/2005GL027137, 2006.; Douville, H.: Detection-attribution of global warming at the regional scale: How to deal with precipitation variability?, Geophys. Res. Lett., 33, L02701, doi:10.1029/2005GL024967, 2006.; Farrera, 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. I. Vegetation, lake-levels and geochemistry, Clim. Dyn., 15, 823–856, 1999.; Gadgil, S. and Sajani, S.: Monsoon precipitation in the AMIP runs, Clim. Dyn., 14, 659–689, 1998.; Ganopolski, A., Kubatzki, C., Claussen, M., Brovkin, V., and Petoukhov, V.: The influence of Vegetation-atmosphere-Ocean Interaction on Climate During the Mid-Holocene, Science, 280, 1916–1919, 1998.; 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.; Haak, H., Jungclaus, J., Mikolajewicz, U., and Latif, M.: Formation and propagation of great salinity anomalies, Geophys. Res. Lett., 30, 1473, doi:10.1029/2003GL017065, 2003.; Harrison, S.: Palaeoenvironmental data set and model evaluation in PMIP.


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