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Modelling Northern Hemisphere Ice Sheets Distribution During Mis5 and Mis7 Glacial Inceptions : Volume 8, Issue 6 (18/12/2012)

By Colleoni, F.

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Book Id: WPLBN0003983622
Format Type: PDF Article :
File Size: Pages 47
Reproduction Date: 2015

Title: Modelling Northern Hemisphere Ice Sheets Distribution During Mis5 and Mis7 Glacial Inceptions : Volume 8, Issue 6 (18/12/2012)  
Author: Colleoni, F.
Volume: Vol. 8, Issue 6
Language: English
Subject: Science, Climate, Past
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Navarra, A., Masina, S., Cherchi, A., Otto-Bliesner, B., Ritz, C., Peyaud, V., & Colleoni, F. (2012). Modelling Northern Hemisphere Ice Sheets Distribution During Mis5 and Mis7 Glacial Inceptions : Volume 8, Issue 6 (18/12/2012). Retrieved from

Description: Centro Euro-Mediterraneo per i Cambiamenti Climatici, Bologna, Italy. The present manuscript compares the last two glacial inceptions, Marine Isotope Stage 5 (MIS5, 125–115 kyr BP) and MIS7 (236–229 kyr BP) with the aim to detect the relative impact of external forcing (orbitals and GHG) and ice-albedo feedbacks on the ice sheets growth and distribution in the Northern Hemisphere high latitudes. In order to investigate the differences between those two states, we combine atmosphere-ocean coupled model experiments and off-line ice-sheet-model simulations. In particular, we use a low resolution coupled Atmosphere-Ocean-Sea-ice general circulation model to simulate the mean climate of the four time periods associated with the inception states of MIS5 and MIS7 (i.e. 236, 229, 125 and 115 kyr BP). The four mean states are then use to force a 3-D thermodynamical ice sheet model by means of two types of ice sheet experiments, i.e., steady-state and transient experiments. Our results show that steady-state ice experiments underestimate the ice volume at both 229 kyr BP and 115 kyr BP. On the other hand, the simulated pre-inception ice distributions at 236 kyr BP and 125 kyr BP are in good agreement with observations indicating that during these periods feedbacks associated with external forcing dominate over other processes. However, if proper ice-elevation and albedo feedbacks are not taken into consideration, the evolution towards glacial inception in terms of ice volume and extent is hardly simulated. The experimental setup chosen allows us to conclude that, depending on the mean background climate state, the effect of model biases on climate are more important during a cold inception, such as MIS7, than during a warm inception, such as MIS5. The last results suggest to be cautious when tuning and calibrating Earth System Models on a specific time period, mainly for the purpose of ice sheet-climate coupling.

Modelling Northern Hemisphere ice sheets distribution during MIS5 and MIS7 glacial inceptions

Abe-Ouchi, A., Segawa, T., and Saito, F.: Climatic Conditions for modelling the Northern Hemisphere ice sheets throughout the ice age cycle, Clim. Past, 3, 423–438, doi:10.5194/cp-3-423-2007, 2007.; Berger, A. L.: Long-term variations of daily insolation and quaternary climatic changes, J. Atmos. Sci., 35, 2362–2367, 1978.; Bintanja, R. and van de Wal, R. S. W.: North American ice-sheet dynamics and the onset of 100,000-year glacial cycles, Nature, 454, 869–872, 2008.; Adler, R., Huffman, G., Chang, A., Ferraro, R., Xie, P., Janowiak, J., Rudolf, B., Schneider, U., Curtis, S., Bolvin, D., Gruber, A., Susskind, J., and Arkin, P.: The Version 2 Global Precipitation Climatology Project (GPCP) Monthly Precipitation Analysis (1979–Present), J. Hydrometeorol., 4, 1147–1167, 2003.; Bintanja, R., van de Wal, R. S. W., and Oerlemans, J.: Modelled atmospheric temperatures and global sea levels over the past million years, Nature, 437, 126–128, 2005.; Bonelli, S., Charbit, S., Kageyama, M., Woillez, M.-N., Ramstein, G., Dumas, C., and Quiquet, A.: Investigating the evolution of major Northern Hemisphere ice sheets during the last glacial-interglacial cycle, Clim. Past, 5, 329–345, doi:10.5194/cp-5-329-2009, 2009.; Born, A., Kageyama, M., and Nisancioglu, K. H.: Warm Nordic Seas delayed glacial inception in Scandinavia, Clim. Past, 6, 817–826, doi:10.5194/cp-6-817-2010, 2010.; Calov, R. and Marsiat, I.: Simulations of the Northern Hemisphere through the last glacial-interglacial cycle with a vertically integrated and a three-dimensional thermomechanical ice sheet model coupled to a climate model, Ann. Glaciol., 27, 169–176, 1998.; Calov, R., Ganopolsi, A., Petoukhov, V., Claussen, M., Brovkin, V., and Kutbatzki, C.: Transient simulation of the last glacial inception. Part II: sensitivity and feedback analysis, Clim. Dynam., 24, 563–576, 2005{a}.; Calov, R., Ganopolski, A., Claussen, M., Petoukhov, V., and Greve, R.: Transient simulation of the last glacial inception. Part I: glacial inception as a bifurcation in the climate system, Clim. Dynam., 24, 545–561, 2005{b}.; Calov, R., Ganopolski, A., Kubatzki, C., and Claussen, M.: Mechanisms and time scales of glacial inception simulated with an Earth system model of intermediate complexity, Clim. Past, 5, 245–258, doi:10.5194/cp-5-245-2009, 2009.; Caputo, R.: Sea-level curves: perplexities of an end-user in morphotectonic applications, Global Planet. Change, 57, 417–423, 2007.; Charbit, S., Ritz, C., and Ramstein, G.: Simulations of Northern Hemisphere ice-sheet retreat: sensitivity to physical mechanisms involved during the Last Deglaciation, Quaternary Sci. Rev., 23, 245–263, 2002.; Charbit, S., Ritz, C., Philippon, G., Peyaud, V., and Kageyama, M.: Numerical reconstructions of the Northern Hemisphere ice sheets through the last glacial-interglacial cycle, Clim. Past, 3, 15–37, doi:10.5194/cp-3-15-2007, 2007.; Dong, B. and Valdes, P.: Sensitivity studies of Northern Hemi- sphere glaciation using an atmospheric general circulation model, J. Climate, 8, 2471–2496, 1995.; Colleoni, F., Krinner, G., and Jakobsson, M.: Sensitivity of the Late Saalian (140 kyrs BP) and LGM (21 kyrs BP) Eurasian ice sheet surface mass balance to vegetation feedbacks, Geophs. Res. Lett., 36, L08704, doi:10.1029/2009GL037200, 2009{a}.; Colleoni, F., Krinner, G., Jakobsson, M., Peyaud, V., and Ritz, C.: Influence of regional factors on the surface mass balance of the large Eurasian ice sheet during the peak Saalian (140 kyrs BP), Global Planet. Change, 68, 132–148, 2009{b}.; de Noblet, N., Prentice, I. C., Jousse


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