Arctic sea ice and atmospheric circulation under the GeoMIP G1 scenario

J. C. Moore, A. Rinke, X. Yu, D. Ji, X. Cui, Y. Li, K. Alterskjær, J. E. Kristjánsson, H. Muri, O. Boucher, N. Huneeus, B. Kravitz, A. Robock, U. Niemeier, M. Schulz, S. Tilmes, S. Watanabe, and S. Yang

Journal of Geophysical Research, D: Atmospheres (27 January 2014)

DOI: 10.1002/2013JD021060

We analyze simulated sea ice changes in eight different Earth System Models that have conducted experiment G1 of the Geoengineering Model Intercomparison Project (GeoMIP). The simulated response of balancing abrupt quadrupling of CO2 (abrupt4xCO2) with reduced shortwave radiation successfully moderates annually averaged Arctic temperature rise to about 1°C, with modest changes in seasonal sea ice cycle compared with the preindustrial control simulations (piControl). Changes in summer and autumn sea ice extent are spatially correlated with temperature patterns but much less in winter and spring seasons. However, there are changes of ±20

keywords: geoengeneering; Arctic sea ice; Arctic atmosphere; 0750 Sea ice; 1605 Abrupt/rapid climate change; 1627 Coupled models of the climate system; 1610 Atmosphere; 9315 Arctic region

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