An Antarctic assessment of IPCC AR4 coupled models
Article first published online: 29 NOV 2007
Copyright 2007 by the American Geophysical Union.
Geophysical Research Letters
Volume 34, Issue 22, November 2007
How to Cite
2007), An Antarctic assessment of IPCC AR4 coupled models, Geophys. Res. Lett., 34, L22505, doi:10.1029/2007GL031648., and (
- Issue published online: 29 NOV 2007
- Article first published online: 29 NOV 2007
- Manuscript Accepted: 16 OCT 2007
- Manuscript Revised: 28 SEP 2007
- Manuscript Received: 10 AUG 2007
 We assess 19 coupled models from the IPCC fourth assessment report archive from the simulation of the 20th century, based on the calculation of “skill scores.” The models show a wide range of scores when assessed against Antarctic or global measures of large-scale circulation indices. Except for continental mass balance, the model average proves a more reliable estimate than that for any one model. Individual models show a very wide scatter in simulated Antarctic temperature trends over the past century; the large trend over the Antarctic peninsula in winter is not well represented, which makes it clear that whatever has been driving these trends is not well captured by many GCMs. Trends in temperature are clearly linked to the sea ice simulation, another variable that most models do not simulate well.