Radiative forcing by well-mixed greenhouse gases: Estimates from climate models in the Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report (AR4)

Radiative forcing by well-mixed greenhouse gases: Estimates from climate models in the Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report (AR4)

[1] The radiative effects from increased concentrations of well-mixed greenhouse gases (WMGHGs) represent the most significant and best understood anthropogenic forcing of the climate system. The most comprehensive tools for simulating past and future climates influenced by WMGHGs are fully coupled atmosphere-ocean general circulation models (AOGCMs). Because of the importance of WMGHGs as forc...

Annular mode time scales in the Intergovernmental Panel on Climate Change Fourth Assessment Report models

[1] The ability of climate models in the Intergovernmental Panel on Climate Change Fourth Assessment Report to capture the temporal structure of the annular modes is evaluated. The vertical structure and annual cycle of the variability is quantified by the e-folding time scale of the annular mode autocorrelation function. Models vaguely capture the qualitative features of the Northern and South...

Forced annular variations in the 20th century Intergovernmental Panel on Climate Change Fourth Assessment Report models

[1] We examine the annular mode within each hemisphere (defined here as the leading empirical orthogonal function and principal component of hemispheric sea level pressure) as simulated by the Intergovernmental Panel on Climate Change Fourth Assessment Report ensembles of coupled ocean-atmosphere models. The simulated annular patterns exhibit a high spatial correlation with the observed pattern...

INTERGOVERNMENTAL PANEL ON CLIMATE CHANGE Summary for Policymakers to Climate Change 2001: Synthesis Report of the IPCC Third Assessment Report

Intergovernmental Panel on Climate Change

Supporting material prepared for consideration by the Intergovernmental Panel on Climate Change. This supporting material has not been subject to formal IPCC review process. Preface The Intergovernmental Panel on Climate Change (IPCC) completed its Second Assessment Report in 1995. The IPCC has three Working Groups that focus on different aspects of climate change, viz. natural science, impacts...