Why are climate models reproducing the observed global surface warming so well?

Details Why are climate models reproducing the observed global surface warming so well? Why are climate models reproducing the observed global surface warming so well?

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3518704k&link_type=abstract

Geophysical Research Letters, Volume 35, Issue 18, CiteID L18704

Physics

Geophysics

19

Atmospheric Processes: Global Climate Models (1626, 4928), Global Change: Atmosphere (0315, 0325), Mathematical Geophysics: Prediction (3245, 4263), Hydrology: Uncertainty Assessment (3275), Hydrology: Model Calibration (3333)

Scientific paper

Climate models reproduce the observed surface warming better than one would expect given the uncertainties in radiative forcing, climate sensitivity and ocean heat uptake, suggesting that different models show similar warming for different reasons. It is shown that while climate sensitivity and radiative forcing are indeed correlated across the latest ensemble of models, eliminating this correlation would not strongly change the uncertainty range of long-term temperature projections. However, since most models do not incorporate the aerosol indirect effects, model agreement with observations may be partly spurious. The incorporation of more detailed aerosol effects in future models could lead to inconsistencies between simulated and observed past warming, unless the effects are small or compensated by additional forcings. It is argued that parameter correlations across models are neither unexpected nor problematic if the models are interpreted as conditional on observations.

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