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Comparison of a single‐column model in weak temperature gradient mode to its parent AGCM

A single‐column model (SCM) version of the HadGEM1 is run in weak temperature gradient (WTG) mode, assuming a free‐tropospheric temperature profile obtained from the same single‐column model in radiative–convective equilibrium (RCE) over a sea‐surface temperature (SST) of 301 K. The resulting quasi‐steady solutions are compared with climate statistics from time‐dependent solutions of the full three‐dimensional (3D) Atmospheric General Circulation Model (AGCM) sharing the same physics, with the aim of evaluating the strengths and weaknesses of the WTG parametrization of large‐scale dynamics.