The stationary wave response to global climate change in the Geophysical Fluid Dynamics Laboratory's R30 coupled ocean-atmosphere GCM is studied. An ensemble of climate change simulations that use a standard prescription for time-dependent increases of greenhouse gas and sulfate aerosol concentrations is compared to a multiple-century control simulation with these constituents fixed at preindustrial levels. The primary response to climate change is to zonalize the atmospheric circulation, that is, to reduce the amplitude of the stationary waves in all seasons. This zonalization is particularly strong in the boreal summer over the Tropics. In January, changes in the stationary waves resemble that of an El Nin o, and all months exhibit an El Nin o-like increase of precipitation in the central tropical Pacific.
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Joseph et al. (2004) studied this question.
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