2008 NOV 17 - (VerticalNews.com) -- According to recent research from Dublin, Ireland, "Recent theoretical and observational work shows that the Reynolds stresses due to large-scale extratropical eddies play a key role in determining Hadley cell strength. This implies that errors in the representation of extratropical eddies in climate models could force a bias in the tropical circulation."

  "Here, this hypothesis is assessed using output from 17 coupled climate models, focusing on Northern Hemisphere winter. Inter-model variability in Hadley cell strength, tropical temperature and tropical humidity is found to be significantly correlated with inter-model differences in stationary eddy stress," wrote R. Caballero and colleagues, University College, Climate Center ...read more

  2008 NOV 17 - (VerticalNews.com) -- According to recent research published in the journal Geophysical Research Letters, "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. ...read more

  2008 NOV 17 - (VerticalNews.com) -- According to recent research from the United States, "We use monthly values of geopotential height (GPH) from seven Antarctic stations to examine decadal variations and trends in the overlying troposphere. Whereas the stratospheric signal in our analyses associated with springtime ozone depletion is very detectable, documenting changes in the troposphere is complicated by strong decadal variability and geographical asymmetry. ...read more