2008 NOV 24 - (VerticalNews.com) -- "Estimated tropical cyclone intensities for northwestern Australia over the period 1968/69 to 2000/01 obtained from a recent offshore oil and gas industry review are compared with the Bureau of Meteorology official tropical cyclone best track archive, a modified best track archive and another international reference data-set. Potential influences on the accuracy of estimating tropical cyclone intensity over time due to increasing technology, methodology, knowledge and skill are discussed," researchers in Brisbane, Australia report ...read more

  2008 NOV 17 - (VerticalNews.com) -- "We use the mean meridional tropical circulation of the Atmospheric Ocean Coupled General Circulation Models (AOGCM) to diagnose and quantify the modifications of the mean meridional circulation of the atmosphere under global warming conditions. The AOGCMs generally show a weakening of the Hadley circulation for the winter cell in both hemispheres, accompanied by a poleward extension of the Hadley circulation area," researchers in Paris, France report ...read more

  2008 NOV 17 - (VerticalNews.com) -- According to recent research from Hamburg, Germany, "A general circulation model (GCM) of intermediate complexity (Planet Simulator) is subjected to an analysis of the entropy budget and its sensitivity. The entropy production is computed directly based on temperature and temperature tendencies and estimated indirectly based on boundary fluxes."

  "For indirect estimates, the model shows reasonably good agreement with observations. The direct computation indicates deficits of the indirect measures, as they, for example, overestimate the material entropy production (that is, the production by turbulent fluxes)," wrote K. Fraedrich and colleagues, University of Hamburg ...read more