2008 NOV 10 - (VerticalNews.com) -- According to a study from Melbourne, Australia, "Three aspects of space-time spectral analysis are explored for diagnosis of the organization of tropical convection by the Madden-Julian oscillation (MJO) and other equatorial wave modes: 1) definition of the background spectrum upon which spectral peaks are assessed, 2) alternate variance preserving display of the spectra, and 3) the space-time coherence spectrum. Here the background spectrum at each zonal wave-number is assumed to result from a red noise process. ...read more

  2008 NOV 10 - (VerticalNews.com) -- According to a study from the United States, "In this study, the relationship between nonlinear model properties and inverse problem solutions is analyzed using a numerical technique based on the inverse problem theory formulated by Mosegaard and Tarantola. According to this theory, the inverse problem and solution are defined via convolution and conjunction of probability density functions (PDFs) that represent stochastic information obtained from the model, observations, and prior knowledge in a joint multidimensional space. ...read more

  2008 NOV 10 - (VerticalNews.com) -- "The tropospheric response to midlatitude SST anomalies has been investigated through a series of aquaplanet simulations using a high-resolution version of the Hadley Centre atmosphere model (HadAM3) under perpetual equinox conditions. Model integrations show that increases in the midlatitude SST gradient generally lead to stronger storm tracks that are shifted slightly poleward, consistent with changes in the lower-tropospheric baroclinicity," researchers in the United Kingdom report ...read more