Some Modeling Stuff

While running George Bryan’s CM1, but I imagine that these will come up in other contexts too. Turbulence Schemes By decomposing the flow into a mean + perturbations and averaging, one obtains the Reynolds-Averaged Navier-Stokes (RANS) equations.  These still contain a perturbation term (the Reynolds stress term), and this term is generally dealt with by prescribing it as some … More Some Modeling Stuff

CHIPS

CHIPS is the Coupled Hurricane Intensity Prediction System (not to be confused with SHIPS, the Statistical Hurricane Intensity Prediction Scheme); it’s a coupled atmosphere-ocean model that predicts intensities based on environmental variables only.  And here’s a nice paper that Kerry (and others) wrote about it.  Some notes: predictions of hurricane tracks have gotten much better over the last … More CHIPS

Madden-Julian Oscillation

Wikipedia says it’s the largest contributor to intraseasonal (time length 30-90 days) variability in the atmosphere, and manifests as an eastward-propagating, alternating stormy/wet phase and dry phase oscillation.  The MJO is a coupling between the large-scale atmospheric circulation and mesoscale tropical deep convection. You can see it in the Hovmoller diagram above (used for looking at … More Madden-Julian Oscillation