Evaluation of Polar MM5 Simulations of Antarctic Atmospheric Circulation*

Recent trends in Antarctic snow accumulation from Polar MM5 simulations.

Polar MM5, a mesoscale atmospheric model optimized for use over polar ice sheets, is employed to simulate Antarctic accumulation in recent decades. Two sets of simulations, each with different initial and boundary conditions, are evaluated for the 17yr period spanning 1985-2001. The initial and boundary conditions for the two sets of runs are provided by the (i) European Centre for Medium-Range...

Mm5 Wintertime Simulations of the Antarctic Boundary-layer Wind Forcing

Modeling the ENSO Modulation of Antarctic Climate in the Late 1990s with the Polar MM5

The Polar fifth-generation Pennsylvania State University–NCAR Mesoscale Model (MM5) is employed to examine the El Niño–Southern Oscillation (ENSO) modulation of Antarctic climate for July 1996–June 1999, which is shown to be stronger than for the mean modulation from 1979 to 1999 and appears to be largely due to an eastward shift and enhancement of convection in the tropical Pacific Ocean. This...

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Simulations of twentieth century atmospheric circulation changes over Australia

We examine the performance of coupled models to simulate twentieth century winter circulation changes throughout the southern hemisphere, and particularly over Australia. A number of studies have recently shown that the early to mid-1970s was a time of major shifts in the structure of the large-scale circulation of both the northern and southern hemispheres. Over southern Australia there was a ...