Entry ID: Polar_MM5-Ohio_State
Abstract: Based on the experience of previous research into mesoscale modeling in polar
regions by the Polar Meteorology Group of the Byrd Polar Research Center at The
Ohio State University, the Pennsylvania State University (PSU)-National Center
for Atmospheric Research (NCAR) Fifth-generation Mesoscale Model (MM5) has been
modified for use in polar regions (referred to as the Polar MM5). The key
... modifications are:
Revised cloud / radiation interaction
Modified explicit ice phase microphysics
Modified turbulence (boundary layer) parameterization
Implementation of a sea ice surface type
Improved treatment of heat transfer through snow / ice surfaces.
Model validations and case studies of Polar MM5 simulations over Greenland
and Antarctica have been performed, and these results published in the journal
literature. References and full text versions of these articles are provided
below. The Polar MM5 is now available as options in the public release version
of MM5 (v3.5 and later) from NCAR. For convenience, the source code is also
The Polar MM5 is currently being used for synoptic and climate scale studies
in the data sparse high latitudes. It is also being used to re-create the
paleoclimate conditions over the Laurentide Ice Sheet, which covered most of
North America about 20,000 years ago, prior to its retreat to what is
present-day Greenland. The model is also used by forecasters as part of the
National Science Foundation sponsored Antarctic Mesoscale Prediction System
(AMPS; link provided below) to meet the operational and logistic needs of the
United States Antarctic Program (USAP). Under a collaborative project with the
Polar Meteorology Group, AMPS simulations are performed at the National Center
for Atmospheric Research twice per day (00Z and 12Z initializations), and cover
progressively finer domains ranging from 90-km (covering most of the Southern
Hemisphere) to 3-km (covering the region immediately surrounding McMurdo
Station, the base of USAP operations). A 60-km resolution version of t he Polar
MM5 is run here at the Byrd Polar Research Center once per day as a backup to
AMPS (link provided below).
(Summary adapted from: http://polarmet.mps.ohio-state.edu/PolarMet/.)
Use Constraints Users must register before downloading the PMM5 Source Code.
Bromwich, D.H., J.J. Cassano, T. Klein, G. Heinemann, K.M. Hines, K. Steffen,
and J.E. Box, 2001: Mesoscale modeling of katabatic winds over Greenland with
the Polar MM5. Mon. Wea. Rev., 129, 2290-2309.
Bromwich, D.H., A.J. Monaghan, J.G. Powers, J.J. Cassano, H. Wei, Y. Kuo, and
A. Pellegrini, 2003: Antarctic Mesoscale Prediction System (AMPS): A case study
from the 2000/2001 field season. Mon. Wea. Rev., 131, 412-434.
Bromwich, D.H., A.J. Monaghan, and Z. Guo, 2003: Modeling the ENSO modulation
of Antarctic climate in the late 1990s with Polar MM5. J. Climate, submitted.
Cassano, J.J., J.E. Box, D.H. Bromwich, L. Li, and K. Steffen, 2001: Evaluation
of Polar MM5 simulations of Greenland's atmospheric circulation. J. Geophys.
Res., Special Issue on the PARCA (Program for Arctic Regional Climate
Assessment), 106, 33,867-33,890.
Guo, Z., D.H. Bromwich, and J.J. Cassano, 2003: Evaluation of Polar MM5
simulations of Antarctic atmospheric circulation. Mon. Wea. Rev., 131, 384-411.
Monaghan, A.J., D.H. Bromwich, H. Wei, A.M. Cayette, J.G. Powers, Y.H. Kuo, and
M. Lazzara, 2003: Performance of weather forecast models in the rescue of Dr.
Ronald Shemenski from South Pole in April 2002. Wea. Forecasting, in press.
Wei, H., D.H. Bromwich, Y-H. Kuo, L-S. Bai, and T.K. Wee, 2003: A case study of
the impact of the upper boundary condition in Polar MM5 simulations over
Antarctica. Mon. Wea. Rev., submitted.
Creation and Review Dates