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MM5 Modeling System Overview
Recent Developments
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Updated Terrain program
to use USGS global 30 sec terrain elevation data.
In the past, the 30 sec terrain is only available over continental
US. With the newly available global 30 sec terrain dataset,
the updated terrain program can produce high resolution terrain
field for MM5. The new terrain program can also derive better
resolution landuse data from (nearly) global 30 sec vegetation
data. This program was released April 7, 1999 for Version 2
and in summer 1999 for Version 3. This program can be run on
Cray as well as workstations. The new terrain also has improved
coastline.
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Program REGRID
This program performs the same function as Datagrid and more,
and has replaced Datagrid in the Version 3 release in the summer
of 1999. This program supports various datasets archived at
NCAR, and many other GRIB datasets. It has the advantage of making
it easier to input user's datasets, and portable to many computer
platforms.
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Program LITTLE_R
This program may be used in place of Rawins. Like program
REGRID, LITTLE_R makes accessing data from sources other than
those from NCAR's archive easier. Most functions in Rawins have
been made available since Version 3-5 release in December 2001.
In Version 3 release, both LITTLE_R and Rawins are supported.
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One-source code Rawins
This program has been modified to run on both Cray and workstation
platforms since April 1999 and it is now standard in Version
3. However this version of Rawins still only uses data from
NCAR archive, but converted to workstation format.
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Version 3 release of entire modeling system (Summer 1999)
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Year 2000 compliant; this affects all programs.
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Improved SOLVE3 code in MM5 model for clarity and efficiency.
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New data format with smaller header, and self-describing
fields.
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Land-surface model.
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The most recent release is Version 3-6.
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