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MM5 Modeling System Version 2

MM5 Version 2 Release 2-9 (May 25 1998)

Dear MM5 (V2) users,

This email is regarding the MM5 V2 model's newest release: release-2-9.

The highlights of this release include:

1. Removal of some repeated calculations in solve3.F and sound.F to improve code's efficiency and readability.

2. Inclusion of compilation and 'make mm5.deck' options for PC running Linux. The compilation options for PC is placed in a separate configure.user.linux file.

3. bug fixes for MRF PBL (IBLTYP=5), soil temperature model (ISOIL=1), and Goddard microphysics scheme (IMPHYS=6).

The detailed changes are described in the CHANGES file in the top directory of the new tar file. The new tar file can be obtained from several locations, including NCAR's MSS and anonymous ftp.

The CHANGES file separates changes into bug fixes/modification (which you definitely want to include in your files), new features and changes (for which you can make a decision as whether you include them in your copy of the code). In addition to this description, the actual changes are provided in a diff file: diff.25MAY98, in directory ReleaseNotes/.
A user should have enough information from these two files to make corresponding changes to your own files.

If you don't want to get a new tar file, files CHANGES, and diff.25MAY98 can be found from anonymous ftp under /mesouser/MM5V2/MM5, and on paiute/ouray/chipeta under
~mesouser/MM5V2/MM5. They are also accessible from the Web site:

     http://www2.mmm.ucar.edu/mm5/mm5v2-changes-r2-9.html

*** Note: IF YOU HAVE NOT MADE ANY CHANGES TO YOUR TAR FILE (including file structure and source code), YOU SHOULD GET A NEW TAR FILE.

If you use NCAR's Cray, the default tar file you get from MSS will be changed to release-2-9 as of this evening, May 25 1998.
If you would like to use any previous releases, you can change the MSS read statement in the mm5.deck from

     msread mm5v2.tar /MESOUSER/MM5V2/MM5/MM5V2.TAR
to
     msread mm5v2.tar /MESOUSER/MM5V2/MM5/MM5V2.TAR.release-2-8

and so on.

If you are an MPP code user, please obtain a new MPP tar file, since some files have been changed as well. Note that the MPP tar file is now compressed using gzip; therefore the filename on MSS and on NCAR's anonymous ftp is now MPP.TAR.gz.