Hi all,

 The latest version of the 1-d Common Land Model (CLM2 version 13) is ready.
The model physics have been updated to be compatible with the latest
version of the Community Land Model. Changes from the last version
are detailed in the ChangeLog. The ones I want to draw your attention to
are:
1. Implicit soil evaporation term removed (see web site for details)
2. Effective root fraction re-implemented (see web site)
3. Canopy integration scheme for photosynthesis was changed. Sunlit leaves
   receive all of the incoming radiation. Maximum rates of carboxlyation
   were adjusted and are now IGBP-biome specific, as are the other
   photosynthetic parameters. These rates were mapped from rates
   assigned to LSM pfts and may not be wholly appropriate for IGBP biomes.
4. Canopy top and bottom heights implemented to allow for complete burying
   of snow by vegetation.
5. Several bugs were fixed.

You can get the code by:

ftp to goldhill.cgd.ucar.edu
login: anonymous
password: email
cd pub/oleson
get CLMLSM_hybrid_v13.APR_30_2001.tar

The physics changes have been validated primarily by coupled simulations
using the Community Land Model since the physics packages are now basically
the same. These global simulations still yield reasonable results when compared
to Xubin's coupled runs.
Additional testing has been done with the 1-d Common Land Model code:
1. VALDAI runs were performed with surface types of grassland, lake, wetland,
   and land ice. Changes in model output were consistent with the physics
   changes made.
2. BOREAS runs for five tower sites were performed. These yielded reasonable
   results when compared to tower fluxes.
3. Restarts were conducted for these surface types for summer and winter.

This will be our last release of the 1-d Common Land Model code. Any further
development will take place within the Community Land Model infrastructure,
which will be available at some future time.

Let me know if you have any problems getting or running the code.

Thanks for your time,

 Keith