Project: 

  Implement prescribed dynamic landuse functionality in CLM3.

Mission:

  An implementation of specified time varying PFT weights on a single
  column as dictated by the needs of the C4MIP experiments.

Goals:

  Successfully execute C4MIP experiments and at the same time preserve
  mass conservation. Incorporate the ability in CLM to use specified 
  time-varying PFTS to drive the dynamic land use experiment.

  As part of the project, the time-varying PFT file contents will be
  defined. This format will be used in future runs.

  To achieve mass conservation during land use modifications, canopy water, 
  carbon and nitrogen transfers between PFTS will have to be implemented.
  This project we will provide an explicit implementation of the treatment
  of canopy water. The treatment of carbon and nitrogen is outside the
  scope of this project.

  In order to get these runs into IPCC - Papers must be submitted by May
  and C4MIP runs have to be finished by end of March. 

  This code will also be used to perform the CCSM dynamic land use
  experiments without CN.  This code will branch from the 1870
  control (b30.020) at year 350.

Motivation:

  The performance of the dynamic land use experiment (without CN) that
   examine the effect of dynamic land use on the IPCC control simulations.

  The completion of the C4MIP experiments. 

Authority:

   Peter Thornton

Project Lead(s):

   Peter Thornton and Mariana Vertenstein

Implementation Plan:

    Phase 1) Determine requirements for presribed dynamic land use
             and specification for dynamic PFT file format.
             Implement functionality in CLM3 for new landunit
             that has all PFTS present but that only does calculations
             where the PFT has non-zero weight.
             4 weeks (Oct 1 - Oct 30)              
             Status: Completed
    Phase 2) Create a dynamic land use dataset
	     Status: Completed
    Phase 3) Implement and test the use of the dataset created in Phase (3)
             2 weeks (Nov 15 - Dec 1)

Resources and Schedule:

               I  II   III 
              ============
     Mariana  80   0    80   ~hours
     Peter     2  40    10
              --  --    --
     Total    42  40    90 

     Total effort: ~2 person-months

Completion Summary (2/25/05)

     This effort was completed on 2/1/2005 with the initiation of the dynamic
     landuse CCSM run (b30.051a). Phase 3 took 6 weeks to complete, rather than
     2 weeks. Keith Oleson and Same Levis are currently responsible for performing
     the CCSM dynamic landuse simulation.