

PRIORITY 6.3
Global Change and Ecosystems
Project Duration:
01.02.2007 - 31.01.2011
The 2008 round of intercomparisons will be done without major human impacts (e.g. dams, irrigation). The plan is to include these human impacts in the next rounds. The total number of rounds including both LHSMs and GHMs will then be three, i.e.:
· #1 (2008): Without human impacts (e.g. dams, irrigation), baseline simulations (i.e. using historical meteorological forcing data).
· #2 (2009): With human impacts, baseline simulations (i.e. historical meteorological forcing data)
· #3 (2009/2010): Future scenarios with human impacts.
#1 will be performed using the NCC (Ngo-Duc et al., 2005) forcing dataset (regridded to 0.5 degrees by Watch WB1, available at the Watch ftp site), while #2 and #3 will be performed using the forcing datasets that will be created by Watch WB1 and WB3.
Ngo-Duc, T., Polcher, J. and Laval, K, 2005, A 53-year forcing data set for land surface models, J. Geophys. Res. 110, D06116, doi:10.1029/2004JD005434.
During the workshop in April 2008, the following workplan for 2008 was decided upon:
| 15 May: | Forcing data and routing network available at the Watch ftp site |
|
15 May - 1 August: |
Model runs |
|
1 August - 1 September: |
Model simulation results should be submitted to the Watch ftp site preferably before 1 August, but definitely before 1 September |
|
3 - 4 November: |
Discussion of results, and planning of the next model simulation rounds |
The focus of the model intercomparison project in 2008 is the differences in model physics.
To facilitate the intercomparison and to discuss results and protocols, a range of workshops are planned, with initially two workshops per year.