SAHRA

1. luis.bastidas usu.edu @ PILPS San Pedro - Sevilleta Albuquerque Sevilleta Phoenix SAHRA Tucson Lucky Hills Kendall

2. SAHRA PILPS Semi Arid Experiment Sponsors Arizona New Mexico Kendall Tucson Albuquerque Phoenix Lucky Hills USA Sevilleta L. Bastidas H. Gupta, B. Nijssen W. Emmerich E. Small

3. Locations

4. Split Sample Test Forcings 1996 1997 1998 1999 2000 San Pedro Shrub & Grass Outputs 1996 1997 1998 1999 2000 Forcings 2000 2001 2002 Sevilleta Shrub & Grass Outputs 2000 2001 2002 Forcings 1993 1994 Tucson Mixed Shrub & Cacti Outputs 1993 1994 Calibration Period Data Supplied Evaluation Period Data NOT supplied Spin up Period Data Supplied

5. Science Questions • What is the ability of the models to reproduce the water, energy, and carbon exchanges in semi-arid environments? • Are the current (usually single) representations of semi-arid lands in the models enough to reproduce the different environments that exist in those areas? • Does model calibration reduce the among-model range in the model simulations? • How much influence does the model parameterization have on the parameter estimations of “physically meaningful” parameters? • Do current carbon representations, developed for forests, properly reproduce carbon exchanges over vegetated arid lands?

6. Ancillary Information • Vegetation type • Vegetation cover fraction • Height of vegetation • Leaf Area Index • Surface albedo • Longwave emissivity Information to be supplied Forcings • Rainfall and snowfall. • Wind speed. • Air temperature. • Specific humitidy, derived from relative humidity at the Lucky Hills and Kendall sites. • Incident shortwave radiation • Incident longwave radiation, from N-LDAS. • Surface pressure form NCEP model outputs.

7. Analysis on • Monthly mean • Daily mean • Daily amplitude • Daily phase • Min and max of the diurnal cycle • Values at each time step

9. Data Handling

10. Timeline • June 2003, Submission of final experimental protocol • August 27-29, 2003, Workshop for training of participants in the use of the multi-criteria procedures • September 2003, Distribution of forcing data to the participants through website www.sahra.arizona.edu/pilpssanpedro • September 30, 2003, submission of model information and default parameter sets used by the models for semi-arid areas. • October 31, 2003, Submission of default parameter simulations • November 1, 2003, Distribution of calibration data • January 31, 2004, Deadline for submission of results both ad-hoc and multi-criteria calibrations • May 2004, Workshop for analysis of preliminary results.

11. So Far … USA - COLA (Paul Dirmeyer, Xiang Gao) USA - NCEP Ken Mitchell Dag Lohmann Qingyun Duan USA - VISA U Texas Austin (Liang Yan, Guofeng Niu) USA - CLM2 U Texas Austin (Liang Yan, Guofeng Niu) USA - Mosaic, Catchment NASA GSFC (Randy Koster) USA – SSib, UCLA – Yonkang Xue CANADA - CLASS - Diana Verseghy FRANCE - ORCHIDEE MeteoFrance (Jan Polcher-Nicolas Viovy) AUSTRALIA CIRES - Andy Pitman RUSSIA Russian Academy of Sciences, Institute of Geography (Andrey Shmakin) RUSSIA Russian Academy of Sciences, Institute of Water Problems (Yevgeniy Gusev, Olga Nasonova)

12. 10/8 9/8 1 1/8 3 3 12/8 9/8 10/8 F2 1 4/8 1 2/8 F1 F2 F2 F1 F1 MOSCEM Algorithm 2 2 2 F2 F1