SAHRA

Phoenix

Albuquerque

Tucson

Sevilleta

PILPS San Pedro - SevilletaPILPS San Pedro - Sevilleta

Lucky HillsKendall

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PILPS Semi Arid ExperimentPILPS Semi Arid ExperimentPILPS Semi Arid ExperimentPILPS Semi Arid Experiment

USA

Arizona New Mexico

Phoenix

Albuquerque

Kendall

Lucky Hills

Tucson

Sevilleta

L. Bastidas H. Gupta, B. Nijssen W. Emmerich E. Small

Sponsors

SAHRA

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Sevilleta

San PedroLocationsLocationsLocationsLocations

SiteLongitude

WestLatitude

NorthElevation[m.a.s.l.]

Precipitation[mm/year]

Temperature[C]

Lucky HillsShrubland

11003’05’’ 3144’37” 1372 340 18.6

KendallGrassland

10956’28” 3144’10” 1526 340 19.3

TucsonShrub/cacti

11149’48” 3213’01” 730 305 20.2

Sevilleta Grassland

10643’30” 3420’30” 1730 270 17.2

SevilletaShrubland

10644’39” 3420’05” 1776 270 16.9

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Sevilleta

San Pedro

1996 1997 1998 1999 2000

1996 1997 1998 1999 2000

Forcings

Outputs

Spin up PeriodData Supplied

CalibrationPeriod

Data Supplied

EvaluationPeriod

Data NOT supplied

2001 2002Forcings 2000

Outputs 2001 20022000

Forcings 19941993

Outputs 19941993

San Pedro Shrub & Grass

Sevilleta Shrub & Grass

Tucson Mixed Shrub & Cacti

Split Sample TestSplit Sample TestSplit Sample TestSplit Sample Test

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San PedroScience QuestionsScience QuestionsScience QuestionsScience Questions

1. What is the ability of the models to reproduce the water, energy, and carbon exchanges in semi-arid environments?

2. Are the current (usually single) representations of semi-arid lands in the models enough to reproduce the different environments that exist in those areas?

3. Does model calibration reduce the among-model range in the model simulations?

4. How much influence does the model parameterization have on the parameter estimations of “physically meaningful” parameters?

5. Do current carbon representations, developed for forests, properly reproduce carbon exchanges over vegetated arid lands?

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San PedroInformation to be suppliedInformation to be suppliedInformation to be suppliedInformation to be supplied

• 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.

Forcings

• Vegetation type • Vegetation cover fraction• Height of vegetation• Leaf Area Index• Surface albedo• Longwave emissivity

Ancillary Information

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Sevilleta

San PedroAnalysis onAnalysis onAnalysis onAnalysis on

Monthly meanMonthly mean

Daily meanDaily mean

Daily amplitudeDaily amplitude

Daily phaseDaily phase

Min and max of the diurnal cycleMin and max of the diurnal cycle

Values at each time stepValues at each time step

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Sevilleta

San Pedro

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Sevilleta

San PedroData HandlingData HandlingData HandlingData Handling

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Sevilleta

San PedroTimelineTimelineTimelineTimeline

June 2003, Submission of final experimental protocolJune 2003, Submission of final experimental protocol

August 27-29, 2003, Workshop for training of participants in the use of the August 27-29, 2003, Workshop for training of participants in the use of the multi-criteria proceduresmulti-criteria procedures

September 2003, Distribution of forcing data to the participants through September 2003, Distribution of forcing data to the participants through website website www.sahra.arizona.edu/pilpssanpedrowww.sahra.arizona.edu/pilpssanpedro

September 30, 2003, submission of model information and default September 30, 2003, submission of model information and default parameter sets used by the models for semi-arid areas.parameter sets used by the models for semi-arid areas.

October 31, 2003, Submission of default parameter simulationsOctober 31, 2003, Submission of default parameter simulations

November 1, 2003, Distribution of calibration dataNovember 1, 2003, Distribution of calibration data

January 31, 2004, Deadline for submission of results both ad-hoc and January 31, 2004, Deadline for submission of results both ad-hoc and multi-criteria calibrationsmulti-criteria calibrations

May 2004, Workshop for analysis of preliminary results. May 2004, Workshop for analysis of preliminary results.

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San PedroSo Far …So Far …So Far …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)

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Sevilleta

San PedroMOSCEM AlgorithmMOSCEM AlgorithmMOSCEM AlgorithmMOSCEM Algorithm

1

11

22

23 3

F1

F2

F1

F2

F1

F2

1/8

4/82/8

10/89/8

9/810/8

12/8

F1

F2

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Sevilleta

San Pedro