Comparison of Forcing Data:

NCC: NCC forcing dataset
GPCC: Global Preciptiation Climatology Centre
WFD: Watch Forcing Dataset
GSWP3: GSWP3 beta forcing dataset
Time period: 1990-1999 inclusive
Scale: Monthly

Total Precipitation	Surface Pressure	Specific Humidity	Wind Speed
Air Temperature	Shortwave Radiation	Longwave Radiation	Total Downward Radiation

Comparison of Global Simulations:

Model: MATSIRO with groundwater representation.

Time period: 2000-2007 inclusive

Spatial resolution: 1 deg
 

Precipitation (mm/mon)	Net Radiation (W/m2)	Evapotranspiration (mm/mon)
Soil Evaporation (mm/mon)	Transpiration (mm/mon)	Interception loss (mm/mon)
Total runoff (mm/mon)	Base Runoff (mm/mon)	Surface Runoff (mm/mon)

Evapotranspiration and Related Variables:

Since, the ET is significantly higher for GSWP3 compared to GPCC, a comparison of ET to precipitation ratio for simulations using NCC (1985-1999), GPCC (1979-2007), WFD (1958-2001), and GSWP3 (2000-2008) is presented here. Also, comparisons of LW down and SW down forcing for the same periods are also presented.

ET/Precipitation

LW down/ Total Downward Rad.

SW down/ Total Downward Rad.

Sensitivity Analysis:

This section presents the comparison of simulations for analyzing the sensitivity of simulations to changes in forcing variables. Two simulations (10% increase and decrease) were carried out for each variable except for air temperature. 

Legend: 

• GPCC: simulation using GPCC data
• Ori: Original GSWP3 forcing
• 110: Runs in which the forcing parameter has been increased by 10 %.
• 90: Runs in which the forcing parameter has been decreased by 10 %.
• LW: Downward longwave radiation
• PR: Precipitation
• PS: Surface pressure
• Q: Specific humidity
• SW: Downward shortwave radiation
• W: Wind velocity

Global and Regional Means:

Precipitation (km3/yr)	Total Runoff (km3/yr)	Evapotranspiration (km3/yr)
Soil Evaporation (km3/yr)	Transpiration (km3/yr)	Interception loss (km3/yr)

Basin Scale Comparison:

Comparison of seasonal cycles of variables for different sensitvity runs. Discharge simulation using TRIP has also been compared with GRDC observation.

Evapotranspiration (mm/mon)

Total Runoff (mm/mon)

River Discharge (mm/mon)

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