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1
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- Jeffrey Walker
- Department of Civil and Environmental Engineering
- The University of Melbourne
- http://www.civenv.unimelb.edu.au/~jwalker
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2
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- Early warning systems
- Flood prediction infiltration
- Socio-economic activities
- Agriculture yield forecasting, management (pesticides etc), sediment
transport
- Water management irrigation
- Policy planning
- Drought relief
- Global change
- Weather and climate
- Evapotranspiration latent and sensible heat
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3
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4
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- Knowledge of soil moisture has a greater impact on the predictability of
summertime precipitation over land at mid-latitudes than Sea Surface
Temperature (SST).
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5
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- Same forcing and initial conditions but different predictions of soil
moisture!
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6
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7
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8
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9
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10
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11
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- Observational Data Sets
- NCAR Northern Hemisphere Sea Level Pressure
- 01/1899 present; 5 x 5
degrees
- Climate Research Unit (University of East Anglia) Temperature and
Precipitation
- 01/01 - 12/98; 0.5 x 0.5 degrees
- Center for Climatic Research (University of Delaware) Terrestrial
Temperature and Precipitation
- 01/50 - 12/96 ; 0.5 x 0.5 degree
- Global Precipitation Climatology Project (GPCP)
- 01/86 - 03/95; 2.5 x 2.5 degree
- Langley Eight Year Shortwave and Longwave Surface Radiation Budget
- 07/83 - 06/91 - in process of being extended; 2.5 x 2.5 degree
- Re-Analysis Atmospheric Forcing Data Sets
- ECMWF Re-analysis Advanced Global Data
- 4x/day, 01/79 - 12/93
- 1.125 degrees (Gaussian)
- NCEP/NCAR Re-analysis
- 4x/day, 01/48 12/99
- 2.5 x 2.5 degrees
- Bias Correct Using Monthly Mean Observational Data Sets
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12
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13
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14
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15
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16
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17
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18
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19
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20
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21
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22
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23
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24
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25
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- Combination of:
- Land surface modelling
- Near-surface soil moisture remote sensing
- Streamflow measurement
- Changes in earths gravity field
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Notes