Amazonian Water Balance

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Amazonian Water Balance

• Marcos Heil Costa
• Federal University of Viçosa
• Brazil

Second LBA Scientific Conference July 2002
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Contents

• Precipitation
• Evapotranspiration
• Runoff, discharge and floods
• Interannual/interdecadal variability
• Effects of changes in land use
• Potential effects of global warming

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1. Precipitation

• Annual mean

• Seasonal variability

Legates Wilmott (1990)
Costa Foley (GRL, 1998)
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2. Evapotranspiration
Shuttleworth (QJRMS, 1988)
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3. Runoff, discharge and floods
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3. Runoff, discharge and floods
Sippel et al. (Int. J. Rem. Sensing, 1998)
SSMR/Nimbus-7
Alsdorf et al. (Nature, 2000) Shuttle SAR
Birkett et al. (JGR, in press) TOPEX/POSEIDON
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3. Runoff, discharge and floods
Coe et al. (JGR, in press)
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3. Runoff, discharge and floods
River network - Costa et al. (JGR, in press)
Sinuosity - Costa et al. (JGR, in press)
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4. Interannual/interdecadal variability
Neutral
El Niño - Neutral
La Niña - Neutral
Wet season
Dry season
Foley et al. (GBC, in press CRU climate dataset)
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4. Interannual/interdecadal variability
River Discharge
Foley et al. (GBC, in press)
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4. Interannual/interdecadal variability
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Costa Foley (JGR, 1999)

• Botta et al. (GRL, 2002)

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5. Effects of changes in land use
IBGE 1995 agricultural census data Cardille et
al. (GBC, in press)
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2
1949
1999
1956 Construction of Brasilia
1995
1969
1979
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5. Effects of changes in land use
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5. Effects of changes in land use

•  

Costa Foley (J. Climate, 2000)
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6. Potential effects of global warming

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Costa Foley (J. Climate, 2000) NCAR GENESIS
GCM
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6. Potential effects of global warming
P2071-2100 P1961-1990 ()
Greenhouse gases sulfur aerosols
Greenhouse gases only (1 increase per year)
DJF
JJA
Giorgi et al. (IPCC, 2001)