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Tom Goreau, "The Tijuca Story: Reforestation and the Biotic Pump"
1. RESTORING CARBON, WATER,
AND TEMPERATURE CYCLES
Tom Goreau
Biodiversity for a Livable Climate
Conference on Restoring Water Cycles
To Reverse Global Warming
October 17 2015
6. CARBON, WATER,
TEMPERATURE
• HIGH SOIL CARBON CAUSES HIGH WATER
RETENTION, MORE FERTILE SOILS
• THERE ARE MANY WAYS TO MANAGE SOILS TO
INCREASE SOIL CARBON
• SOIL CARBON COMES IN MANY FORMS, RANGES
THA LAST FROM VERY SHORT TO VERY LONG
TIMES
• BLACK SOIL CARBON LASTS LONGEST
7. WHOLE WATERSHED MANAGEMENT
• PREVENT SOIL EROSION
• RECYCLE NUTRIENTS ON LAND
• KEEP THEM OUT OF RIVERS, LAKES, AND
THE OCEAN WHERE THEY CAUSE
HARMFULLY ALGAE BLOOM AND KILL
CORAL REEFS AND FISHERIES
13. WATER & TEMPERATURE
• MORE THAN HALF OF SOLAR RADIATION ON LAND
EVAPORATES WATER, ABSORBING HUGE
AMOUNTS OF HEAT AND LOWERING LAND
TEMPERATURE
• ABOUT 60% OF RAIN WATER ON LAND IS
RETURNED TO THE ATMOSPHERE, RATHER THAN
RUNNING OFF
• 80-90% OF THIS IS PLANT TRANSPIRATION RATHER
THAN PHYSICAL EVAPORATION
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19. RESTORE WETLANDS
• SWAMPS, BOGS, MARSHES, SALT MARSHES,
SEAGRASSES, & MANGROVES ARE MAJOR CARBON
SINKS, BUILDING SOILS THAT CAN BE NEARLY PURE
ORGANIC CARBON.
• WE ARE NOW RAPIDLY DESTROYING THEM BY
DRAINING, ADDING THE CARBON TO THE
ATMOSPHERE
• WE MUST REVERSE THIS COURSE
20. BEAVERS CONTROLLED NORTH AMERICAN HYDROLOGY
UNTIL HUNTERS DROVE THEM TO EXTINCTION, GREATLY
INCREASING SOIL EROSION & NUTRIENT LOSS
21. WATER & TEMPERATURE
• MORE THAN HALF OF SOLAR RADIATION ON LAND
EVAPORATES WATER, ABSORBING HUGE
AMOUNTS OF HEAT AND LOWERING LAND
TEMPERATURE
• ABOUT 60% OF WATER ON LAND IS RETURNED TO
THE ATMOSPHERE, RATHER THAN RUNNING OFF
• 80-90% OF THIS IS PLANT TRANSPIRATION RATHER
THAN PHYSICAL EVAPORATION
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24. GOREAU & DE MELLO, 1985
AMAZON RAINFOREST
BRAZIL
26. RESTORING VEGETATION RESTORES
WATER CYCLES
• INCREASES TRANSPIRATION, CAUSING MORE RAIN
• REDUCES SURFACE WATER RUNOFF, SOIL EROSION,
AND RUNOFF
• INCREASES RECHARGE OF GROUNDWATER AND
AQUIFERS BECAUSE WATER FLOWS DOWN ROOTS
INTO THE GROUND
• RESTORES SPRINGS AND STREAMS