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  water pumped from underground aquifers

  for all the talk of "sequestering" CO2 how can we ignore the "de-sequestration" of water from underground aquifers? Here's the bottom line-- the high-end estimate of annual CO2 discharge is 25 billion tons per year. However, the annual rate of groundwater "de-sequestration" i.e. the net amout of water pumped to the surface and not returned underground is 160 billion tons per year. Even though all of this water is now in the atmopheric system, i.e. the lower troposphere, let us just assume that half, or 80 billion tons a year ends up as extra atmospheric water vapor. since water vapor has about ten times the "greenhouse effect" as CO2, this is the CO2 equvalent of 800 Billion tons!! Or about 32 times the impact of CO2 increase!! Water aquifer info is from various sources, including USGS and USAID.On 'Climate scientists dodge the subject of water vapor'--No, they really don't posted 2 years, 4 months ago 4 Responses