earth's carbon sinks and sources
DESCRIPTION
Illustration of how increasing manmade carbon pollution affects the Earth's ability to absorb carbon dioxide.TRANSCRIPT
Prior to the industrial revolution the planet was able to absorb greenhouse gases emitted by natural sources
VOLCANOES FIRESFORESTS OCEANSOCEANSLAKES & STREAMS
Natural CO2 Sinks
(Absorb CO2 from atmosphere)
Natural CO2 Emitters
(Release CO2 into atmosphere)
• Natural greenhouse gases: primarily carbon dioxide (CO2) and water vapor
• Main industrial greenhouse gas is CO2 from burning (combus@on) coal, oil and gas
• Coal has the highest carbon content of all fossil fuels
• CO2 from coal burning contributed slightly over 28% to atmospheric greenhouse gases in 2010. (hGp://www.c2es.org/energy/source/coal)
When we built dams and drained lakes and streams we eliminated a natural CO2 sink.
VOLCANOES FIRESFORESTS OCEANSOCEANS
Natural CO2 Sinks
(Absorb CO2 from atmosphere)
Natural CO2 Emitters
(Release CO2 into atmosphere)
CO2 is more soluble in fresh water than in salt water, but, by volume, lakes and streams are less effec@ve sinks than are oceans and rainforests.
After the industrial revolution we began to add excess carbon pollution into our atmosphere
primarily by burning coal and oil.
FORESTS OCEANSOCEANS VOLCANOES FIRESCARBON EMISSIONS
CO2 CO2
The commonly accepted onset of the Industrial Revolu@on is around 1850. That is when humans began to burn fossil fuels to generate power to drive machinery. (hGp://www.princeton.edu/~achaney/tmve/wiki100k/docs/[email protected]
Deforestation leaves the oceans as the major carbon sink.
OCEANSOCEANS VOLCANOES FIRESCARBON EMISSIONS
CO2 CO2
“Forests cover 31% of the land area on our planet. …Deforesta@on undermines this important carbon sink. It is es@mated that 15% of all greenhouse gas emissions are the result of deforesta@on.”(hGp://worldwildlife.org/threats/deforesta@on)
Vehicle emissions continue to add to the stress on the ocean’s ability to absorb CO2.
Excess CO2 is making our oceans acidic.
OCEANSOCEANS VOLCANOES FIRESCARBON EMISSIONSAUTOMOBILES
CO2 CO2
Ocean acidifica@on: • hGp://www.unc.edu/~lbuckley/GCE/uploads/Main/Doney%20et%20al%202009.pdf
• The oceans are Earth’s last, great defense against carbon pollu@on and they are being stressed—becoming warmer and acidic.
• Contrary to early popular beliefs, the oceans are not limitless.