Why is CO 2 accumulating in the atmosphere and what can be done about it ?

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Presentation transcript:

Why is CO 2 accumulating in the atmosphere and what can be done about it ?

Questions to consider: 1.Explain the annual periodicity of the above curve? 2.What inferences can you make about CO2 concentrations for the next 50 years ? The graph below shows carbon dioxide concentrations in the atmosphere in parts per million (ppm) from 1958 until the present.

ATMOSPHERIC CO 2 Stored CO 2 – Fossil Fuels Human use Process Direct Air to Sea Exchange (dissolution) Process Plants and Animals Oceans Process 1. Review Processes

Basic principle: Accumulation happens when inputs are greater than outputs For carbon cycle: -Inputs to atmosphere = sources -Outputs from atmosphere = sinks (land and ocean)

Oil Oceans Human Fuels The atmosphere Coal Natural Gas 0 Before human civilization... Plants, animals and soil

Plants, animals and soil Oil Oceans Human Fuels The atmosphere Coal Natural Gas 7 In the year Gt/yr from deforestation More CO 2 dissolved in oceans 2 Gt/yr from regrowth of forests

9092 Oil Oceans Human Fuels The atmosphere Coal Natural Gas What numbers must be present in the empty boxes to make the movement of carbon into and out of the atmosphere balance? Plants, animals and soil

9092 Oil Oceans Human Fuels The atmosphere Coal Natural Gas Reduce deforestation Maintain regrowth of forests Reduce emissions from energy use One possible solution Plants, animals and soil

Movement of Carbon in every year during the years Figure 4. This shows the concentration of carbon dioxide in the atmosphere in parts per million (ppm) if levels are stabilized by Figure 3. This shows the movement of carbon in every year for the years 2020 – The numbers stand for billions of tons of carbon. Concentration stabilization scenario 1224

Challenge #1 - How to make this fun, relevant, and not depressing

CO 2 electricity

materials Sustainability will provide new opportunities Understanding how the earth works and how humans fit in is cool You are not a bad person if you drive a car; you are just a contemporary human. What will a future human drive? There will still be electric guitars in the future. Individual behavior matters. Collective behavior matters more. We will figure this out. Enjoy the ride. Be part of it.

Challenge #2 Finding Solutions  How can we stabilize carbon emissions over the next 50 years to maintain Carbon emissions instead of continuing on our current path?