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Animated diagram of the Earth's Carbon Cycle and how it has changed over time. Carbon, in various forms including CO2 and organic materials, is continually exchanged between the atmosphere, oceans, and biosphere. However, human activities have perturbed the carbon cycle.pic.twitter.com/TvHgi2CwUD
First frame of the animation, showing the estimated carbon stocks and flows before human intervention. Each year large amounts of carbon move between reservoirs, but over time a natural equilibrium was achieved so that the total carbon in each group stays about constant.pic.twitter.com/Grogd9ohQz
For thousands of years, the pre-industrial carbon cycle was in balance and a nearly constant level of CO2 was maintained in the atmosphere. Then humans discovered the usefulness of fossil fuels, and we started to add large amounts of carbon to the atmosphere.pic.twitter.com/tytfqsUVUG
Final frame of the animation, showing the fossil fuels we have burned and the effect that this has had on the stocks and flows of carbon. Via the carbon cycle, the fossil carbon we burned is now dispersed into the atmosphere, ocean, and biosphere.pic.twitter.com/Jp08cvqkKG
Over a few hundred years, more of the emitted carbon will find its way into the oceans. If we stop burning large amounts of fossil fuels, this would allow CO2 levels in the atmosphere to decline somewhat.
However, the main mechanism for getting carbon back into the Earth is through sediment formation. That's a very slow process. Natural processes will likely take >100,000 years for the extra carbon we've added by burning fossil fuels to go back into the Earth.
PS. The animation is also available on YouTube, which may be easier to share and looks a bit crisper:https://www.youtube.com/watch?v=dwVsD9CiokY …
I take it the carbon and oxygen locked in human bodies was added to the biosphere tally? Why is the biosphere showing a relatively stable figure for the period 1970 to present if 5 billion people was added since the 70s, which must represent a considerable cash of C and O.
5 billion people collectively constitute about 0.06 GtC. There are about 3,000 billion trees on Earth, and each weighs much more than a human. Humans are very impactful, but in terms of carbon mass we are only a very small portion of the total.
3 trillion trees, right?
Yes. Though I avoided saying "trillion" because that confuses some people.
Thank you Robert, this is awesome! Is it available on a webpage/somewhere it could be embedded in a slide (with attribution of course) for teaching? Thanks!
It is also on YouTube: https://www.youtube.com/watch?v=dwVsD9CiokY … If you want a copy of the original file, please DM me with an email address.
Great , but what about carbon in the soil? Why isn't in the picture?
Soil carbon is considered part of the biosphere.
Do you know the @lal_rattan publications . Is it accurate?
I believe that this representations is missing the plant -soil nexus where only the living carbon in the soil is much more important than the above ground biomass Moreover the farmers we have to understand how improve this carbon sink getting more fertility and enviro servicespic.twitter.com/nFP8oBtud9
Definitively I believe
as you are ( rightly) differentiating the carbon cycle in the hydrosphere either more you have to do the same with the soil and above ground biosphere
The soil -plant nexus is really the most powerful wheel in the natural C cycle
#NaturalClimateSolutions
Nice illustration is there a link to the video? This would be a great teaching tool.
Here is a copy on YouTube, if that is easier to use: https://www.youtube.com/watch?v=dwVsD9CiokY … If you send me a DM, I can also send you the animation file directly.
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