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En-en adult card 11 concentration of co2: Difference between revisions
En-en adult card 11 concentration of co2 (view source)
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== Card #11: Concentration of CO<sub>2</sub> == | |||
<center> | |||
== Explanation == | [[File:En-en_adult_card_11_front.png|400px]] | ||
About half of CO<sub>2</sub> emissions are captured by natural carbon sinks. The other half remains in the atmosphere. The concentration of CO<sub>2</sub> | |||
in the air has increased from 280 to 415 ppm (parts per million) over the past 150 years. This is higher than at any point over the last three million years. | |||
</center> | |||
== Explanation== | |||
CO<sub>2</sub> measurements have been taken since 1958 in Hawaii, on Big Island, on the flanks of the Mauna Loa volcano. They were initiated by Charles Keeling. In the blue scenario (2°C) they increase until 2040-2050, then they decrease because emissions will have been reduced so much that natural sinks no longer absorb them. | |||
== Correction== | |||
===Causes=== | |||
* [[En-en_adult_card_12_carbon_sinks|Carbon Sinks]] | |||
=== Consequences === | |||
* [[En-en_adult_card_13_additional_greenhouse_effect|Additional Greenhouse Effect]] | |||
== Wrong links== | |||
===Wrong consequences=== | |||
*[[En-en adult card 12 carbon sinks|Carbon sinks]] It can be argued that CO<sub>2</sub> emissions take place before reaching carbon sinks. But the opposite link has our preference. | |||
*[[En-en adult card 24 ocean acidification|Ocean acidification]] Players often identify CO<sub>2</sub> concentration as a cause for ocean acidification. But it is more logical to link back to carbon sinks. | |||
==To go further== | |||
===CO<sub>2</sub> elimination=== | |||
The surplus CO<sub>2</sub> is permanently stored in the atmosphere (no chemical degradation process). There are only 2 physical processes: dissolution of CO<sub>2</sub> in the oceans, and synthesis of O<sub>2</sub> via photosynthesis (in the presence of photons). | |||
Therefore<ref>[https://www.ipcc.ch/site/assets/uploads/2018/02/WG1AR5_all_final.pdf#page=489 IPCC Climate Change 2013 Report]</ref>: | |||
*in 100 years' time, 40% of the surplus CO<sub>2</sub> released today will still remain in the atmosphere | |||
*in 1000 years' time, 20% of the surplus CO<sub>2</sub> emitted today will still remain in the atmosphere | |||
*in 10,000 years' time, 10% of the surplus CO<sub>2</sub> emitted today will still remain in the atmosphere. | |||
It is an almost irreversible process. | |||
===French emission factors=== | |||
In France, the main cause of CO<sub>2</sub> emissions has shifted from industry to transportation in 150 years. | |||
==References== | |||
<references /> | |||
[[fr:Fr-fr_adulte_carte_11_concentration_en_co2]] | |||