Difference between revisions of "En-en adult card 42 methane hydrates"

From Climate Fresk
Jump to navigation Jump to search
m
m (Minor corrections)
Line 6: Line 6:


== Explanation ==
== Explanation ==
Permafrost is a soil whose temperature remains below or equal to 0°C for at least two consecutive years<ref>[https://www.ipcc.ch/site/assets/uploads/2018/03/WG1AR5_SummaryVolume_FINAL_FRENCH.pdf#page=212 Glossary, Report 5, Working Group 1 (French)]</ref>.
The two last cards to be added to the Collage after card 40 are potentially violent feedback loops or "climate bombs" which, if triggered, would cause us to lose control over the climate for good.


Two cards were added after card 40: they are loops of potential violent feedback, "climate bombs", which if triggered, make us lose control over the climate for good.
Thermokarst are veritable bioreactors at the heart of the process of releasing frozen carbon: when the permafrost thaws, pieces of soil detach and fall into the water, bringing nutrients and carbon to the bacteria and plankton present in the sea, which degrade them into CO<sub>2</sub> (in the water layers near the surface) and methane or CH<sub>4</sub> (in the oxygen-deprived bottom).
 
Thermokarst are veritable bioreactors at the heart of the process of releasing frozen carbon: when the permafrost thaws, pieces of soil detach and fall into the water, bringing nutrients and carbon to the bacteria and plankton present in the sea, which degrade them into CO<sub>2</sub> (in the water layers near the surface) and methane or CH<sub>4</sub> (in the oxygen-deprived bottom)<ref>[https://lejournal.cnrs.fr/articles/pergelisol-le-piege-climatique CNRS The newspaper Permafrost, the climate trap (French)]</ref>.


== Other possible links ==
== Other possible links ==

Revision as of 20:36, 23 March 2021

Card #42: Methane Hydrates

Causes Consequences
Front of the card "Methane Hydrates"


The Gulf Stream is part of the ocean's thermohaline circulation. It could weaken in response to freshwater input from Greenland's melting ice sheet.
This could disrupt the water cycle even more and reduce the ocean's capacity to absorb more carbon and heat.

Explanation

The two last cards to be added to the Collage after card 40 are potentially violent feedback loops or "climate bombs" which, if triggered, would cause us to lose control over the climate for good.

Thermokarst are veritable bioreactors at the heart of the process of releasing frozen carbon: when the permafrost thaws, pieces of soil detach and fall into the water, bringing nutrients and carbon to the bacteria and plankton present in the sea, which degrade them into CO2 (in the water layers near the surface) and methane or CH4 (in the oxygen-deprived bottom).

Other possible links

Causes

Energy budget If we want to stay within the same logic of energy conservation, the thawing of the permafrost should be linked to the energy budget.

References