En-en adult card 12 carbon sinks - Revision history

Laurent Wargon at 20:20, 19 February 2023

2023-02-19T20:20:29Z

← Older revision		Revision as of 22:20, 19 February 2023
Line 31:		Line 31:
	===Causes===		===Causes===
	*[[En-en_adult_card_7_co2_emissions\|CO2 Emissions]]		*[[En-en_adult_card_7_co2_emissions\|CO2 Emissions]]
	*[[En-~~en_adult_card_42_weakening_gulf_stream~~\|~~Weakening Gulf Stream~~]]		*[[En-en_adult_card_42_thermohaline_circulation\|Thermohaline Circulation]]

	===Consequences===		===Consequences===

Karen Schmitt: Structure change

2021-10-30T13:03:43Z

Structure change

← Older revision		Revision as of 15:03, 30 October 2021
Line 1:		Line 1:
	{{Card		==Card #12: Carbon Sinks==
	~~\|number=~~12		<center>
	~~\|version~~=~~adult~~
	~~\|title~~=~~Carbon Sinks~~
	}}

	== Explanation ==		[[File:En-en_adult_card_12_front.png\|400px]]

			Half of the CO<sub>2</sub> we emit every year is absorbed by carbon sinks:

			- ¼ by vegetation via photosynthesis

			- ¼ by the oceans

			The remaining half stays in the atmosphere.

			</center>

			==Explanation==
	The original IPCC graph represents both CO<sub>2</sub> emissions and carbon sinks. The Climate Fresk has chosen to split it in two to show where CO<sub>2</sub> comes from and where it goes. This is why the two cards are symmetrical: every year, the CO<sub>2</sub> emitted by humankind has to go somewhere. Any CO<sub>2</sub> that is not absorbed by the other carbon sinks remains in the atmosphere.		The original IPCC graph represents both CO<sub>2</sub> emissions and carbon sinks. The Climate Fresk has chosen to split it in two to show where CO<sub>2</sub> comes from and where it goes. This is why the two cards are symmetrical: every year, the CO<sub>2</sub> emitted by humankind has to go somewhere. Any CO<sub>2</sub> that is not absorbed by the other carbon sinks remains in the atmosphere.

	The text at the back of the card gives approximate absorption rates. The more detailed percentages are:		The text at the back of the card gives approximate absorption rates. The more detailed percentages are:

	* 27.9% for the ocean		*27.9% for the ocean
	* 28.8% for photosynthesis<ref>[https://www.ipcc.ch/site/assets/uploads/2018/03/WG1AR5+SummaryVolume+FINAL+FRENCH.pdf Page 51 of IPCC's fifth technical summary report (French)]</ref>.		*28.8% for photosynthesis<ref>[https://www.ipcc.ch/site/assets/uploads/2018/03/WG1AR5+SummaryVolume+FINAL+FRENCH.pdf Page 51 of IPCC's fifth technical summary report (French)]</ref>.

	== Facilitation tips ==		==Facilitation tips ==
	This card is to be mirrored with the [[En-en adult card 7 co2 emissions\|CO<sub>2</sub> emissions]] card. To help the players figure this out, we can show them the card and ask "Can you see anything weird about this card?". Very often they notice that the legend is written upside-down. We can then tell them that it is a puzzle to be solved and that the answer is on the table. If the players do not figure it out, they can be given some clues:		This card is to be mirrored with the [[En-en adult card 7 co2 emissions\|CO<sub>2</sub> emissions]] card. To help the players figure this out, we can show them the card and ask "Can you see anything weird about this card?". Very often they notice that the legend is written upside-down. We can then tell them that it is a puzzle to be solved and that the answer is on the table. If the players do not figure it out, they can be given some clues:

	* What is the type of representation? A graph		*What is the type of representation? A graph
	* What type of graph? A "filled" curve		*What type of graph? A "filled" curve
	* What is the legend? The same as for CO<sub>2</sub> emissions.		*What is the legend? The same as for CO<sub>2</sub> emissions.
	==Correction==		==Correction ==
	===Causes===		===Causes===
	*[[En-en_adult_card_7_co2_emissions\|CO2 Emissions]]		*[[En-en_adult_card_7_co2_emissions\|CO2 Emissions]]
	* [[En-en_adult_card_42_weakening_gulf_stream\|Weakening Gulf Stream]]		*[[En-en_adult_card_42_weakening_gulf_stream\|Weakening Gulf Stream]]

	=== Consequences ===		===Consequences===
	*[[En-en_adult_card_11_concentration_of_co2\|Concentration of CO2]]		*[[En-en_adult_card_11_concentration_of_co2\|Concentration of CO2]]
	*[[En-en_adult_card_24_ocean_acidification\|Ocean Acidification]]		*[[En-en_adult_card_24_ocean_acidification\|Ocean Acidification]]

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

	=== Other causes ===		===Other causes===
	*[[En-en adult card 6 deforestation\|Deforestation]] Players often think that deforestation reduces carbon sinks. In reality, the impact is minimal because deforested areas represent a very small part of the total forest area. On the other hand, the CO<sub>2</sub> emitted is very important.		* [[En-en adult card 6 deforestation\|Deforestation]] Players often think that deforestation reduces carbon sinks. In reality, the impact is minimal because deforested areas represent a very small part of the total forest area. On the other hand, the CO<sub>2</sub> emitted is very important.
	*[[En-en adult card 8 agriculture\|Agriculture]] It doesn't matter if this link is not made, but it is true that agriculture can improve storage capacity through photosynthesis. This is the 0.4% principle (if we increased the soil's capacity to sequester carbon by even 0.4%, we would have a significant impact on CO<sub>2</sub>).		*[[En-en adult card 8 agriculture\|Agriculture]] It doesn't matter if this link is not made, but it is true that agriculture can improve storage capacity through photosynthesis. This is the 0.4% principle (if we increased the soil's capacity to sequester carbon by even 0.4%, we would have a significant impact on CO<sub>2</sub>).

	=== Other consequences ===		===Other consequences===
	*[[En-en adult card 32 decline agricultural yields\|Decline in agricultural yields]] Studies have shown that yields increase with increased CO<sub>2</sub>, but that the nutrient content of vegetables is reduced as a result, because trace elements are not more abundant when yields increase.		*[[En-en adult card 32 decline agricultural yields\|Decline in agricultural yields]] Studies have shown that yields increase with increased CO<sub>2</sub>, but that the nutrient content of vegetables is reduced as a result, because trace elements are not more abundant when yields increase.

	== Wrong links==		==Wrong links==
	===Wrong consequences===		===Wrong consequences===
	*[[En-en adult card 14 energy budget\|Energy budget]] The idea here is not to say there is no link between these two cards, but to make sure they are not mixed up. The carbon sinks card tells us where the carbon goes. The energy budget card tells us where the excess energy goes. Both distribute something, but not the same thing. To make it even more confusing, the atmosphere and the ocean are present in both.		*[[En-en adult card 14 energy budget\|Energy budget]] The idea here is not to say there is no link between these two cards, but to make sure they are not mixed up. The carbon sinks card tells us where the carbon goes. The energy budget card tells us where the excess energy goes. Both distribute something, but not the same thing. To make it even more confusing, the atmosphere and the ocean are present in both.

	==To go further==		==To go further==
Line 48:		Line 57:
	It can be added that the atmospheric concentration has increased sharply in years with an El Niño phenomenon because it makes it difficult for vegetation to absorb carbon<ref>[https://www.globalcarbonproject.org/carbonbudget/19/files/GCP_CarbonBudget_2019.pdf#page=48 The Global Carbon Project, 2019]</ref>.		It can be added that the atmospheric concentration has increased sharply in years with an El Niño phenomenon because it makes it difficult for vegetation to absorb carbon<ref>[https://www.globalcarbonproject.org/carbonbudget/19/files/GCP_CarbonBudget_2019.pdf#page=48 The Global Carbon Project, 2019]</ref>.

	===Carbon sinks capacity===		===Carbon sinks capacity ===
	[https://jancovici.com/changement-climatique/gaz-a-effet-de-serre-et-cycle-du-carbone/les-puits-de-carbone-ne-vont-ils-pas-absorber-le-surplus-de-co2/ Jean-Marc Jancovici’s web site - Won't "carbon sinks" absorb excess CO<sub>2</sub>? (French)]		[https://jancovici.com/changement-climatique/gaz-a-effet-de-serre-et-cycle-du-carbone/les-puits-de-carbone-ne-vont-ils-pas-absorber-le-surplus-de-co2/ Jean-Marc Jancovici’s web site - Won't "carbon sinks" absorb excess CO<sub>2</sub>? (French)]

Laurent Wargon: /* Causes */

2021-10-24T15:56:00Z

Causes

← Older revision		Revision as of 17:56, 24 October 2021
Line 22:		Line 22:
	===Causes===		===Causes===
	*[[En-en_adult_card_7_co2_emissions\|CO2 Emissions]]		*[[En-en_adult_card_7_co2_emissions\|CO2 Emissions]]
			* [[En-en_adult_card_42_weakening_gulf_stream\|Weakening Gulf Stream]]

	=== Consequences ===		=== Consequences ===
	*[[En-en_adult_card_11_concentration_of_co2\|Concentration of CO2]]		*[[En-en_adult_card_11_concentration_of_co2\|Concentration of CO2]]

X4resilience: replaced 'Climate Collage" by "Climate Fresk" throughout this page

2021-07-06T18:18:14Z

replaced 'Climate Collage" by "Climate Fresk" throughout this page

← Older revision		Revision as of 20:18, 6 July 2021
Line 6:		Line 6:

	== Explanation ==		== Explanation ==
	The original IPCC graph represents both CO<sub>2</sub> emissions and carbon sinks. The Climate ~~Collage~~ has chosen to split it in two to show where CO<sub>2</sub> comes from and where it goes. This is why the two cards are symmetrical: every year, the CO<sub>2</sub> emitted by humankind has to go somewhere. Any CO<sub>2</sub> that is not absorbed by the other carbon sinks remains in the atmosphere.		The original IPCC graph represents both CO<sub>2</sub> emissions and carbon sinks. The Climate Fresk has chosen to split it in two to show where CO<sub>2</sub> comes from and where it goes. This is why the two cards are symmetrical: every year, the CO<sub>2</sub> emitted by humankind has to go somewhere. Any CO<sub>2</sub> that is not absorbed by the other carbon sinks remains in the atmosphere.

	The text at the back of the card gives approximate absorption rates. The more detailed percentages are:		The text at the back of the card gives approximate absorption rates. The more detailed percentages are:

Karen Schmitt at 14:30, 16 April 2021

2021-04-16T14:30:43Z

← Older revision		Revision as of 16:30, 16 April 2021
Line 19:		Line 19:
	* What type of graph? A "filled" curve		* What type of graph? A "filled" curve
	* What is the legend? The same as for CO<sub>2</sub> emissions.		* What is the legend? The same as for CO<sub>2</sub> emissions.


	==Correction==		==Correction==
	===Causes===		===Causes===
Line 37:		Line 35:
	*[[En-en adult card 32 decline agricultural yields\|Decline in agricultural yields]] Studies have shown that yields increase with increased CO<sub>2</sub>, but that the nutrient content of vegetables is reduced as a result, because trace elements are not more abundant when yields increase.		*[[En-en adult card 32 decline agricultural yields\|Decline in agricultural yields]] Studies have shown that yields increase with increased CO<sub>2</sub>, but that the nutrient content of vegetables is reduced as a result, because trace elements are not more abundant when yields increase.

	== To go further ==		== Wrong links==
			===Wrong consequences===
			*[[En-en adult card 14 energy budget\|Energy budget]] The idea here is not to say there is no link between these two cards, but to make sure they are not mixed up. The carbon sinks card tells us where the carbon goes. The energy budget card tells us where the excess energy goes. Both distribute something, but not the same thing. To make it even more confusing, the atmosphere and the ocean are present in both.

			==To go further==

	=== Variation in photosynthesis ===		===Variation in photosynthesis===
	On this card, we can see that in some years photosynthesis drops to 0, and varies greatly from one year to another. The explanation comes from the fact that the residual carbon sink is calculated from the remaining value of the other variables<ref>[https://www.ipcc.ch/site/assets/uploads/2018/03/WG1AR5_SummaryVolume_FINAL_FRENCH.pdf#page=66 Page 66 of IPCC's Fifth report summary - Working group #1 (French)]</ref>. This is why negative values are sometimes found. In this graph, emissions and their distribution only include flows that have varied since 1750, without the natural CO<sub>2</sub> flows, such as CO<sub>2</sub> degassing from lakes, rivers and oceans. However, the IPCC does not clearly explain why such a variation can be read on the graph.		On this card, we can see that in some years photosynthesis drops to 0, and varies greatly from one year to another. The explanation comes from the fact that the residual carbon sink is calculated from the remaining value of the other variables<ref>[https://www.ipcc.ch/site/assets/uploads/2018/03/WG1AR5_SummaryVolume_FINAL_FRENCH.pdf#page=66 Page 66 of IPCC's Fifth report summary - Working group #1 (French)]</ref>. This is why negative values are sometimes found. In this graph, emissions and their distribution only include flows that have varied since 1750, without the natural CO<sub>2</sub> flows, such as CO<sub>2</sub> degassing from lakes, rivers and oceans. However, the IPCC does not clearly explain why such a variation can be read on the graph.

	It can be added that the atmospheric concentration has increased sharply in years with an El Niño phenomenon because it makes it difficult for vegetation to absorb carbon<ref>[https://www.globalcarbonproject.org/carbonbudget/19/files/GCP_CarbonBudget_2019.pdf#page=48 The Global Carbon Project, 2019]</ref>.		It can be added that the atmospheric concentration has increased sharply in years with an El Niño phenomenon because it makes it difficult for vegetation to absorb carbon<ref>[https://www.globalcarbonproject.org/carbonbudget/19/files/GCP_CarbonBudget_2019.pdf#page=48 The Global Carbon Project, 2019]</ref>.

	=== Carbon sinks capacity ===		===Carbon sinks capacity===
	[https://jancovici.com/changement-climatique/gaz-a-effet-de-serre-et-cycle-du-carbone/les-puits-de-carbone-ne-vont-ils-pas-absorber-le-surplus-de-co2/ Jean-Marc Jancovici’s web site - Won't "carbon sinks" absorb excess CO<sub>2</sub>? (French)]		[https://jancovici.com/changement-climatique/gaz-a-effet-de-serre-et-cycle-du-carbone/les-puits-de-carbone-ne-vont-ils-pas-absorber-le-surplus-de-co2/ Jean-Marc Jancovici’s web site - Won't "carbon sinks" absorb excess CO<sub>2</sub>? (French)]

	== References ==		==References==
	<references />		<references />

	[[fr:Fr-fr_adulte_carte_12_puits_de_carbone]]		[[fr:Fr-fr_adulte_carte_12_puits_de_carbone]]

Karen Schmitt: Minor corrections

2021-04-05T14:41:22Z

Minor corrections

← Older revision		Revision as of 16:41, 5 April 2021
Line 4:		Line 4:
	\|title=Carbon Sinks		\|title=Carbon Sinks
	}}		}}

	~~== Correction==~~
	~~===Causes===~~
	* [[En-en_adult_card_7_co2_emissions\|CO2 Emissions]]
	~~=== Consequences ===~~
	* [[En-en_adult_card_11_concentration_of_co2\|Concentration of CO2]]
	* [[En-en_adult_card_24_ocean_acidification\|Ocean Acidification]]

	== Explanation ==		== Explanation ==
Line 26:		Line 19:
	* What type of graph? A "filled" curve		* What type of graph? A "filled" curve
	* What is the legend? The same as for CO<sub>2</sub> emissions.		* What is the legend? The same as for CO<sub>2</sub> emissions.


			==Correction==
			===Causes===
			*[[En-en_adult_card_7_co2_emissions\|CO2 Emissions]]
			=== Consequences ===
			*[[En-en_adult_card_11_concentration_of_co2\|Concentration of CO2]]
			*[[En-en_adult_card_24_ocean_acidification\|Ocean Acidification]]

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

	=== Other causes ===		=== Other causes ===
	[[En-en adult card 6 deforestation\|Deforestation]] Players often think that deforestation reduces carbon sinks. In reality, the impact is minimal because deforested areas represent a very small part of the total forest area. On the other hand, the CO<sub>2</sub> emitted is very important.		*[[En-en adult card 6 deforestation\|Deforestation]] Players often think that deforestation reduces carbon sinks. In reality, the impact is minimal because deforested areas represent a very small part of the total forest area. On the other hand, the CO<sub>2</sub> emitted is very important.
			*[[En-en adult card 8 agriculture\|Agriculture]] It doesn't matter if this link is not made, but it is true that agriculture can improve storage capacity through photosynthesis. This is the 0.4% principle (if we increased the soil's capacity to sequester carbon by even 0.4%, we would have a significant impact on CO<sub>2</sub>).
	[[En-en adult card 8 agriculture\|Agriculture]] It doesn't matter if this link is not made, but it is true that agriculture can improve storage capacity through photosynthesis. This is the 0.4% principle (if we increased the soil's capacity to sequester carbon by even 0.4%, we would have a significant impact on CO<sub>2</sub>).

	=== Other consequences ===		=== Other consequences ===
	[[En-en adult card 32 decline agricultural yields\|Decline in agricultural yields]] Studies have shown that yields increase with increased CO<sub>2</sub>, but that the nutrient content of vegetables is reduced as a result, because trace elements are not more abundant when yields increase.		*[[En-en adult card 32 decline agricultural yields\|Decline in agricultural yields]] Studies have shown that yields increase with increased CO<sub>2</sub>, but that the nutrient content of vegetables is reduced as a result, because trace elements are not more abundant when yields increase.

	== To go further ==		== To go further ==

Ouahcene at 12:12, 5 April 2021

2021-04-05T12:12:13Z

← Older revision		Revision as of 14:12, 5 April 2021
Line 4:		Line 4:
	\|title=Carbon Sinks		\|title=Carbon Sinks
	}}		}}

			== Correction==
			===Causes===
			* [[En-en_adult_card_7_co2_emissions\|CO2 Emissions]]
			=== Consequences ===
			* [[En-en_adult_card_11_concentration_of_co2\|Concentration of CO2]]
			* [[En-en_adult_card_24_ocean_acidification\|Ocean Acidification]]

	== Explanation ==		== Explanation ==
Line 22:		Line 29:
	== Other possible links ==		== Other possible links ==

	=== ~~Causes~~ ===		=== Other causes ===
	[[En-en adult card 6 deforestation\|Deforestation]] Players often think that deforestation reduces carbon sinks. In reality, the impact is minimal because deforested areas represent a very small part of the total forest area. On the other hand, the CO<sub>2</sub> emitted is very important.		[[En-en adult card 6 deforestation\|Deforestation]] Players often think that deforestation reduces carbon sinks. In reality, the impact is minimal because deforested areas represent a very small part of the total forest area. On the other hand, the CO<sub>2</sub> emitted is very important.

	[[En-en adult card 8 agriculture\|Agriculture]] It doesn't matter if this link is not made, but it is true that agriculture can improve storage capacity through photosynthesis. This is the 0.4% principle (if we increased the soil's capacity to sequester carbon by even 0.4%, we would have a significant impact on CO<sub>2</sub>).		[[En-en adult card 8 agriculture\|Agriculture]] It doesn't matter if this link is not made, but it is true that agriculture can improve storage capacity through photosynthesis. This is the 0.4% principle (if we increased the soil's capacity to sequester carbon by even 0.4%, we would have a significant impact on CO<sub>2</sub>).

	=== ~~Consequences~~ ===		=== Other consequences ===
	[[En-en adult card 32 decline agricultural yields\|Decline in agricultural yields]] Studies have shown that yields increase with increased CO<sub>2</sub>, but that the nutrient content of vegetables is reduced as a result, because trace elements are not more abundant when yields increase.		[[En-en adult card 32 decline agricultural yields\|Decline in agricultural yields]] Studies have shown that yields increase with increased CO<sub>2</sub>, but that the nutrient content of vegetables is reduced as a result, because trace elements are not more abundant when yields increase.

Karen Schmitt: Minor corrections

2021-02-13T09:51:14Z

Minor corrections

← Older revision		Revision as of 11:51, 13 February 2021
Line 6:		Line 6:

	== Explanation ==		== Explanation ==
	The original IPCC graph represents both ~~CO2~~ emissions and carbon sinks. The Climate Collage has chosen to split it in two to show where ~~CO2~~ comes from and where it goes. This is why the two cards are symmetrical: every year, the ~~CO2~~ emitted by ~~man~~ has to go somewhere. Any ~~CO2~~ that is not absorbed by the carbon sinks remains in the atmosphere.		The original IPCC graph represents both CO<sub>2</sub> emissions and carbon sinks. The Climate Collage has chosen to split it in two to show where CO<sub>2</sub> comes from and where it goes. This is why the two cards are symmetrical: every year, the CO<sub>2</sub> emitted by humankind has to go somewhere. Any CO<sub>2</sub> that is not absorbed by the other carbon sinks remains in the atmosphere.

	The text at the back of the card gives approximate absorption rates. The more detailed percentages are :		The text at the back of the card gives approximate absorption rates. The more detailed percentages are:

	* 27.9% for the ocean		* 27.9% for the ocean
Line 14:		Line 14:

	== Facilitation tips ==		== Facilitation tips ==
	This card is to be mirrored with the [[En-en adult card 7 co2 emissions\|~~CO2~~ emissions]] card. To ~~make~~ the ~~participants find it~~, we can show them the card and ask "Do you see anything weird on this card?". Very often ~~participants~~ notice that the legend is written upside down. We can then tell them that it is a puzzle to be solved and that the answer is on the table. ~~In case~~ the ~~participants~~ do not ~~find~~ it, they can be given clues:		This card is to be mirrored with the [[En-en adult card 7 co2 emissions\|CO<sub>2</sub> emissions]] card. To help the players figure this out, we can show them the card and ask "Can you see anything weird about this card?". Very often they notice that the legend is written upside-down. We can then tell them that it is a puzzle to be solved and that the answer is on the table. If the players do not figure it out, they can be given some clues:

	* What is the type of representation? A graph		* What is the type of representation? A graph
	* What type of graph? A "filled" curve		* What type of graph? A "filled" curve
	* What is the legend? The same as for ~~CO2~~ emissions.		* What is the legend? The same as for CO<sub>2</sub> emissions.

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

	=== Causes ===		=== Causes ===
	[[En-en adult card 6 deforestation\|Deforestation]] ~~Participants~~ often think that deforestation reduces carbon sinks. In reality, the impact is minimal because deforested areas represent a very small part of the total forest area. On the other hand, the ~~CO2~~ emitted is very important.		[[En-en adult card 6 deforestation\|Deforestation]] Players often think that deforestation reduces carbon sinks. In reality, the impact is minimal because deforested areas represent a very small part of the total forest area. On the other hand, the CO<sub>2</sub> emitted is very important.

	[[En-en adult card 8 agriculture\|Agriculture]] It doesn't matter if this link is not made, but it is true that agriculture can improve storage capacity through photosynthesis. This is the 4 ~~per 1000~~ principle (if we increased the soil's capacity to sequester carbon by even 4~~/1000~~, we would have a significant impact on ~~CO2~~).		[[En-en adult card 8 agriculture\|Agriculture]] It doesn't matter if this link is not made, but it is true that agriculture can improve storage capacity through photosynthesis. This is the 0.4% principle (if we increased the soil's capacity to sequester carbon by even 0.4%, we would have a significant impact on CO<sub>2</sub>).

	=== Consequences ===		=== Consequences ===
	[[En-en adult card 32 decline agricultural yields\|Decline in agricultural yields]] Studies have shown that yields increase with increased ~~CO2~~, but that the nutrient content of vegetables is reduced as a result~~. Indeed~~, trace elements are not more abundant when yields increase.		[[En-en adult card 32 decline agricultural yields\|Decline in agricultural yields]] Studies have shown that yields increase with increased CO<sub>2</sub>, but that the nutrient content of vegetables is reduced as a result, because trace elements are not more abundant when yields increase.

	== To go further ==		== To go further ==

	=== Variation in photosynthesis ===		=== Variation in photosynthesis ===
	On this card, we can see that in some years photosynthesis drops to 0, and varies greatly from one year to another. The explanation comes from the fact that the residual carbon sink is calculated from the remaining value of the other variables<ref>[https://www.ipcc.ch/site/assets/uploads/2018/03/WG1AR5_SummaryVolume_FINAL_FRENCH.pdf#page=66 Page 66 of IPCC's Fifth report summary - Working group #1 (French)]</ref>. This is why negative values are sometimes found. In this graph, emissions and their distribution only include flows that have varied since 1750, without the natural ~~CO2~~ flows, such as ~~the absorption of atmospheric CO2 from phasing out, the~~ degassing ~~of CO2~~ from lakes ~~and~~ rivers, and ~~the degassing of CO2 in the~~ oceans ~~from the carbon brought by rivers~~. However, the IPCC does not clearly explain why such a variation can be read on the graph.		On this card, we can see that in some years photosynthesis drops to 0, and varies greatly from one year to another. The explanation comes from the fact that the residual carbon sink is calculated from the remaining value of the other variables<ref>[https://www.ipcc.ch/site/assets/uploads/2018/03/WG1AR5_SummaryVolume_FINAL_FRENCH.pdf#page=66 Page 66 of IPCC's Fifth report summary - Working group #1 (French)]</ref>. This is why negative values are sometimes found. In this graph, emissions and their distribution only include flows that have varied since 1750, without the natural CO<sub>2</sub> flows, such as CO<sub>2</sub> degassing from lakes, rivers and oceans. However, the IPCC does not clearly explain why such a variation can be read on the graph.

	It can be added that the atmospheric concentration has increased sharply in years with an El Niño phenomenon because it makes it difficult for vegetation to absorb carbon<ref>[https://www.globalcarbonproject.org/carbonbudget/19/files/GCP_CarbonBudget_2019.pdf#page=48 The Global Carbon Project, 2019]</ref>.		It can be added that the atmospheric concentration has increased sharply in years with an El Niño phenomenon because it makes it difficult for vegetation to absorb carbon<ref>[https://www.globalcarbonproject.org/carbonbudget/19/files/GCP_CarbonBudget_2019.pdf#page=48 The Global Carbon Project, 2019]</ref>.

	=== Carbon sinks capacity ===		=== Carbon sinks capacity ===
	[https://jancovici.com/changement-climatique/gaz-a-effet-de-serre-et-cycle-du-carbone/les-puits-de-carbone-ne-vont-ils-pas-absorber-le-surplus-de-co2/ Jean-Marc ~~Jancovici’~~ web site - Won't "carbon sinks" absorb excess ~~CO2~~? (French)]		[https://jancovici.com/changement-climatique/gaz-a-effet-de-serre-et-cycle-du-carbone/les-puits-de-carbone-ne-vont-ils-pas-absorber-le-surplus-de-co2/ Jean-Marc Jancovici’s web site - Won't "carbon sinks" absorb excess CO<sub>2</sub>? (French)]

	== References ==		== References ==
	<references />		<references />

			[[fr:Fr-fr_adulte_carte_12_puits_de_carbone]]

Ouahcene: /* Explanation */

2021-02-03T20:46:55Z

Explanation

@@ Line 11: / Line 11: @@
 * 27.9% for the ocean
-* 28.8% for photosynthesis<ref>[./Https://www.ipcc.ch/site/assets/uploads/2018/03/WG1AR5&#x20;SummaryVolume&#x20;FINAL&#x20;FRENCH.pdf Page 51 of IPCC's fifth technical summary report (French)]</ref>.
+* 28.8% for photosynthesis<ref>[https://www.ipcc.ch/site/assets/uploads/2018/03/WG1AR5+SummaryVolume+FINAL+FRENCH.pdf Page 51 of IPCC's fifth technical summary report (French)]</ref>.
 == References ==
 <references />

Ouahcene: /* Explanation */

2021-02-03T18:37:57Z

Explanation

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	== Explanation ==		== Explanation ==
			The original IPCC graph represents both CO2 emissions and carbon sinks. The Climate Collage has chosen to split it in two to show where CO2 comes from and where it goes. This is why the two cards are symmetrical: every year, the CO2 emitted by man has to go somewhere. Any CO2 that is not absorbed by the carbon sinks remains in the atmosphere.

			The text at the back of the card gives approximate absorption rates. The more detailed percentages are :

			* 27.9% for the ocean
			* 28.8% for photosynthesis<ref>[./Https://www.ipcc.ch/site/assets/uploads/2018/03/WG1AR5 SummaryVolume FINAL FRENCH.pdf Page 51 of IPCC's fifth technical summary report (French)]</ref>.

			== References ==
			<references />