Carbon sequestration - Revision history

Jonare at 08:10, 18 April 2024

2024-04-18T08:10:08Z

LarsSangstuvall: Added default carbon level in peatlands

2022-11-03T18:36:55Z

Added default carbon level in peatlands

JeanetteEggers at 13:13, 4 August 2022

2022-08-04T13:13:36Z

LarsSangstuvall at 10:47, 4 August 2022

2022-08-04T10:47:46Z

LarsSangstuvall: Translated Swedish version with minor adjustments.

2022-08-03T08:40:04Z

Translated Swedish version with minor adjustments.

LarsSangstuvall at 14:39, 2 August 2022

2022-08-02T14:39:18Z

LarsSangstuvall: Started an english version of Carbon sequestration.

2022-08-02T13:44:12Z

Started an english version of Carbon sequestration.

Peder: Created page with '{{Languages}} Category:Model'

2012-05-11T11:52:57Z

Created page with '{{Languages}} Category:Model'

New page

{{Languages}}
[[Category:Model]]

@@ Line 28: / Line 28: @@
 Litter fall is calculated based on standing woody biomass, unextracted biomass after forest management activities and parts - other than stems - of trees dead from natural mortality. Stump and root biomass is calculated using <ref name ="PeterssonStahl2006">{{:Bibliografi:PeterssonStahl2006}}</ref>. These models include roots thicker than 2 mm. Fine roots (< 2mm) are calculated internally using estimated relations between intermediate (2-5 mm) and fine (<2 mm) roots, but not presented as a result variable. No biomass functions for stumps and roots in young forests are currently available for use in Heureka.
-The [[:Q-model|Q-model]] is used to calculate the amount of carbon and nitrogen in the litter and soil layers on mineral soils, and to predict decomposition in different litter fractions. On ditched organic soils (peat), soil carbon decreases over time (using emission factors), while the soil carbon stock in unditched peatland remains constant (default 896 ton C/ha) over time.
+The [[:Q-model|Q-model]] is used to calculate the amount of carbon and nitrogen in the litter and soil layers on mineral soils, and to predict decomposition in different litter fractions. On ditched organic soils (peat), soil carbon decreases over time (using emission factors), while the soil carbon stock in unditched peatland remains constant (default 896 ton C/ha) over time. The model for peat has settings for boreal and temperate forests. A forest is considered boreal for [[:Definition:CountyCode|CountyCode]] 1-13.
 {|

@@ Line 28: / Line 28: @@
 Litter fall is calculated based on standing woody biomass, unextracted biomass after forest management activities and parts - other than stems - of trees dead from natural mortality. Stump and root biomass is calculated using <ref name ="PeterssonStahl2006">{{:Bibliografi:PeterssonStahl2006}}</ref>. These models include roots thicker than 2 mm. Fine roots (< 2mm) are calculated internally using estimated relations between intermediate (2-5 mm) and fine (<2 mm) roots, but not presented as a result variable. No biomass functions for stumps and roots in young forests are currently available for use in Heureka.
-The [[:Q-model|Q-model]] is used to calculate the amount of carbon and nitrogen in the litter and soil layers on mineral soils, and to predict decomposition in different litter fractions. On ditched organic soils (peat), soil carbon decreases over time (using emission factors), while the soil carbon stock in unditched peatland remains constant over time.
+The [[:Q-model|Q-model]] is used to calculate the amount of carbon and nitrogen in the litter and soil layers on mineral soils, and to predict decomposition in different litter fractions. On ditched organic soils (peat), soil carbon decreases over time (using emission factors), while the soil carbon stock in unditched peatland remains constant (default 896 ton C/ha) over time.
 {|

@@ Line 2: / Line 2: @@
 [[Category:Model]]
 {{DISPLAYTITLE:Carbon sequestration}}
-Heureka enables quantifying carbon pools in living and dead trees as well as soil, for each projection timestep (Figure 1). Ground layer carbon is not considered in Heureka at present. Changes in carbon stock over time depend on harvesting followed by extraction, emission via decomposition and capturing via photosynthesis/growth.
+Heureka enables quantifying carbon pools in living and dead trees as well as soil, for each projection timestep (Figure 1). Ground layer carbon is not considered in Heureka at present. Changes in carbon stock over time depent on harvesting followed by extraction, emission via decomposition and capturing via photosynthesis/growth.
 '''(1)''' Carbon stock in the '''above ground tree layer''' is calculated using single-tree biomass functions. In mature stands both <ref name = "Marklund1988">{{:Bibliografi:Marklund1988}}</ref> and <ref name = "Petersson1999">{{:Bibliografi:Petersson1999}}</ref> are available for usage in Heureka, whereas <ref name = "ClaessonEtAl2001">{{:Bibliografi:ClaessonEtAl2001}}</ref> is used for young stands. Conversion factors from biomass (dry matter) to carbon (percent of dry matter) are then used to estimate the carbon stock<ref name = "Skogsstyrelsen2000">{{:Bibliografi:Skogsstyrelsen2000}}</ref>.
@@ Line 23: / Line 23: @@
 Other broadleaf species are calculated using birch functions, calibrated for each species wood density relative to birch([http://sv.wikipedia.org/wiki/Tr%C3%A4slag]). Cut trees are removed from the tree layer and their felling residues (unextracted trees and parts) are transferred to the dead wood and/or soil carbon model, along with unextracted trees dead due to natural mortality.
-'''(2)''' Carbon stock in [[:Category:Dead Wood|'''dead wood''']] is a function of starting stock, supply of dead stem wood from natural mortality as well as unextracted cut stems and stem parts, and loss due to decomposition. If the initial dead wood stock is unknown the initial stock is simulated based on National Forest Inventory data (settings in control table Dead Wood). Decomposition of biomass is calculated using power functions (''e''<sup>-''kt''</sup>) where tree species-specific k-values can be adjusted in the control table.
+'''(2)''' Carbon stock in [[:Category:Dead Wood|'''dead wood''']] is a function of starting stock, supply of dead stem wood from natural mortality as well as unextracted cut stems and stem parts (e.g. high stumps), and loss due to decomposition. If the initial dead wood stock is unknown the initial stock is simulated based on National Forest Inventory data (settings in control table Dead Wood). Decomposition of biomass is calculated using power functions (''e''<sup>-''kt''</sup>) where tree species-specific k-values can be adjusted in the control table.
-'''(3)''' '''Soil carbon''' dynamics includes biomass stock, supply and loss in stumps, roots and litter.
+'''(3)''' '''Soil carbon''' dynamics on mineral soils include biomass stock, supply and loss in stumps, roots and litter.
 Litter fall is calculated based on standing woody biomass, unextracted biomass after forest management activities and parts - other than stems - of trees dead from natural mortality. Stump and root biomass is calculated using <ref name ="PeterssonStahl2006">{{:Bibliografi:PeterssonStahl2006}}</ref>. These models include roots thicker than 2 mm. Fine roots (< 2mm) are calculated internally using estimated relations between intermediate (2-5 mm) and fine (<2 mm) roots, but not presented as a result variable. No biomass functions for stumps and roots in young forests are currently available for use in Heureka.
-The [[:Q-model|Q-model]] is used to calculate the amount of carbon and nitrogen in the litter and soil layers, and to predict decomposition in different litter fractions.
+The [[:Q-model|Q-model]] is used to calculate the amount of carbon and nitrogen in the litter and soil layers on mineral soils, and to predict decomposition in different litter fractions. On ditched organic soils (peat), soil carbon decreases over time (using emission factors), while the soil carbon stock in unditched peatland remains constant over time.
 {|

@@ Line 21: / Line 21: @@
 |}
-Other broadleaf species are calculated using birch functions, calibrated for each species wood density relative to birch([http://sv.wikipedia.org/wiki/Tr%C3%A4slag]). Cut trees are removed from the tree layer and their felling residues (unextracted trees and parts) are transferred to the soil carbon model, along with unextracted trees dead due to natural mortality.
+Other broadleaf species are calculated using birch functions, calibrated for each species wood density relative to birch([http://sv.wikipedia.org/wiki/Tr%C3%A4slag]). Cut trees are removed from the tree layer and their felling residues (unextracted trees and parts) are transferred to the dead wood and/or soil carbon model, along with unextracted trees dead due to natural mortality.
-'''(2)''' Carbon stock in [[:Category:Dead Wood|'''dead wood''']] is a function of starting stock, supply of dead stem wood from natural mortality and loss due to decomposition. If the initial dead wood stock is unknown the initial stock is simulated based on National Forest Inventory data (settings in control table Dead Wood). Decomposition of biomass is calculated using power functions (''e''<sup>-''kt''</sup>) where tree species-specific k-values can be adjusted in the control table.
+'''(2)''' Carbon stock in [[:Category:Dead Wood|'''dead wood''']] is a function of starting stock, supply of dead stem wood from natural mortality as well as unextracted cut stems and stem parts, and loss due to decomposition. If the initial dead wood stock is unknown the initial stock is simulated based on National Forest Inventory data (settings in control table Dead Wood). Decomposition of biomass is calculated using power functions (''e''<sup>-''kt''</sup>) where tree species-specific k-values can be adjusted in the control table.
 '''(3)''' '''Soil carbon''' dynamics includes biomass stock, supply and loss in stumps, roots and litter.

@@ Line 4: / Line 4: @@
 Heureka enables quantifying carbon pools in living and dead trees as well as soil, for each projection timestep (Figure 1). Ground layer carbon is not considered in Heureka at present. Changes in carbon stock over time depend on harvesting followed by extraction, emission via decomposition and capturing via photosynthesis/growth.
-'''(1)''' Carbon stock in the above ground '''tree layer''' is calculated using single-tree biomass functions. In mature stands both <ref name = "Marklund1988">{{:Bibliografi:Marklund1988}}</ref> and <ref name = "Petersson1999">{{:Bibliografi:Petersson1999}}</ref> are available for usage in Heureka, whereas <ref name = "ClaessonEtAl2001">{{:Bibliografi:ClaessonEtAl2001}}</ref> is used for young stands. Conversion factors from biomass (dry matter) to carbon (percent of dry matter) are then used to estimate the carbon stock<ref name = "Skogsstyrelsen2000">{{:Bibliografi:Skogsstyrelsen2000}}</ref>.
+'''(1)''' Carbon stock in the '''above ground tree layer''' is calculated using single-tree biomass functions. In mature stands both <ref name = "Marklund1988">{{:Bibliografi:Marklund1988}}</ref> and <ref name = "Petersson1999">{{:Bibliografi:Petersson1999}}</ref> are available for usage in Heureka, whereas <ref name = "ClaessonEtAl2001">{{:Bibliografi:ClaessonEtAl2001}}</ref> is used for young stands. Conversion factors from biomass (dry matter) to carbon (percent of dry matter) are then used to estimate the carbon stock<ref name = "Skogsstyrelsen2000">{{:Bibliografi:Skogsstyrelsen2000}}</ref>.
 {| {{table}}
@@ Line 12: / Line 12: @@
 | align="left" style="background:#f0f0f0;"|'''Birch'''
 |-
-| '''Stem'''||48,0||48,8||49,0
+| '''Stem'''||48.0||48.8||49.0
 |-
-| '''Branch'''||50,8||51,2||49,0
+| '''Branch'''||50.8||51.2||49.0
 |-
-| '''Needles/leaves'''||48,6||51,2||49,0
+| '''Needles/leaves'''||48.6||51.2||49.0
 |-
+|
 |}
-To be translated:
+Other broadleaf species are calculated using birch functions, calibrated for each species wood density relative to birch([http://sv.wikipedia.org/wiki/Tr%C3%A4slag]). Cut trees are removed from the tree layer and their felling residues (unextracted trees and parts) are transferred to the soil carbon model, along with unextracted trees dead due to natural mortality.
-För övriga lövträdslag används björkfunktioner, med en kvotkalibrering av veddelar. Denna kvotkalibrering baseras på kvoten mellan trädslagets  och björkens veddensiteter ([http://sv.wikipedia.org/wiki/Tr%C3%A4slag]). Avverkade träd lämnar systemet. Avverkningsrester och delar från självdöda träd överförs till markmodellen som input till förnamodellen.
+'''(2)''' Carbon stock in [[:Category:Dead Wood|'''dead wood''']] is a function of starting stock, supply of dead stem wood from natural mortality and loss due to decomposition. If the initial dead wood stock is unknown the initial stock is simulated based on National Forest Inventory data (settings in control table Dead Wood). Decomposition of biomass is calculated using power functions (''e''<sup>-''kt''</sup>) where tree species-specific k-values can be adjusted in the control table.
-'''(2)''' Kolförekomst i [[:Category:Dead Wood|'''död ved''']] beror på ingående mängd, mortalitet och nedbrytning. Om mängden död ved inte har inventerats används defaultvärden som baseras på data från Riksskogstaxeringen (finns i kontrolltabellen Dead Wood). Nedbrytning av biomassa beräknas med exponentiell funktion (''e''<sup>-''kt''</sup>) där trädslagsvisa k-värdena kan ändras av användaren. Läs mer om hantering av död ved här: [[:Category:Dead Wood]]
+'''(3)''' '''Soil carbon''' dynamics includes biomass stock, supply and loss in stumps, roots and litter.
+Litter fall is calculated based on standing woody biomass, unextracted biomass after forest management activities and parts - other than stems - of trees dead from natural mortality. Stump and root biomass is calculated using <ref name ="PeterssonStahl2006">{{:Bibliografi:PeterssonStahl2006}}</ref>. These models include roots thicker than 2 mm. Fine roots (< 2mm) are calculated internally using estimated relations between intermediate (2-5 mm) and fine (<2 mm) roots, but not presented as a result variable. No biomass functions for stumps and roots in young forests are currently available for use in Heureka.
 {|
-|[[Image:CarbonBalance_sv.png|700px|thumb|left|Figur 1]]
+|[[Image:CarbonBalance_sv.png|700px|thumb|left|Figure 1]]
 |}
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← Older revision		Revision as of 13:44, 2 August 2022
Line 1:		Line 1:
−	{{Languages}}	+	{{Languages\|Carbon sequestration}}
	[[Category:Model]]		[[Category:Model]]
		+	{{DISPLAYTITLE:Carbon sequestration}}
		+	Heureka enables quantifying carbon pools in living and dead trees as well as soil, for each projection timestep (Figure 1). Ground layer carbon is not considered in Heureka at present. Changes in carbon stock over time depend on harvesting followed by extraction, emission via decomposition and capturing via photosynthesis/growth.
		+
		+	To be translated:
		+
		+	'''(1)''' För beräkning av kolförrådet i '''trädkiktets''' ovanjordsdelar används biomassafunktioner för enskilda träd. För äldre skog används antingen <ref name = "Marklund1988">{{:Bibliografi:Marklund1988}}</ref> eller <ref name = "Petersson1999">{{:Bibliografi:Petersson1999}}</ref>, beroende på vilken modell som användaren har valt. För ungskog används <ref name = "ClaessonEtAl2001">{{:Bibliografi:ClaessonEtAl2001}}</ref>. Utifrån beräknad mängd biomassa används omräkningstal från biomassa (torrsubstans) till kolmängd (procent av torrsubstans) enligt följande tabell<ref name = "Skogsstyrelsen2000">{{:Bibliografi:Skogsstyrelsen2000}}</ref>.
		+
		+	{\| {{table}}
		+	\| align="left" style="background:#f0f0f0;"\|'''Träddel'''
		+	\| align="left" style="background:#f0f0f0;"\|'''Gran'''
		+	\| align="left" style="background:#f0f0f0;"\|'''Tall'''
		+	\| align="left" style="background:#f0f0f0;"\|'''Björk'''
		+	\|-
		+	\| '''Stam'''\|\|48,0\|\|48,8\|\|49,0
		+	\|-
		+	\| '''Gren'''\|\|50,8\|\|51,2\|\|49,0
		+	\|-
		+	\| '''Barr/löv'''\|\|48,6\|\|51,2\|\|49,0
		+	\|-
		+	\|
		+	\|}
		+
		+	För övriga lövträdslag används björkfunktioner, med en kvotkalibrering av veddelar. Denna kvotkalibrering baseras på kvoten mellan trädslagets och björkens veddensiteter ([http://sv.wikipedia.org/wiki/Tr%C3%A4slag]). Avverkade träd lämnar systemet. Avverkningsrester och delar från självdöda träd överförs till markmodellen som input till förnamodellen.
		+
		+	'''(2)''' Kolförekomst i [[:Category:Dead Wood\|'''död ved''']] beror på ingående mängd, mortalitet och nedbrytning. Om mängden död ved inte har inventerats används defaultvärden som baseras på data från Riksskogstaxeringen (finns i kontrolltabellen Dead Wood). Nedbrytning av biomassa beräknas med exponentiell funktion (''e''<sup>-''kt''</sup>) där trädslagsvisa k-värdena kan ändras av användaren. Läs mer om hantering av död ved här: [[:Category:Dead Wood]]
		+
		+	'''(3)''' Kol i '''marken''' baseras på biomassa i stubbar, rötter och förna, och nedbrytning av dessa.
		+	Förnafall beräknas med utgångspunkt från stående biomassa, kvarlämnad biomassa efter avverkning, samt träddelar från självdöda träd. När det gäller självdöda träd ingår grenar, barr, stubbar och rötter, medan stamdelen, inklusive toppdelen av stammen, förs till död-ved poolen (se ovan). Biomassa i stubbar och rötter beräknas med <ref name ="PeterssonStahl2006">{{:Bibliografi:PeterssonStahl2006}}</ref>. Dessa funktioner inkluderar rötter ned till 2 mm. Rotförna från finrötter (< 2mm) beräknas internt i modellen med redovisas inte som resutlatvariabel i Heureka (TODO: INKLUDERA REFERENS TILL FÖRNAMODELLEN!). Beräkningen görs med omvandlingstal för relation mellan mellanrötter (2-5mm) och finrötter. I dagsläget finns inga biomassafunktioner för stubbar och rötter i ungskog.
		+
		+	Q-modellen används för att beräkna mängden kol (och kväve) i förna- och humusskikt, och räknar på olika nedbrytningsförlopp för olika förnafraktioner.
		+
		+
		+	{\|
		+	\|[[Image:CarbonBalance_sv.png\|700px\|thumb\|left\|Figur 1]]
		+	\|}
		+	<!--
		+
		+
		+	<references />