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Variables Details
: (EM-374)
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EM Identity and Description
| EM-374 | |
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Document Author
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The Natural Capital Project |
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Document Year
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2015 |
Variable General Info
Amount of carbon in the form of woody biomass, typically removed from the parcel over the course of a harvest period ?Comment:This variable is part of the optional harvested wood products submodel. This amount should only include the portion of the wood’s carbon that is removed from the parcel (e.g., the carbon in the wood delivered to a saw mill). In other words, the slash and other waste from a wood harvest should be ignored because the model assumes that its carbon content is lost to the atmosphere instantly (the “cur” at the end of this attribute is used to relate it to the “current” LULC map). |
Average carbon density of the wood removed ?Comment:This variable is part of the optional harvested wood products submodel. The carbon density in the harvested wood (MgC Mg-1of dry wood). Typically, the statistic ranges between 0.43 and 0.55 (see table 4.3 of IPCC (2006)). If C_den_cur is not known for a parcel set it equal to 0.5. |
Average decay rate (half-life) of products made from the wood harvested ?Comment:This variable is part of the optional harvested wood products submodel. The half-life of wood products harvested, measured in years. |
Average tree volume per ton of wood removed (biomass expansion conversion factor) ?Comment:This variable is part of the optional harvested wood products submodel. An expansion factor that translates the mass of harvested wood into volume of harvested wood (Biomass Conversion Expansion Factor). The expansion factor is measured in Mgof dry wood per m3 of wood and is a function of stand type and stand age. If you do not have data on this expansion factor you can use the BCEFR row in table 4.5 of IPCC (2006). Otherwise, set this expansion factor equal to 1 for each parcel. |
Frequency of harvest periods ?Comment:This variable is part of the optional harvested wood products submodel. The frequency, in years, with which the Cut_cur amount is harvested. If the value is 1 then the Cut_cur amount is removed annually from the parcel, if 5 then every 5 years, etc. |
Land use/land cover class ?Comment:LULC is a class variable that determines the values for the four potential carbon pools; aboveground biomass, belowground biomass, soil, and dead organic matter. The inclusion of optional future scenarios (_fut) in the model can alter the LULC distribution and thus future carbon pools. Future scenarios are required for the model to generate carbon sequestration. |
Parcel ID ?Comment:This variable is part of the optional harvested wood products submodel. Unique identifying code for each polygon harvested for wood currently or in the future. |
Start date (year) for wood harvests in the parcel ?Comment:This variable is part of the optional harvested wood products submodel. The first year the carbon removed from a forest will be accounted for in the HWP pool. The first year should coincide with a year in which wood was actually harvested from the parcel. |
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Variable ID
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7600 | 7604 | 7603 | 7605 | 7602 | 7594 | 7599 | 7601 |
| Cut | C_den | Decay | BCEF | Freq | LULC | FID | Start | |
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Qualitative-Quantitative
variable.detail.continuousCategoricalHelp
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Quantitative (Cardinal Only) | Quantitative (Cardinal Only) | Quantitative (Cardinal Only) | Quantitative (Cardinal Only) | Quantitative (Cardinal Only) | Qualitative (Class, Rating or Ranking) | Qualitative (Class, Rating or Ranking) | Qualitative (Class, Rating or Ranking) |
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Cardinal-Ordinal
variable.detail.cardinalOrdinalHelp
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Cardinal | Cardinal | Cardinal | Cardinal | Cardinal | Non-Ordinal | Non-Ordinal | Non-Ordinal |
| Mg C ha^-1 | Mg C Mg^-1of dry wood | years | Mg dry wood m^-3 of wood | years | Not applicable | Not applicable | Not applicable |
Variable Typology
Amount of carbon in the form of woody biomass, typically removed from the parcel over the course of a harvest period ?Comment:This variable is part of the optional harvested wood products submodel. This amount should only include the portion of the wood’s carbon that is removed from the parcel (e.g., the carbon in the wood delivered to a saw mill). In other words, the slash and other waste from a wood harvest should be ignored because the model assumes that its carbon content is lost to the atmosphere instantly (the “cur” at the end of this attribute is used to relate it to the “current” LULC map). |
Average carbon density of the wood removed ?Comment:This variable is part of the optional harvested wood products submodel. The carbon density in the harvested wood (MgC Mg-1of dry wood). Typically, the statistic ranges between 0.43 and 0.55 (see table 4.3 of IPCC (2006)). If C_den_cur is not known for a parcel set it equal to 0.5. |
Average decay rate (half-life) of products made from the wood harvested ?Comment:This variable is part of the optional harvested wood products submodel. The half-life of wood products harvested, measured in years. |
Average tree volume per ton of wood removed (biomass expansion conversion factor) ?Comment:This variable is part of the optional harvested wood products submodel. An expansion factor that translates the mass of harvested wood into volume of harvested wood (Biomass Conversion Expansion Factor). The expansion factor is measured in Mgof dry wood per m3 of wood and is a function of stand type and stand age. If you do not have data on this expansion factor you can use the BCEFR row in table 4.5 of IPCC (2006). Otherwise, set this expansion factor equal to 1 for each parcel. |
Frequency of harvest periods ?Comment:This variable is part of the optional harvested wood products submodel. The frequency, in years, with which the Cut_cur amount is harvested. If the value is 1 then the Cut_cur amount is removed annually from the parcel, if 5 then every 5 years, etc. |
Land use/land cover class ?Comment:LULC is a class variable that determines the values for the four potential carbon pools; aboveground biomass, belowground biomass, soil, and dead organic matter. The inclusion of optional future scenarios (_fut) in the model can alter the LULC distribution and thus future carbon pools. Future scenarios are required for the model to generate carbon sequestration. |
Parcel ID ?Comment:This variable is part of the optional harvested wood products submodel. Unique identifying code for each polygon harvested for wood currently or in the future. |
Start date (year) for wood harvests in the parcel ?Comment:This variable is part of the optional harvested wood products submodel. The first year the carbon removed from a forest will be accounted for in the HWP pool. The first year should coincide with a year in which wood was actually harvested from the parcel. |
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Predictor-Intermediate-Response
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Predictor |
Predictor |
Predictor |
Predictor |
Predictor |
Predictor |
Predictor |
Predictor |
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Predictor Variable Type
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Time- or Space-varying Variable |
Time- or Space-varying Variable |
Time- or Space-varying Variable |
Time- or Space-varying Variable |
Time- or Space-varying Variable |
Time- or Space-varying Variable |
Time- or Space-varying Variable |
Time- or Space-varying Variable |
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Response Variable Type
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Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
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Data Source/Type
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Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
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Variable Classification Hierarchy
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5. Ecosystem Attributes and Potential Supply of Ecosystem Goods and Services |
5. Ecosystem Attributes and Potential Supply of Ecosystem Goods and Services |
6. Non-monetary Indicators of Human Demand, Use or Benefit of Ecosystem Goods and Services |
5. Ecosystem Attributes and Potential Supply of Ecosystem Goods and Services |
4. Human-Produced Stressor or Enhancer of Ecosystem Goods and Services Production |
2. Land Surface (or Water Body) Cover, Use, Substrate, or Metric |
N. Not classified |
4. Human-Produced Stressor or Enhancer of Ecosystem Goods and Services Production |
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--Chemical (C, N, P, sediment/particulate) characteristics of ecosystem components |
--Chemical (C, N, P, sediment/particulate) characteristics of ecosystem components |
--Demand for or use of provisioning services-Materials |
--CICES categories: Ecosystem goods and services - or landscape-level indices of suitability to supply EGS |
--Harvest activities and related ecological disturbance (except pollutant release) |
--Land use/land cover type or dominant habitat type |
--Harvest activities and related ecological disturbance (except pollutant release) |
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----Carbon-related characteristics of ecosystem components |
----Carbon-related characteristics of ecosystem components |
----Fibers and other materials from plants, algae and animals for direct use or processing |
----Suitability to supply provisioning services-Materials |
----Timber and wild plant harvest activities and disturbance |
----Other, multiple, unspecified or unclear |
----Timber and wild plant harvest activities and disturbance |
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------Carbon accumulation by terrestrial or aquatic ecosystem components |
------Carbon presence (in terrestrial or aquatic ecosystem components) |
------Fibers and other materials from plants, algae and animals for direct use or processing |
Variable Spatial Characteristics
Amount of carbon in the form of woody biomass, typically removed from the parcel over the course of a harvest period ?Comment:This variable is part of the optional harvested wood products submodel. This amount should only include the portion of the wood’s carbon that is removed from the parcel (e.g., the carbon in the wood delivered to a saw mill). In other words, the slash and other waste from a wood harvest should be ignored because the model assumes that its carbon content is lost to the atmosphere instantly (the “cur” at the end of this attribute is used to relate it to the “current” LULC map). |
Average carbon density of the wood removed ?Comment:This variable is part of the optional harvested wood products submodel. The carbon density in the harvested wood (MgC Mg-1of dry wood). Typically, the statistic ranges between 0.43 and 0.55 (see table 4.3 of IPCC (2006)). If C_den_cur is not known for a parcel set it equal to 0.5. |
Average decay rate (half-life) of products made from the wood harvested ?Comment:This variable is part of the optional harvested wood products submodel. The half-life of wood products harvested, measured in years. |
Average tree volume per ton of wood removed (biomass expansion conversion factor) ?Comment:This variable is part of the optional harvested wood products submodel. An expansion factor that translates the mass of harvested wood into volume of harvested wood (Biomass Conversion Expansion Factor). The expansion factor is measured in Mgof dry wood per m3 of wood and is a function of stand type and stand age. If you do not have data on this expansion factor you can use the BCEFR row in table 4.5 of IPCC (2006). Otherwise, set this expansion factor equal to 1 for each parcel. |
Frequency of harvest periods ?Comment:This variable is part of the optional harvested wood products submodel. The frequency, in years, with which the Cut_cur amount is harvested. If the value is 1 then the Cut_cur amount is removed annually from the parcel, if 5 then every 5 years, etc. |
Land use/land cover class ?Comment:LULC is a class variable that determines the values for the four potential carbon pools; aboveground biomass, belowground biomass, soil, and dead organic matter. The inclusion of optional future scenarios (_fut) in the model can alter the LULC distribution and thus future carbon pools. Future scenarios are required for the model to generate carbon sequestration. |
Parcel ID ?Comment:This variable is part of the optional harvested wood products submodel. Unique identifying code for each polygon harvested for wood currently or in the future. |
Start date (year) for wood harvests in the parcel ?Comment:This variable is part of the optional harvested wood products submodel. The first year the carbon removed from a forest will be accounted for in the HWP pool. The first year should coincide with a year in which wood was actually harvested from the parcel. |
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Spatial Extent Area
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Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
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Spatially Distributed?
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Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
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Observations Spatially Patterned?
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No | No | No | No | No | Yes | No | No |
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Spatial Grain Type
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Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | area, for pixel or radial feature | Not applicable | Not applicable |
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Spatial Grain Size
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Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | application specific | Not applicable | Not applicable |
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Spatial Density
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Application specific | Application specific | Application specific | Application specific | Application specific | Not applicable | Application specific | Application specific |
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EnviroAtlas URL
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Carbon Storage by Tree Biomass | Hectares of cotton crops | GAP Ecological Systems | GAP Ecological Systems |
Variable Temporal Characteristics
Amount of carbon in the form of woody biomass, typically removed from the parcel over the course of a harvest period ?Comment:This variable is part of the optional harvested wood products submodel. This amount should only include the portion of the wood’s carbon that is removed from the parcel (e.g., the carbon in the wood delivered to a saw mill). In other words, the slash and other waste from a wood harvest should be ignored because the model assumes that its carbon content is lost to the atmosphere instantly (the “cur” at the end of this attribute is used to relate it to the “current” LULC map). |
Average carbon density of the wood removed ?Comment:This variable is part of the optional harvested wood products submodel. The carbon density in the harvested wood (MgC Mg-1of dry wood). Typically, the statistic ranges between 0.43 and 0.55 (see table 4.3 of IPCC (2006)). If C_den_cur is not known for a parcel set it equal to 0.5. |
Average decay rate (half-life) of products made from the wood harvested ?Comment:This variable is part of the optional harvested wood products submodel. The half-life of wood products harvested, measured in years. |
Average tree volume per ton of wood removed (biomass expansion conversion factor) ?Comment:This variable is part of the optional harvested wood products submodel. An expansion factor that translates the mass of harvested wood into volume of harvested wood (Biomass Conversion Expansion Factor). The expansion factor is measured in Mgof dry wood per m3 of wood and is a function of stand type and stand age. If you do not have data on this expansion factor you can use the BCEFR row in table 4.5 of IPCC (2006). Otherwise, set this expansion factor equal to 1 for each parcel. |
Frequency of harvest periods ?Comment:This variable is part of the optional harvested wood products submodel. The frequency, in years, with which the Cut_cur amount is harvested. If the value is 1 then the Cut_cur amount is removed annually from the parcel, if 5 then every 5 years, etc. |
Land use/land cover class ?Comment:LULC is a class variable that determines the values for the four potential carbon pools; aboveground biomass, belowground biomass, soil, and dead organic matter. The inclusion of optional future scenarios (_fut) in the model can alter the LULC distribution and thus future carbon pools. Future scenarios are required for the model to generate carbon sequestration. |
Parcel ID ?Comment:This variable is part of the optional harvested wood products submodel. Unique identifying code for each polygon harvested for wood currently or in the future. |
Start date (year) for wood harvests in the parcel ?Comment:This variable is part of the optional harvested wood products submodel. The first year the carbon removed from a forest will be accounted for in the HWP pool. The first year should coincide with a year in which wood was actually harvested from the parcel. |
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Temporal Extent
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Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
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Temporally Distributed?
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Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
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Regular Temporal Grain?
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Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
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Temporal Grain Size Value
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1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
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Temporal Grain Size Units
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Year | Year | Year | Year | Year | Year | Year | Year |
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Temporal Density
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Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
Variable Values
Amount of carbon in the form of woody biomass, typically removed from the parcel over the course of a harvest period ?Comment:This variable is part of the optional harvested wood products submodel. This amount should only include the portion of the wood’s carbon that is removed from the parcel (e.g., the carbon in the wood delivered to a saw mill). In other words, the slash and other waste from a wood harvest should be ignored because the model assumes that its carbon content is lost to the atmosphere instantly (the “cur” at the end of this attribute is used to relate it to the “current” LULC map). |
Average carbon density of the wood removed ?Comment:This variable is part of the optional harvested wood products submodel. The carbon density in the harvested wood (MgC Mg-1of dry wood). Typically, the statistic ranges between 0.43 and 0.55 (see table 4.3 of IPCC (2006)). If C_den_cur is not known for a parcel set it equal to 0.5. |
Average decay rate (half-life) of products made from the wood harvested ?Comment:This variable is part of the optional harvested wood products submodel. The half-life of wood products harvested, measured in years. |
Average tree volume per ton of wood removed (biomass expansion conversion factor) ?Comment:This variable is part of the optional harvested wood products submodel. An expansion factor that translates the mass of harvested wood into volume of harvested wood (Biomass Conversion Expansion Factor). The expansion factor is measured in Mgof dry wood per m3 of wood and is a function of stand type and stand age. If you do not have data on this expansion factor you can use the BCEFR row in table 4.5 of IPCC (2006). Otherwise, set this expansion factor equal to 1 for each parcel. |
Frequency of harvest periods ?Comment:This variable is part of the optional harvested wood products submodel. The frequency, in years, with which the Cut_cur amount is harvested. If the value is 1 then the Cut_cur amount is removed annually from the parcel, if 5 then every 5 years, etc. |
Land use/land cover class ?Comment:LULC is a class variable that determines the values for the four potential carbon pools; aboveground biomass, belowground biomass, soil, and dead organic matter. The inclusion of optional future scenarios (_fut) in the model can alter the LULC distribution and thus future carbon pools. Future scenarios are required for the model to generate carbon sequestration. |
Parcel ID ?Comment:This variable is part of the optional harvested wood products submodel. Unique identifying code for each polygon harvested for wood currently or in the future. |
Start date (year) for wood harvests in the parcel ?Comment:This variable is part of the optional harvested wood products submodel. The first year the carbon removed from a forest will be accounted for in the HWP pool. The first year should coincide with a year in which wood was actually harvested from the parcel. |
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| Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | |
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Min Value
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Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
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Max Value
variable.detail.estHelp
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Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
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Other Value Type
variable.detail.natureOtherEstHelp
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Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
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Other Value
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Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
Variable Variability and Sensitivity
Amount of carbon in the form of woody biomass, typically removed from the parcel over the course of a harvest period ?Comment:This variable is part of the optional harvested wood products submodel. This amount should only include the portion of the wood’s carbon that is removed from the parcel (e.g., the carbon in the wood delivered to a saw mill). In other words, the slash and other waste from a wood harvest should be ignored because the model assumes that its carbon content is lost to the atmosphere instantly (the “cur” at the end of this attribute is used to relate it to the “current” LULC map). |
Average carbon density of the wood removed ?Comment:This variable is part of the optional harvested wood products submodel. The carbon density in the harvested wood (MgC Mg-1of dry wood). Typically, the statistic ranges between 0.43 and 0.55 (see table 4.3 of IPCC (2006)). If C_den_cur is not known for a parcel set it equal to 0.5. |
Average decay rate (half-life) of products made from the wood harvested ?Comment:This variable is part of the optional harvested wood products submodel. The half-life of wood products harvested, measured in years. |
Average tree volume per ton of wood removed (biomass expansion conversion factor) ?Comment:This variable is part of the optional harvested wood products submodel. An expansion factor that translates the mass of harvested wood into volume of harvested wood (Biomass Conversion Expansion Factor). The expansion factor is measured in Mgof dry wood per m3 of wood and is a function of stand type and stand age. If you do not have data on this expansion factor you can use the BCEFR row in table 4.5 of IPCC (2006). Otherwise, set this expansion factor equal to 1 for each parcel. |
Frequency of harvest periods ?Comment:This variable is part of the optional harvested wood products submodel. The frequency, in years, with which the Cut_cur amount is harvested. If the value is 1 then the Cut_cur amount is removed annually from the parcel, if 5 then every 5 years, etc. |
Land use/land cover class ?Comment:LULC is a class variable that determines the values for the four potential carbon pools; aboveground biomass, belowground biomass, soil, and dead organic matter. The inclusion of optional future scenarios (_fut) in the model can alter the LULC distribution and thus future carbon pools. Future scenarios are required for the model to generate carbon sequestration. |
Parcel ID ?Comment:This variable is part of the optional harvested wood products submodel. Unique identifying code for each polygon harvested for wood currently or in the future. |
Start date (year) for wood harvests in the parcel ?Comment:This variable is part of the optional harvested wood products submodel. The first year the carbon removed from a forest will be accounted for in the HWP pool. The first year should coincide with a year in which wood was actually harvested from the parcel. |
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Variability Expression Given?
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Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
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Variability Metric
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None | None | None | None | None | None | None | None |
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Variability Value
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None | None | None | None | None | None | None | None |
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Variability Units
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None | None | None | None | None | None | None | None |
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Resampling Used?
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Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
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Variability Expression Used in Modeling?
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Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
Variable Operational Validation (Response Variables only)
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Variable ID
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Validated?
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Validation Approach (within, between, etc.)
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Validation Quality (Qual/Quant)
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Validation Method (Stat/Deviance)
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Validation Metric
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Validation Value
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Validation Units
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Use of Measured Response Data
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