EcoService Models Library (ESML)
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Variables Details
: (EM-892)
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EM Identity and Description
EM-892 | |
Document Author
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McKane |
Document Year
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Variable General Info
Soil organic carbon (layer 1,2,3,4) ?Comment:In VELMA, users specify initial humus (soil organic matter) values (g C/m2) according to soil survey or other data, for example, NRCS soil survey map data. VELMA then calculates initial foc values and subsequent daily changes in foc in response to environmental and management drivers. VELMA calculates foc per soil layer per grid cell per day. |
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Variable ID
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22023 |
foc | |
Qualitative-Quantitative
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Quantitative (Cardinal Only) |
Cardinal-Ordinal
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Cardinal |
unitless (0-1) ?Comment:Fraction (0-1) = [(g soil humus carbon) / (g bulk soil) |
Variable Typology
Soil organic carbon (layer 1,2,3,4) ?Comment:In VELMA, users specify initial humus (soil organic matter) values (g C/m2) according to soil survey or other data, for example, NRCS soil survey map data. VELMA then calculates initial foc values and subsequent daily changes in foc in response to environmental and management drivers. VELMA calculates foc per soil layer per grid cell per day. |
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Predictor-Intermediate-Response
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Predictor |
Predictor Variable Type
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Time- or Space-varying Variable |
Response Variable Type
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Not applicable |
Data Source/Type
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Not applicable |
Variable Classification Hierarchy
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5. Ecosystem Attributes and Potential Supply of Ecosystem Goods and Services |
--Chemical (C, N, P, sediment/particulate) characteristics of ecosystem components |
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----Carbon-related characteristics of ecosystem components |
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------Carbon presence (in terrestrial or aquatic ecosystem components) |
Variable Spatial Characteristics
Soil organic carbon (layer 1,2,3,4) ?Comment:In VELMA, users specify initial humus (soil organic matter) values (g C/m2) according to soil survey or other data, for example, NRCS soil survey map data. VELMA then calculates initial foc values and subsequent daily changes in foc in response to environmental and management drivers. VELMA calculates foc per soil layer per grid cell per day. |
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Spatial Extent Area
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Not applicable |
Spatially Distributed?
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Yes |
Observations Spatially Patterned?
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Yes |
Spatial Grain Type
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area, for pixel or radial feature |
Spatial Grain Size
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user defined |
Spatial Density
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Not applicable |
EnviroAtlas URL
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Variable Temporal Characteristics
Soil organic carbon (layer 1,2,3,4) ?Comment:In VELMA, users specify initial humus (soil organic matter) values (g C/m2) according to soil survey or other data, for example, NRCS soil survey map data. VELMA then calculates initial foc values and subsequent daily changes in foc in response to environmental and management drivers. VELMA calculates foc per soil layer per grid cell per day. |
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Temporal Extent
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Not applicable |
Temporally Distributed?
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Yes |
Regular Temporal Grain?
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Yes |
Temporal Grain Size Value
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1 |
Temporal Grain Size Units
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Day |
Temporal Density
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Not applicable |
Variable Values
Soil organic carbon (layer 1,2,3,4) ?Comment:In VELMA, users specify initial humus (soil organic matter) values (g C/m2) according to soil survey or other data, for example, NRCS soil survey map data. VELMA then calculates initial foc values and subsequent daily changes in foc in response to environmental and management drivers. VELMA calculates foc per soil layer per grid cell per day. |
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Not applicable | |
Min Value
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Not applicable |
Max Value
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Not applicable |
Other Value Type
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Not applicable |
Other Value
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Not applicable |
Variable Variability and Sensitivity
Soil organic carbon (layer 1,2,3,4) ?Comment:In VELMA, users specify initial humus (soil organic matter) values (g C/m2) according to soil survey or other data, for example, NRCS soil survey map data. VELMA then calculates initial foc values and subsequent daily changes in foc in response to environmental and management drivers. VELMA calculates foc per soil layer per grid cell per day. |
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Variability Expression Given?
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Not applicable |
Variability Metric
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None |
Variability Value
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None |
Variability Units
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None |
Resampling Used?
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Not applicable |
Variability Expression Used in Modeling?
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Not applicable |
Variable Operational Validation (Response Variables only)
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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