Variable overview: Difference between revisions
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|mainlabel=Variable | |mainlabel=Variable | ||
|? DriverGroup = Model driver group | |? DriverGroup = Model driver group | ||
|? -HasInputVar = | |? -HasInputVar = Used_in | ||
|? HasDescription = Description | |? HasDescription = Description | ||
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{{#ask:[[Category:Variable]][[HasVariableType::model]] | {{#ask:[[Category:Variable]][[HasVariableType::model]] | ||
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|? -HasOutputVar = Output_of | |||
|? -HasInputVar = Used_in | |||
|? HasDescription = Description | |? HasDescription = Description | ||
|limit=30 | |limit=30 | ||
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==Parameters== | ==Parameters== |
Revision as of 19:27, 1 August 2013
Drivers
Variable | Model driver group | Used_in | Description |
---|---|---|---|
GDP per capita | Economic development | Energy supply and demand Agricultural economy Climate policy Emissions Energy demand Human development | Gross Domestic Product per capita, measured as the market value of all goods and services produced in a region in a year, and is used in the IMAGE framework as a generic indicator of economic activity. |
Labour supply | Economic development | Agricultural economy | Effective supply of labour input to support economic activities, taking into account the participation rate of age cohorts. |
Capital supply | Economic development | Agricultural economy | Capital available to replace depreciated stock and expand the stock to support economic growth. |
GDP per capita - grid | Economic development | Ecosystem services Nutrients Flood risks | Scaled down GDP per capita from country to grid level, based on population density. |
Private consumption | Economic development | Energy supply and demand Energy demand | Private consumption reflects expenditure on private household consumption. It is used in IMAGE as a driver of energy. |
GINI coefficient | Economic development | Human development | Measure of income disparity in a population. If all have the same income, GINI equals 1. The lower the GINI, the wider the gap between the lowest and highest income groups. |
Timber demand | Economic development | Forest management | Demand for roundwood and pulpwood per region. |
Sector value added | Economic development | Energy supply and demand Energy demand | Value Added for economic sectors: Industry (IVA), Services (SVA) and Agriculture (AVA). These variables are used in IMAGE to indicate economic activity. |
Built-up area - grid | Energy and land resources | Land cover and land use | Urban built-up area per grid cell, excluded from all biophysical modelling in IMAGE, increasing over time as a function of urban population and a country- and scenario-specific urban density curve. |
Energy resources | Energy and land resources | Energy supply and demand Energy supply | Volume of energy resource per carrier, region and supply cost class (determines depletion dynamics). |
Taxes and other additional costs | Environmental and other policies | Energy demand | Taxes on energy use, and other additional costs |
Adaptation level | Environmental and other policies | Climate policy | Level of adaptation to climate change , defined as the share of climate change damage avoided by adaptation. This level is be calculated by the model to minimise adaptation costs and residual damage, or set by the user. |
Energy policy | Environmental and other policies | Energy conversion | Policy to achieve energy system objectives, such as energy security and energy access. |
Climate target | Environmental and other policies | Climate policy | Climate target, defined in terms of concentration levels, radiative forcing, temperature targets, or cumulative emissions. |
Protected area - grid | Environmental and other policies | Land-use allocation Land cover and land use Terrestrial biodiversity Ecosystem services | Map of protected nature areas, limiting use of this area. |
Domestic climate policy | Environmental and other policies | Climate policy | Planned and/or implemented national climate and energy policies, such as taxes, feed-in tariffs, renewable targets, efficiency standards, that affect projected emission reduction. |
Equity principles | Environmental and other policies | Climate policy | General concepts of distributive justice or fairness used in effort sharing approaches. Three key equity principles are: Responsibility (historical contribution to warming); capability (ability to pay for mitigation); and equality (equal emissions allowances per capita). |
Air pollution policy | Environmental and other policies | Energy conversion | Air pollution policies set to reach emission reduction targets, represented in the model in the form of energy carrier and sector specific emission factors. |
Biofuel policy | Environmental and other policies | Agricultural economy | Policies to foster the use of biofuels in transport, such as financial incentives and biofuel mandates and obligations. |
Lifestyle parameters | Lifestyle parameters | Energy supply and demand Energy demand | Lifestyle parameters influence the relationship between economic activities and demand for energy. |
Preferences | Lifestyle parameters | Energy demand | Non-price factors determining market shares, such as preferences, environmental policies, infrastructure and strategic considerations, used for model calibration. |
Urban population fraction | Population projections | Human development | Urban/rural split of population. |
Population - grid | Population projections | Land-use allocation Nutrients Human development Flood risks | Number of people per gridcell (using downscaling). |
Population | Population projections | Energy supply and demand Agricultural economy Climate policy Energy demand | Number of people per region. |
Feed conversion | Technological change in agriculture and forestry | Livestock systems | Measure of an animal's efficiency in converting feed mass into the desired output such as meat and milk (for cattle, poultry, pigs, sheep and goats). |
Technological change (crops and livestocks) | Technological change in agriculture and forestry | Agricultural economy | Increase in productivity in crop production (yield/ha) and livestock production (carcass weight, offtake rate). |
Forest plantation demand | Technological change in agriculture and forestry | Forest management | Demand for forest plantation area. |
Increase in irrigated area - grid | Technological change in agriculture and forestry | Land-use allocation | Increase in irrigated area, often based on external projections (e.g., FAO). |
Harvest efficiency | Technological change in agriculture and forestry | Forest management | Fraction of harvested wood used as product, the remainder being left as residues. Specified per biomass pool and forestry management type. |
Production system mix | Technological change in agriculture and forestry | Livestock systems Nutrients | Livestock production is distributed over two systems for dairy and beef production (intensive: mixed and industrial; extensive: pastoral grazing), and to three systems for pigs (backyard, intermediate, intensive) and poultry (backyard, boilers, laying hens) with specific intensities, rations and feed conversion ratios. |
... further results |