Variable overview
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Drivers
Model driver group | Variable | Used_in | Description |
---|---|---|---|
Economic development | Timber demand | Forest management | Demand for roundwood and pulpwood per region. |
Economic development | Sector value added | 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. |
Economic development | Labour supply | Agricultural economy | Effective supply of labour input to support economic activities, taking into account the participation rate of age cohorts. |
Economic development | GDP per capita | 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. |
Economic development | Capital supply | Agricultural economy | Capital available to replace depreciated stock and expand the stock to support economic growth. |
Economic development | GDP per capita - grid | Ecosystem services Nutrients Flood risks | Scaled down GDP per capita from country to grid level, based on population density. |
Economic development | Private consumption | Energy supply and demand Energy demand | Private consumption reflects expenditure on private household consumption. It is used in IMAGE as a driver of energy. |
Economic development | GINI coefficient | 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. |
Energy and land resources | Energy resources | Energy supply and demand Energy supply | Volume of energy resource per carrier, region and supply cost class (determines depletion dynamics). |
Energy and land resources | Built-up area - grid | 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. |
Environmental and other policies | Protected area - grid | Land-use allocation Land cover and land use Terrestrial biodiversity Ecosystem services | Map of protected nature areas, limiting use of this area. |
Environmental and other policies | Equity principles | 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). |
Environmental and other policies | Domestic climate policy | 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. |
Environmental and other policies | Air pollution policy | 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. |
Environmental and other policies | Biofuel policy | Agricultural economy | Policies to foster the use of biofuels in transport, such as financial incentives and biofuel mandates and obligations. |
Environmental and other policies | Taxes and other additional costs | Energy demand | Taxes on energy use, and other additional costs |
Environmental and other policies | Adaptation level | 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. |
Environmental and other policies | Energy policy | Energy conversion | Policy to achieve energy system objectives, such as energy security and energy access. |
Environmental and other policies | Climate target | Climate policy | Climate target, defined in terms of concentration levels, radiative forcing, temperature targets, or cumulative emissions. |
Lifestyle parameters | Preferences | Energy demand | Non-price factors determining market shares, such as preferences, environmental policies, infrastructure and strategic considerations, used for model calibration. |
Lifestyle parameters | Lifestyle parameters | Energy supply and demand Energy demand | Lifestyle parameters influence the relationship between economic activities and demand for energy. |
Population projections | Population | Energy supply and demand Agricultural economy Climate policy Energy demand | Number of people per region. |
Population projections | Urban population fraction | Human development | Urban/rural split of population. |
Population projections | Population - grid | Land-use allocation Nutrients Human development Flood risks | Number of people per gridcell (using downscaling). |
Technological change in agriculture and forestry | Irrigation project efficiency | Ratio of quantity of irrigation water required by the crop (based on soil moisture deficits) to the quantity withdrawn from rivers, lakes, reservoirs or other sources. This parameter is given at country level. | |
Technological change in agriculture and forestry | Irrigation conveyance efficiency | Ratio of water supplied to the irrigated field to the quantity withdrawn from the water source, determining the quantity of water lost during transport. This parameter is defined at country level. | |
Technological change in agriculture and forestry | Animal productivity | Livestock systems | Effective production of livestock commodities per animal per year. |
Technological change in agriculture and forestry | Livestock rations | Livestock systems Nutrients | Determines the feed requirements per feed type (food crops; crop residues; grass and fodder; animal products; scavenging), specified per animal type and production system (extensive/intensive/backyard/intermediate/intensive/broiler/laying hens). |
Technological change in agriculture and forestry | Manure spreading fraction | Nutrients | Fraction of manure produced in staples that is spread on agricultural areas. |
Technological change in agriculture and forestry | Fertiliser use efficiency | Nutrients | Ratio of fertiliser uptake by a crop to fertiliser applied. |
... further results |