The fossil fuel emissions of CO2, measured in Gtons CO2 per year, from the Developed, Developing A, and Developing B country groups.
Change the values to set future fossil fuel emissions based on a Stop Growth Year and a % Annual Reduction that begins in the Reduction Start Year.
The reference scenario used here is based on the IPCC scenario know as A1FI. The full version of C-ROADS allows users to drive scenarios with different reference scenarios.
The percentages apply to CO2equivalent emissions, which also include emissions of other greenhouse gases (methane, nitrous oxide, and fluorinated gases).
Close
The year in which emissions increase stops. Input may range from 2010 to 2100. Note that growth must be stopped for any reductions to apply.
Close
The year in which emissions start to decrease. Input may range from 2010 to 2100, but will only take effect once the "Stop Growth Year" has occurred.
Close
Annual rate at which each economic region decreases emissions. Percent may range from 0 to 10. Note that growth must be stopped for any reductions to apply.
Close
The global baseline emissions follow those of the IPCC's SRES A1FI scenario. Allocations between countries are based on downscaling of output from the four SRES reported regions to the 20 C-ROADS COP regions, which are then aggregated to the three C-Learn regions. To downscale, we mapped the SRES regions to COP regions and then made plausible assumptions about the distribution of population, GDP, emissions, GDP per capita, emissions per GDP, and emissions per capita. Details are provided at:
http://bit.ly/hXyrtY. Note - this reference scenario was changed in February 2012 to better match the A1FI assumptions.
The full version of C-ROADS (http://bit.ly/h4vDHM) allows users to drive scenarios with different reference scenarios.
Close
Many of the most developed nations. US, EU (27 countries) plus Norway and Sweden, Russia and former Soviet States, Japan, Canada, South Korea, New Zealand and Australia.
Close
Many of the fastest developing and larger nations. China, India, South Africa, Mexico, Brazil, Indonesia, and other large developing Asian countries.
Close
Smaller developing countries in the Middle East, Latin America (excluding Brazil and Mexico), Africa (excluding South Africa), and Asia (excluding China and India).
Close
CO2 land use emissions from deforestation.
This value is a "0-1" index for future "land use" emissions starting in 2012, where a decrease in value reduces deforestation, thereby reducing CO2 land use emissions. A value of 1 yields constant emissions (5.4 GtonsCO2/year) through 2100, 0 eliminates deforestation by 2050, and 0.5 yields a drop of 50% by 2050, and remaining at that level until 2100. Regions with negative emissions will not experience a change, in which case the overall effect is slightly greater than the indicated change.
Close
Annual removal of CO2 from the atmosphere due to the creation of new forests.
This value is a "0-1" index for future creation of new forests, starting in 2012, where an increase in value removes more CO2 from the atmosphere. A value of 1 delivers the IPCC estimated maximum annual removal (5.9 GtonsCO2/year); 0.5 delivers half of the maximum.
Close
For deforestation, this is a "0-1" index for future "land use" emissions where a value of 1 yields constant emissions through 2050, 0 yields a 90% drop by 2050, and .5 yields a drop of 45%. For afforestation, this is a "0-1" index for the annual removal of CO2 from the atmosphere due to the creation of new forests, starting in 2009 and continuing until 2050, where a value of 1 delivers the IPCC estimated maximum removed per year; 0.5 delivers half of the maximum.
Close
Atmospheric CO2 concentration in the year 2100, in parts per million.
Close
CO2 concentration in the atmosphere, in parts per million.
Close
Global average temperature change above the average preindustrial level, in degrees Celsius.
Close
Global average temperature change by the year 2100, in degrees Celsius.
Close