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- From Home screen change any or all of the following:
- “Emissions Peak” to the year you would like emissions to peak
- “Reductions Begin” to the year you would like emissions to begin to decline
- “Annual Reduction Rate” to the percentage of reductions you would like to see each year from your “Reductions Begin” setting
- “Prevent Deforestation” to reduce the amount of forests being destroyed.
- “Promote Afforestation” to increase the amount of forests being planted.
- Hit “Run”
- Explore the results on the graphs on the Home screen and under the menus at the top.
*Please note that the “Emissions Peak” must be set earlier or the same as the “Reductions Begin” for
values to appear correctly.
View graph and variable explanations:
- When the cursor changes from an arrow to a hand click on the graph title or variable name.
Return to default (Business as Usual) scenario:
- Click the “Reset to Default” button near the bottom-left of the Home screen
Share your scenarios:
- Hit “Save Run” to save your scenario for future use.
- Share your results with others by using a screen-capture software to copy graphs. Then paste them into your own presentations.
Guide to variables
Default or Business as Usual (BAU) for C-Learn is based on the Intergovernmental Panel on Climate Change’s (IPCC) RCP 8.5 scenario. The allocations between the country groups were calculated by downscaling the four SRES regions to the 20 COP regions used in C-ROADS. These were aggregated into the three C-Learn regions.
GHG Emissions by Country Group is the GHG emissions based on your settings for a Emissions Peak year and a Annual Reduction Rate that begins from the Reductions Begin year. You can set Fossil Fuel Emissions for each of the three country groupings: Developed countries, Developing A countries and Developing B countries outlined below.
Emissions Peak is the year when fossil fuel emissions stop growing for a Country Group. Enter a value from 2005 to 2100 and hit Tab to move to the next input field. The ability to enter past years permits you to explore what would have happened if emissions reductions had already started.
Reductions Begin is the year in fossil fuel emissions are reduced at the specified Annual Reduction Rate. Enter a value from 2005 to 2100 and hit Tab.
Annual Reduction Rate is the yearly percent reduction fossil fuel emissions. Enter a value from 0 to 10 and hit Tab.
2050 level relative to 2005 level is the percentage of change in emissions from 2005 that has occurred by 2050.
Prevent Deforestation is a “0-1” index for future “land use” emissions starting in 2016, where a decrease in value reduces deforestation, which reduces CO2 land use emissions. A value of 0 yields constant emissions (5.4 GtonsCO2/year) through 2100, 1 eliminates deforestation by 2050, and 0.5 yields a drop of 50% by 2050, 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.
Promote Afforestation is a “0-1” index for the annual removal of CO2 from the atmosphere due to the replanting of forests, starting in 2016. A value of 1 delivers the IPCC estimated maximum of 5.9 GtonsCO2/year (1.6 GtonsC); .5 delivers half of the maximum. Increase to remove more CO2 from the atmosphere by growing trees.
Guide to basic settings
Run runs the simulation using the displayed set of input values for Fossil Fuel emissions, Deforestation, and Afforestation to produce the results as “Current Run”. The “Current Run” results are not saved until you chose to save them. If you don’t save them, the current set of input values are stored until you change them individually or reset them all to the BAU default settings.
Save Run saves the “Current run” and prompts you to provide a name and description for the run. The name you give to the run will appear in graph legends of comparative graphs. Short names will fit better in the legend when you are comparing multiple runs. You may change the run name and description in the “Manage Runs” page if you decide you would like a different name or description for a run.
Reset to Default sets all the inputs to their default values and refreshes the “Current Run” to the default, which is Business as Usual.
Manage Runs takes you to the page where saved runs are listed and where you can choose which runs to display on the comparative graphs. Here you can all change the name of runs. Manage Runs is located on the menu bar to the right of “About”. If you do not change the run names in the “Name and Describe” dialog during the save process, all your runs will be named “Run”.
Developed Countries are most of the developed nations: United States, Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxemburg, Malta, the Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, the United Kingdom, Norway, Switzerland, and former Czechoslovakia) Russia, Albania, Bulgaria, Hungary, Poland, Romania, Bosnia & Herzegovinia, Croatia, Macedonia, Slovenia, Armenia, Azerbaijan, Belarus, Estonia, Georgia, Kazakhstan, Kyrgyzstan, Russian Federation, Tajikistan, Turkmenistan, Ukraine, Uzbekistan (includes former Yugoslavia and USSR), Canada, Australia, New Zealand, Japan, South Korea.
Developing Countries A are many of the fastest developing and larger nations:China, India, Indonesia, Philippines, Thailand, Taiwan, Hong Kong, Malaysia, Pakistan, Singapore, Brazil, South Africa, and Mexico.
Developing Countries B are smaller developing countries in the Middle East, Latin America, Africa, and Asia:
- Middle East: Bahrain, Iran, Iraq, Israel, Jordan, Kuwait, Lebanon, Oman, Qatar, South Arabia, Syria, Turkey, United Arab Emirates, Yemen, West Bank and Gaza (Occupied Territory)
- Other Latin America: Argentina, Chile, Colombia, Peru, Uruguay, Venezuela, Bolivia, Costa Rica, Cuba, Dominican Rep., Ecuador, El Salvador, Guatemala, Haiti, Honduras, Jamaica, Nicaragua, Panama, Paraguay, Puerto Rico, Trinidad and Tobago, and Caribbean Islands
- Other Africa: Algeria, Angola, Benin, Botswana, Burkina Faso, Burundi, Cameroon, Cape Verde, Central African Republic, Chad, Comoro Islands, Congo, Cote d’Ivoire, Djibouti, Equatorial Guinea, Eritrea and Ethiopia, Gabon, Gambia, Ghana, Guinea, Guinea Bissau, Kenya, Lesotho, Liberia, Libya, Madagascar, Malawi, Mali, Mauritania, Mauritius, Morocco, Mozambique, Namibia, Niger, Nigeria, Reunion, Rwanda, Sao Tome & Principe, Senegal, Seychelles, Sierra Leone, Somalia, Sudan, Swaziland, Tanzania, Togo, Tunisia, Uganda, Zaire, Zambia, Zimbabwe, Mayotte, Saint Helena, and West Sahara.
- Other Small Asia: Bangladesh, Burma, Nepal, Sri Lanka, Afghanistan, Cambodia, Laos, Mongolia, N. Korea, Vietnam, and 23 Small East Asia nations
Viewing Results in Graphs
On the left side of the Home screen, the graphs display the emissions profiles resulting from the inputs you made for fossil fuel emissions and changes that you made to the emissions from Deforestation and Sequestration from Afforestation.
On these graphs you see a graphical representation of the emissions from 2000-2100 corresponding to the input settings. For example, if you chose a stop growth year mid-century in emissions for “Developed Countries”, you will see the emissions graph line for Developed Countries stop growing in 2050.
On the right side of the Home screen, you see the impacts of your input choices on the atmospheric CO2 concentration and average global temperature increase..You can see many other resulting graphs showing the behavior of other variables in your simulation run by clicking on graph areas in the navigation bar. Note that some graphs show just the results from the most recent simulation and some graphs are “comparative”, showing multiple runs on the same graph.With each graph there is also an option to view the table of the data.
Menu names and graphs that can be viewed:
- Fossil Fuel Emissions
- Fossil fuel emissions by country group
- Total fossil fuel emissions – comparative
- Fossil fuel emissions – stacked
- Cumulative emissions fraction
- Cumulative emissions fraction – stacked
- Emissions per capita
- Other Emissions
- CO2eq emissions by country group
- Global CO2eq emissions – comparative
- Global CO2eq emissions – Paris Outcome comparison
- Deforestation – comparative
- Afforestation – comparative
- Global CO2eq Non-Forest Emissions- comparative
- Sources of emissions – stacked
- CO2 & CO2EQ
- CO2 in atmosphere
- CO2 in atmosphere – comparative
- CO2 in atmosphere – Paris Outcome comparison
- CO2EQ in atmosphere
- CO2EQ in atmosphere – comparative
- Emissions and removals
- Removals – comparative
- Sources of removals – stacked
- Bathtub Graphs
- Emissions & Removals; CO2 in Atmosphere; Bathtub
- Temperature °C
- Temperature °C – comparative
- Temperature °C – Paris Outcome comparison
- Temperature °F
- Temperature °F – comparative
- Sea level rise
- Sea level rise – comparative
- Ocean pH
- Ocean pH – comparative
Comparative graphs will include up to 5 runs plus the BAU baseline. You may select which saved runs to include from the Manage Runs page. You may also Reload the settings from a saved run using the “Reload Run” button.
Stacked graphs include the results from several related variables. The total of all the variables is the top of the graph.
Viewing and Copying Results as Data
On each graph page there is a Graph/Table pair of radio buttons for viewing either the graph or its related table of data. By clicking the Table button you can view the graph’s raw data from the current run or the runs you have chosen to compare. This can be especially helpful when, for example, you want to see the value for CO2 concentration in a specific year such as 2050 or 2100.
You can also copy and paste the data into your own spreadsheet software to make your own graphs. The data are available at two-year intervals starting in 2000. If you right-click on the graph itself you will copy the data from the graph which is present at 8 year intervals starting in 2002.
Using Graphs to Make your Own Presentations and Reports
You can transfer your graphs to your own reports or presentations by using screen capture software to make a copy of the graph. Direct printing of the graphs or copying them as images is not supported at this time.