C-ROADS Model Version History

May 2021 Release

New

  • Translation into Portuguese: The C-ROADS user interface is now available in Portuguese.

Updated

  • Structural upgrades to the user interface: We have updated the underlying architecture of C-ROADS so that the model runs inside the browser. The simulation runs much faster, and therefore graphs update instantaneously when sliders are moved or numbers are entered into the input fields.
  • Improved the positioning and responsiveness of the Large Graph and 2100 Data Table windows. The plots and data in these windows now update automatically when new values are entered into the main window.

April 2021 Release

Updated

  • C-ROADS Model version 1.36
  • Relocated the graphs for Cumulative CO2 from the greenhouse gas (GHG) menu into the CO2 Emissions menu for 3-Region and 6-Region levels of simulation aggregation.

New

  • Added two new graphs for Global Cumulative CO2 for 2000-2100 and 1990-2015 (historical data) to the CO2 Emissions menu for all three simulation levels.
  • Added new “Historical Global Net Greenhouse Gas Emissions” and “Global Nonforest Greenhouse Gas Emissions” graphs to the Greenhouse Gas Emissions menu for all three simulation levels.

February 2021 Release

New

Updated

  • C-ROADS Model version 1.33
  • Updated data file with new HADCRUT5 dataset.
  • These data updates lead to a temperature change adjustment from 0.16°C to 0.05°C as outlined in more detail in the related article on the En-ROADS baseline updates.
  • Changed all mentions of the 18th or 19th century to “from 1750” or “from 1850”, respectively.
  • Updated historical CO2 emissions with data from the Global Carbon Budget (2020) and for other GHGs with PRIMAP-hist (2019).
  • Improved and simplified CH4 concentration calibration to avoid unnecessarily introducing more uncertainty in response to CH4 concentration effects on uptake and to include updated PRIMAP data.

Fixed

  • Corrected the “Sources of CO2 Removals” graph to read “Sources of Carbon Removals” and corrected the y-axis label to indicate “Gigatons carbon/year”.
  • Relocated the graph, “Global Cumulative CO2 Emissions from 1900-2017” under the Energy CO2 Emissions menu where it belongs.
  • Removed the outdated “Show Paris Outcomes” feature under the “View” menu. It will be replaced in a future model update.

December 2020 Release

Updated

  • C-ROADS Model version 1.32 - updated to align with the baseline scenario of En-ROADS, which results in temperature in 2100 of 3.6°C (6.5°F)
  • Changed the phrase “Business as usual” and “BAU” to “Baseline” across the interface.
  • Changed the minimum year for all inputs to 2021.
  • Changed the application name from “C-ROADS World Climate” to simply “C-ROADS”.
  • Temperature change now reported relative to 19th century instead of 18th century.
  • Adjusted baseline greenhouse gases per GDP parameters to better reflect recent trends, and updated projections in energy and land use.
  • Updated the long term GDP per capita rate from 1%/year to 1.5%/year but achieved sooner, i.e., decreased convergence time.
  • Changed the last GDP historic year from 2018 to 2019; it is now in $2017 PPP (purchasing power parity) instead of $2011 PPP.

Fixed

  • Improved the layout to make room for larger graphs.

August 2020 Release

Updated

  • C-ROADS Model version 1.29

Fixed

  • Fixed behavior of “Prevent Deforestation” for regions with net negative land use emissions

New

  • Added “Economic Growth” and “Population Growth” sliders in Assumptions panel

May 2020 Release

Updated

  • C-ROADS Model version 1.26
  • Updated historical data through 2018 for GDP and CO2
  • Update F-gases to be consistent with SSP2 (as with En-ROADS)

New

  • Add new menu selection, Help>Release Notes, to access model release notes

March 2020 Release

Updated

  • C-ROADS model version 1.22
  • Updated historical values
  • Updated start years to 2020

Fixed

  • Redraw the chart when the large graph window is resized
  • Doubled the size of labels on the large graph window
  • Resized the temperature panel fonts when the window is resized
  • Removed spurious scrollbars in some layouts
  • Changed afforestation and deforestation to percent of max
  • Change graph menu title from “Model Validation” to “Model Comparison”

New

  • Added partial Korean localization
  • Improved the way Afforestation is simulated (need details)
  • Change MIT link to the Sustainability Initiative
  • Notarize the Mac app at the App Store
  • Added new CI resources links

March 2018 release

Version 1.1.7, released on 2018-03-14

  • C-ROADS model version 1.09
  • Refine the layout of the temperature in 2100 panel
  • Added Paris outcome reference scenarios to more graphs
  • Quit app when window closed on Mac
  • Add Windows shortcuts to all menus