Uses newly available GDP data in 2011 PPP through 2015, CO2 FF data through 2015, and Land use CO2 through 2014.
Uses CO2 per GDP rates as determined from recent trends over the
past decade as initial projected rates and shorted, as warranted, the
time to converge those rates
Added structure to HFCs Reference emissions to reflect Kigali Deal
Resulting Reference temperature in 2100 is now 4.2 Deg C
Updated starting years to 2017.
Removed the graphical input entry feature.
10 Nov 16
Inputs for Deforestation and Afforestation are now a 0-100% scale, replacing the 0-1 scale.
When using World Climate mode in either 6 or 3 region, the default graph for emissions is CO2 Fossil Fuel Emissions.
Added graphs for Deforestation and for afforestation to the World Climate simulation mode.
25 May 16
Change input for Deforestation in World Climate mode—The input for
deforestation is now set up as effort to prevent deforestation, a 0 to 1
scale. Input a value between 0 and 1 to adjust the level of CO2
emission reductions in land use and forestry.
0 – represents no change from the business as usual scenario and
yields constant emissions (5.4 GtonsCO2/year) from deforestation through
0.5 – yields a drop of 50% emissions by 2050, and then remains at that level until 2100.
1 – is the equivalent of eliminating all deforestation globally by the year 2050.
Changes to the Welcome screen and dedicated World Climate 6-region and 3-region modes.
From the Program settings screen you may set the model to open with
the graph for “Temperature and Goal” graph to either °F or °C. When the
simulation is running you still have the ability to shift between °F
and °C from the “Settings” tab.
In the “Settings” tab you may show or hide the effects of the INDCs from COP21 (last updated 4-Apr-16).
The final temperature in 2100 is displayed at the top of the screen in both °F and °C.
The default Reference Scenario is now calculated to be consistent
with IPCC’s Fifth Assessment Report (AR5) and captures the relationships
of population, GDP per capita, and emissions per GDP. Population
defaults to use the UN’s medium fertility projections (UN, 2015). GDP
is consistent with the Shared Socioeconomic Paths (SSPs). It is
determined as the product of population and GDP per capita, which, for
each of the model’s 20 regions, is a function of its starting value from
history and projected rate of change. These projected rates start at
levels consistent with historical data and converge to 1%/year over
region-specific times aimed to achieve long term convergence of GDP per
Comparable to GDP per capita, Reference Scenario emissions of each
GHG are consistent with Representative Concentration Pathway 8.5 (RCP
8.5) and are determined as the product of population, GDP per capita,
and emissions per GDP. Likewise for GDP per capita, emissions per GDP
of each GHG is a function for each of the model’s 20 regions of its
starting value from history and projected rate of change. The starting
rate of each region converges to a minimum GHG-specific rate over times
aimed to achieve long term convergence of emissions per GDP.
04 Dec 15
Corrected initialization files for graphical inputs
Created new Excel file for user inputs, “User Scenario v4 027.xls”
03 Dec 15
Updated the settings files for INDCs to the most recent pledges.
Added a feature that will use a settings file (.cin) to create a
results file (.vdf). This is a new button on the ‘Welcome’ page—
‘Settings —>Results’— which simplifies the updating of results files
for use in Uncertainty analysis.
24 Nov 15
Graph line thickness may be adjusted from the ‘Settings’ Tab. This applies to small and large graphs.
Removed obsolete reference scenarios– EMF22 series and SRES series.
12 Nov 15
Corrected several minor graph labeling issues
Added graphs to 3 region version for Cumulative Fossil Fuel CO2 per Capita and Cumulative CO2 equivalents per Capita
5 Nov 15
C-ROADS has been calibrated to the latest Intergovernmental Panel on
Climate Change (IPCC) report (AR5) and now uses the IPCC’s RCP8.5
scenario as the default or reference scenario representing business as
Settings files have been packaged with C-ROADS that allow users to
load the intended nationally determined contributions (INDCs) that
countries have submitted for the upcoming climate negotiations.
We have also included a 3-region World Climate mode that divides the
world into Developed Countries, Developing A Countries, and Developing B
countries for the World Climate Exercise.
The lower limit of climate sensitivity can now go as low as 1.5°C (rather than 2°C).
Graphs are provided with comparisons between C-ROADS projections for
temperature and CO2 concentration to those of RCP 8.5, 6.0, 4.5 and
Population scenarios that match the UN may be adjusted.
Historical data was updated to include most recent available, and all start years were updated to be 2015.
The Excel and Non-Excel input versions have been combined in a single C-ROADS version.
28 Jul 14
We have created a modified version of C-ROADS, v3.015.02X that does
not require Excel to run. Either version is available from the download
link. The default download is the non-Excel version.
10 Jul 14
Corrected a miss-assigned input slider for the Goal line for CO2e on the Atm CO2e and Goal graph.
29 Apr 14
Corrected an issue within the World Climate setup mode whereupon
returning from “Load/Unload Run” or “Reset to Reference” the WCE setup
mode reverted to normal C-ROADS use with all the tabs on the input pane
active rather than remaining in the special World Climate mode.
Edited the help text related to the Sensitivity settings.
6 Dec 13
The historical data sets for CO2 fossil fuel emissions and the
inclusion of recently made available historical CO2 bunker fuel
emissions data have been updated in this release. Additionally, other
variables have been updated with more recent data, including population
and GDP, Mauna Loa data CO2 concentration data, and GISS other forcings.
The GISS data were also slightly updated, which required a readjustment
to the MAGICC historic values, where the adjustment brings the mean
over 1880-1999 to be the same between both data sets.
25 Nov 13
Graph colors fixed in “Contributions”
4 Feb 13
Units change from MEX to PPP
In C-ROADS, GDP is represented in units of $2010 MEX/year (market exchange rate)
except when you choose “A1FI with EIA allocations,” the top menu item
for the reference scenarios. For this selection the units are expressed as
$1990 PPP/year (purchasing power parity). The “User Scenario v3
012.xls” sheet which is used when you choose “User Reference
Scenario”, has been updated to reflect that the GDP reported therein is
now M $2010 MEX/year.
24 Sep 12
We have added graphs for CO2 equivalent emissions by country and global to the “CO2 Equiv” graph menu and have relocated “Forestry Net Emissions by Country” graph from the “Land Use” menu to the “CO2 Equiv” menu to follow the general rule that the graphs on the left are more emissions related and the graphs on the right are more results- or impact-related.
new graphs are also present in the right graph pane under the menu “GHG
concs”, which was formerly labeled “CO2 & CO2e”. These are for the
atmospheric concentrations of CH4, N2O, and atmospheric CO2e and the
user specified goal for CO2e. The goal for CO2e is set on the “Settings”
pane using the “Atmospheric CO2e Goal” controls.
Modification to the World Climate input table
When a country/bloc is set for Manual,
Excel, or Graphical input, the table cells representing it in the World
Climate input table are disabled for input and grayed. In the example
shown in the figure, both the US 6R and India 6R are set to Manual or
Excel input respectively and their respective rows are disabled. The
settings for Deforestation for the US, EU, and China are always disabled
and grayed out. The remaining forestry inputs are either displayed as
in the figure when WCE Forestry inputs are active or are grayed/disabled
when Land-use Forestry inputs are active. Inputs to table cells are
prevented when the cells are disabled.
Revised Historical data added CO2
The changes in CO2emissions are very slight and are due to
a revision released by the Carbon Dioxide Information Analysis Center
(CDIAC). The updated reference for this is:
Boden, T.A., G. Marland, and R.J. Andres. 2011. Global, Regional, and
National Fossil-Fuel CO2 Emissions. Carbon Dioxide Information Analysis
Center, Oak Ridge National Laboratory, U.S. Department of Energy, Oak
Ridge, Tenn., U.S.A. doi 10.3334/CDIAC/00001_V2011,
The changes in the emissions of other GHGs are due to the more
complete national data released by EDGAR 4.2. Before this update, CH4, and N2O
data relied on allocation between countries consistent with data by
MIT’s Joint Program on the Science and Policy of Global Change (JPSPGC)
Technical Note No. 8 (2006) but scaled to the global emissions provided
by Stern and Kaufmann (1998) for CH4 and EDGAR-HYDE 1.4 (Van Aardenne et al., 2001, adjusted to Olivier and Berdowki, 2001) for N2O emission data. Those data spanned through 1995.
Similarly, MIT’s JPSPGC Technical Note 8 (Asadoorian et al., 2006) provides the historical emissions for PFCs and SF6
by country. HFCs are considered as nine of the predominant individual
HFC gases. The historical data for HFCs were based on MIT’s JPSPGC
Technical Note 8 (Asadoorian et al., 2006) HFC-134a equivalent
emissions, which were allocated between the different HFC types
according to the ratio of the different types at the earliest year of
A1FI projections, i.e., in the year 2000.
Now, EDGAR 4.2 provides the historical emissions from 1970-2008 of CH4, N2O,
and F-gases (including PFCs, SF6, and the nine predominant HFC types).
Pre-1970s data still relies on the former methodology. Globally, the
results are fairly consistent except for N2O, which is approximately 17% less for the EDGAR 4.2 data than it was using the global data by EDGAR-HYDE 1.4 (Van Aardenne et al., 2001, adjusted to Olivier and Berdowki, 2001).
The evaluations of Reference Scenarios as determined from downscaling
using the updated and more reliable historical data reveal that in many
cases the regional consistency with SRES and EMF regions is indeed
improved. However, there are also many cases where it appeared better
and the bridge from historical to projected emissions was smoother when
we used the less complete data, which relied on more assumptions
including filling in the gap of years between 1995 through 2010 using
those models’ projections. However, SRES and EMF projections were
generated before the data occurred, and history has not always been
consistent with those projections. Our task in downscaling from those
models has been to accurately reflect history with the best available
data and bridge those with the SRES/EMF projections.
The population projections under the alternate Reference Scenario
have been slightly updated to reflect a few corrections in the regional
assignment of countries listed by the United Nations, the source of the
alternate population reference scenario.
In the 6-region aggregation, when changing one country/bloc to World
Climate inputs, the Forestry/Land Use inputs were also changing the to
World Climate mode. This has been decoupled so that Forestry/Land Use
inputs must be explicitly changed to World Climate mode if desired. The
exception to this occurs when the “World Climate Setup” button on the
Welcome/Main screen is clicked which sets all regions to World Climate
as well as sets the Forestry/Land Use inputs for World Climate.
We also corrected a labeling error in the y-axis label on graphs for Cumulative Fossil Fuel CO2 from PPM to GTon CO2in the Contribution Analysis.
the Dataset Control dialog is dismissed, C-ROADS remains the active
window. Whenever the current_run is not active, there is a message to
that effect displayed below the graph legends and below the control
Set X-axis for Graphs feature while in “Review Run(s)” mode
The “Settings” tab was not active when C-ROADS was used in “Review Run(s)” mode preventing access to the Set X-axis for Graphs
feature that allows changing the x-axis. This has been corrected and
the x-axis may be changed in “Review Run(s)”, “Load Saved Run”, and
“Create New Run” modes. There is a reminder message at the bottom of the
control area to guide the user back to the current run when desired.
6 Mar 12
Excel and graphical inputs in 1-region/Global mode
We have added the ability to input Fossil Fuel CO2 emissions targets using the Excel spreadsheet, User Scenario v3 005.xls, as well as via the graphical input mode*. Setting inputs for 1-region is now the same as for the 6-region and 15-region spreadsheet input.
Two additional graphs have been added to the graph viewing panes. Under the “CO2 Emissions” menu on the left graph pane, two Global Cumulative Fossil Fuel CO2 Emissions graphs are available displayed either in GTons Carbon or as GTons CO2. These new graphs are available at any of the C-ROADS aggregation levels.
Resize to Screen Size Option
you open the C-ROADS Directory within Windows Explorer, you will see
both “C-ROADS v3.VNP” and “C-ROADS v3 – resize.VNP.” Selecting the
“C-ROADS v3 – resize” option will open C-ROADS in a mode which scales
the C-ROADS User Interface to fit a larger or smaller screen size. This
is especially helpful if you using a screen that is smaller than the
minimum 1024 x 768 that the normal C-ROADS interface is designed to fit.
The screen rescaling is not merely a zoom of the screen and as such
some items do not scale as well as others. Nevertheless this option can
be helpful with small screens. For projection purposes, we recommend
changing the computer’s screen resolution to closer to the projector’s
resolution to make the C-ROADS native 1024×768 image more visible. This
preserves the quality of the user interface.
Dataset Control help dialog
When you click on the “Load/Unload Run”
button, there is now a help file to guide your resizing of the “Dataset
Control” dialog. It is there if you need it, and may be ignored if you
don’t. When you dismiss the “Dataset Control” dialog, the help screen
Adjust x-axis maximum and minimum on graphs
In the Settings pane there is a new adjustment for graphs, Set X-axis for Graphs,
which contains a pair of input boxes that allow you to change the
displayed years on those graphs that normally display from 2000-2100.
This feature may be useful if you want to focus attention on near term
goals such as 2020 targets or 2050 targets by only showing the relevant
years of the graph or historical portions of particular data.
A bug was repaired that caused a saved run
which was at 1-region/Global resolution and opened using “Load saved
run” to open without displaying the Emissions targets settings on the
If the Reference scenario was not set to
the default, SRES A1FI MINCAM, on the Welcome/Main view and a saved run
was loaded that used the default as the reference scenario, the run
would be loaded with the incorrect reference scenario.
1 Feb 12
Model Sensitivity testing with the new Sensitivity tab
You can now test the sensitivity of C-ROADS results to eleven key parameters in the Sensitivity pane. They include:
biomass loss from afforestation
carbon cycle: land and Ocean Uptake
methane Emissions from biological activity
methane emissions from permafrost and clathrates
temperature threshold for permafrost and clathrates
Emissions/GDP: Ref Scenario
Emissions/Capita: Ref Year
Emissions/Capita: Ref Scenario
Changes in the Emissions Targets input controls– Additional Target types
On the Emissions Targets tab there are three new target types:
Emissions/GDP: Ref Scenario
Emissions/Capita: Ref Year
Emissions/Capita: Ref Scenario
We have renamed the menu choices to help point out the differences and similarities.
Population and GDP controls
In the new “Population and GDP” tab,
assumptions within the selected Reference scenario about population and
GDP may be adjusted using the controls found in this new input pane.
Additional output graphs
Six additional graphs have been added to
the graph viewing panes. Under the “ Other” menu on the left graphs pane
there are country/bloc level graphs for Population, GDP, GDP per capita
and Gross World Product per capita. On the right graph pane, under the
“per Capita” menu there are two new graphs for Global emissions per
capita and Global emissions per Gross World product. These two variables
are also present on the corresponding country/bloc level graphs as
points of reference.
New World Climate Exercise tab
We have added controls to enable C-ROADS to
be used for facilitating the World Climate role playing exercise. With
the press of a button on the main page you can set up a 6-Region
simulation and activate the controls on the World Climate Exercise pane
and deactivate most of the other input controls to provide a clean,
simplified version of C-ROADS for use with World Climate. The controls
allow World Climate type inputs of “Growth Stop Year,” “Decline Start
Year,” and “Annual emissions reduction (%/year)”. Forestry inputs are
also controllable as a 0-1 index for deforestation and afforestation by
country or bloc.
For the advanced C-ROADS user, the controls for the World Climate
Exercise may be activated after initiating a 6-region run using the
“Create New Run” button or by loading a previously saved 6-region run
using the “Load Saved Run” button. Either will allow access to all
C-ROADS control elements during a World Climate session as well as the
reference scenario you have chosen from the menu. Emissions for
individual countries may be entered in the standard “manual” mode rather
than using the World Climate style entry allowing extensive flexibility
in your use.
Recalibration of the Reference Scenarios
We recently updated the Reference Scenarios
(RS) to improve our methodology for downscaling from the more spatially
aggregated data sources, i.e., SRES scenarios and EMF22 models. As a
result, the global projections for BAU emissions remain largely
unchanged but the allocation of future BAU emissions between C-ROADS
regions has shifted. Specifically, our new default, which remains based
on SRES A1FI, now has a greater share of the global emissions coming
from the Developed and Developing non-MEF regions. As before, the user
can choose among the suite of reference scenarios or base model runs on a
customized, user-designed reference scenario.
10 Aug 11
Design changes to the Main/Welcome screen
We have modified the Main/Welcome screen with some changes in button
placement to emphasize the precedence of button function. Buttons and
menus are now grouped in three categories: Settings, Simulation, and
The Set Graph Defaults button has moved under the Settings heading which is more appropriate to its functional role.
There are two ways to “enter” a simulation, Create New Run and Load Saved Run. Create New Run
starts a new simulation run using the User-specified settings from the
Aggregation level and Reference Scenario drop down menus and the
simulator default settings for all input controls.
You may also start a simulation based on a previously saved run using Load Saved Run.
This will start a simulation with all of the simulator input control
settings you had set previously when you saved the simulation, including
the Aggregation level and the Reference Scenario source. You may make
changes or modifications to the input controls of the simulation and Save Run
again to preserve the run in its new state which is comprised of any
unchanged control settings from the starting file and any new setting of
the input controls— starting settings plus changes. This also allows
you to create a favorite starting set of settings that you use as the
basis for your “new runs” even a simple as, for example, “15-region,
User Defined Scenario baseline.”
We have removed the Update Run function as it did not add to the capabilities provided by Load Saved Run.
Each of the Post-simulation Analysis functions requires a saved simulation file as its input. These are the <filename.vdf> files that you see in the “Simulation Output” and other directories.
Contribution Analysis takes a previously
saved C-ROADS-CP run and performs a leave-one-out analysis of the global
data to determine the contributions of each country/region to
Cumulative Fossil Fuel Emissions, CO2 ppm, Temperature, and Radiative
Forcing. Uncertainty Analysis takes a
previously saved run and performs an uncertainty/sensitivity analysis
using an analysis toolset file and displays the results for multiple
variables. Review Run(s) is unchanged from previous versions of C-ROADS-CP but the button has been moved from Simulation to Post-simulation Analysisbecause, functionally, it is an analysis of previously created simulation output. Export Dataset remains unchanged and creates an Excel file containing the data from the variables displayed on the graphs.
1 region- Global aggregation
There is a new option for the aggregation setting, “1 region- Global.” Selecting this and choosing Create New Run
will start a simulation in which the Emissions Targets, Non-CO2 GHGs,
and Land-use Emissions controls affect emissions and land-use for the
entire world. The 1-Region level of aggregation provides a means for a
“quick sketch” to explore the dynamics and sensitivities of different
changes to user inputs.
Changes in the input controls
Several of the settings have been moved to their relevant tabs—Deforestation and Afforestation baseline settings to the Land-use Emissions tab and the settings for Non-CO2 GHGs to the new Non-CO2 GHGS tab.
Emissions Targets tab (formerly Fossil Fuel CO2 emissions)
The Fossil Fuel CO2 Emissions tab has been renamed as the EmissionsTargets
tab. This change reflects the nature of the controls on this tab. These
controls, by default, control emissions of all Kyoto Protocol
greenhouse gases, GHGs. This default behavior is changed depending on
the setting of the Non-CO2 GHGs controls (below). When the Non-CO2 GHGs
control is set to its default setting to follow “Emissions Targets”,
the three emissions targets and the post target controls affect all
Non-Land use emissions— Fossil fuel CO2 emissions plus non-CO2 GHG emissions. When the Non-CO2 GHGs control is set to follow “Reference scenario non-CO2 GHG emissions”, the Emissions Target tab controls affect only Fossil fuel CO2 emissions; the non-CO2 GHG emissions are controlled by the active Reference scenario under these conditions.
The “Post target” setting determines how emissions will behave after
the final target year is passed. There are 4 post target settings: Cap
at target level, Continue rate to target, Resume Reference Scenario and
Specify rate. The Post target behavior is itself determined by the
selected target type: OFF, Ref year, Ref Scenario or Carbon Intensity.
The default behavior, “Cap at target level” depends on whether the
target type was set by Reference year, Reference scenario or by Carbon
Intensity. When you select a target type of “Reference year”, when the
target year is achieved the emissions remain constant at the target year
value. If you have chosen a “Reference scenario” target type, when the
target year is achieved the emissions will resume at the rate defined by
the active Reference scenario. Finally when you choose a target
relative to “Carbon intensity”, when the target year is achieved the
carbon intensity will remain capped at the level reached in the target
year. Post target setting applies to the last target type setting.
For the remaining three settings of post target rate, all three
target types behave in the same manner regardless of which target type
Continue rate to target— the emissions rate will follow the same rate post target as it followed to hit the target.
Resume Reference Scenario— after
the target is reached, the emissions rate will resume the rate defined
by the active Reference scenario.
Specify rate— you may set the post target rate at a fixed rate between 10%/year and -10%/year.
Precedence of Reference Scenario vs. User settings.
For 6 and 15 region, if the Reference Scenario rate of reduction is
greater than specified by the user, the Reference scenario becomes the
cap. An example is shown in the figure. The reference scenario behavior
is the green line. Reduction starting in 2012 (1st up-arrow) to 25% below 2000 levels by 2050 (2nd
up arrow) is the red line. From 2012 until ~2020 (first down arrow) the
Reference scenario is less than the User scenario so the Reference
scenario predominates. From 2020 until 2055 (2nd down arrow)
the User scenario is less than the Reference scenario and the User
scenario predominates. At 2050, the emissions rate becomes constant at
the user-specified 2050 level until approximately 2055 when the
Reference scenario is lower than the user-specified 2050 level and the
Reference scenario again predominates.
If instead of 25% below 2005 levels, the user had specified 0% below,
or 2005 levels, the Reference Scenario would always predominate and
there would appear to be no model response when in fact the model
response is to use the lesser of the Reference scenario or the
Non-CO2 GHGs tab
This new tab is a new location for the control from the Settings tab, “Non-CO2 GHGs.” The options have been renamed from “Follow CO2 emissions” and “Reference Scenario” to “Fossil Fuel CO2 emissions targets” and “Reference Scenario Non-CO2 GHG Emissions”. Their functions remain the same. There is a third new capability, “Scaled Reference Scenario Non-CO2 GHG Emissions”. This setting allows you to create a scaled version of the reference scenario that will apply to the non-CO2 GHGs in the reference scenario.
In addition to the new “Scaled Reference Scenario Non-CO2
GHG Emissions” capability, these settings have been disaggregated to
match the aggregation level of the run: 1 region, 6 region or 15 region.
They were previously only global. There are table inputs and individual
country inputs available for 6- and 15-region aggregation. An example
of the 6-region input below shows the active buttons when the “Scaled
Reference Scenario Non-CO2 GHG Emissions” is selected for a country or region- note the red dots.
The setting of the Non-CO2 GHG switch changes the nature/target of the controls on the Emissions Targets tab as described above under “Emissions Targets.”
Land use emissions tab
The baseline settings for Deforestation and Afforestation have moved from the Settings
tab to this tab so all the Land use emissions settings are grouped
together. There is no change in their function. When the Land use Global
settings input pane is visible, these settings are active. Conversely,
when the country/region settings are visible, country/region settings
are active. The settings that were active at the time of a “Save Run” will be active if you reopen a saved run, but both global and country/region settings are saved.
Non-CO2 forcings tab
This is a new function. You may set, using graphical inputs, three non-CO2 forcings: 1) Organic Carbon, Black Carbon, and Bio Aerosols, 2) Solar and Albedo, and 3) Ozone Precursorforcings.
They are activated by a check box. Saving the model run will save the
settings of the graphical inputs as well as the state of the check box.
10 Mar 11
Directory structure added
In release v2.148a.46 we have added a new directory structure that
will help separate user–generated files from C_ROADS CP files created
during installation. Previously, the two file genera were co-mingled and
C-ROADS-CP would only read files from specified directories making it
complicated for users to maintain any sub-directory organization of user
files. The folder view of the new structure is shown here. The default
location when savings simulation results is the “Simulation Output”
folder. Users can create additional organization in this folder,
depicted by the “Optional User folder.” These new folders can have any
name and there can be one or more such folders. Please note, uncertainty
output generated by the “Uncertainty” functionality should not be saved
in the ‘Simulation Output’ folder to avoid confusion for the user (they
have the same file-type and *.VDF extension).
“Simulation Output” directory supplies files for multiple starting points
User files are now written into two user specific folders,
“Simulation Output” and “Uncertainty Output”. This directory structure
separates User files from C-ROADS-CP related files to help ensure
Simulation Output Directory (Folder)– This is the default location to
which files are saved whenever you save a simulation run. It is also
the default location from which files are read when you select Update
run, Load stored settings or Review run.
If you wish you may create additional sub-directories for storing
specific project output from simulation runs (e.g., “Optional User
Folder” as shown above in the figure).
Within the “Simulation Output” directory there is a sub-directory
called “Provided output.” It contains three settings files: Kyoto
110208CP.cin, Confirmed reductions 110208CP.cin, and Potential
reductions 110208CP.cin and two simulation output files, Confirmed
reductions 110208CP.vdf, and Potential reductions 110208CP.vdf. These
settings files were generated using the A1FI reference scenario. The
settings are further detailed on the Climate Scoreboard pages of the
Climate Interactive website at
and in related pages accessed by the navigation pane on the right hand
side of the web page. Confirmed proposals include official government
statements, adopted legislation, and UNFCC submissions. Potential
proposals include conditional proposals, legislation under
consideration, and unofficial government statements.
The analysis processes for Contribution analysis or Uncertainty
analysis also use the “Simulation Output” directory as the default for
loading saved output for analysis, but can open files from other
“Uncertainty Output” directory
After you have performed an Uncertainty analysis of a simulation
output, you may save the result. C-ROADS-CP will suggest a filename that
is a concatenation of the Simulation output filename and the Analysis
Control File name which is decent way to keep track of how the file was
created. If files get confused, it is easy to recreate an analysis from
the original simulation as needed.
When you save output from an Uncertainty analysis it is always saved
into the directory, “Uncertainty Output”, regardless of whether you
navigate away from this directory during the Save File dialog
interaction. Once files have been saved, you may move them into your
Optional sub-directories and review them later from within those
Our goal here is to keep Simulation Output files separate from
Uncertainty Output files. Both have the same file type suffix, .vdf, but
they are not inter-convertible.
Reference Scenario default changed to SRES A1FI MINICAM
We have added active links within the C-ROADS-CP interface to
web-based files containing relevant information relative to simulator
Active link location?
Click version number on the Welcome page
Default Reference Scenario
Button in Help? for Ref Scenario selection
Buttons on Getting started pages
Buttons on Reference page
C-ROADS-CP Reference guide
Button and link on Reference page
C-ROADS-CP Scientific review
Button and link on Reference page
FAQ for C-ROADS and C-ROADS-CP
Buttons and links on FAQ page
Known Issue with Unicode in Folder/Directory Names
While we have improved the model in numerous ways and fixed many
bugs, there is still an unresolved issue. If non-English characters are
used in the pathname of the C-ROADS-CP model folder (e.g., é, ñ, ø, î,
å, etc.), the directory path name cannot be interpreted correctly by the
modeling software and C-ROADS-CP won’t run.
We have the following two workarounds for the problem. Either rename
all the folders in the directory path name so they contain only standard
English characters so “Léo” would become Leo or Piñon would become
Pinon. Alternatively, install C-ROADS-CP in the location, C:C-ROADS-CP
v2 (that is, directly at the root of the hard drive). By avoiding
non-English characters, the supporting software will operate properly.
We apologize for this inconvenience that is out of our control. The
underlying problem will be corrected before the next C-ROADS-CP release.
Bug and feature fixes in this version
Some reference scenario graph lines were incorrectly labeled as to
the reference scenario source from which they were derived. Whenever a
new reference scenario was used to create a new run and this was
followed by update run or review run, the reference scenario was not the
correct reference scenario to match the updated or reviewed run, but
was from the reference scenario from the previous Create new run.
Review run, Contribution Analysis, and Uncertainty analysis now
generate a reference run when invoked. Review run determines the
relevant reference scenario that was used to produce the run being
examined and regenerates the reference scenario. Contribution Analysis
and Uncertainty analysis generate a reference run based on the current
selection for Reference Scenario on the Welcome screen.
Some minor adjustments to GDP projections to reflect better the individual countries’ rates.
Changing to a new Reference Scenario on the Main/Welcome screen and
proceeding directly to Contribution Analysis or Uncertainty analysis did
not generate a new Reference run (ref.vdf) which would incorporate the
new reference scenario settings. This has been corrected. A copy of
ref.vdf is now placed into the Simulation Output directory each time a
new reference scenario is generated so ref.vdf represents the active
14 Dec 10
We have added two new graph types that allow comparisons of runs from
individual countries. The graphs are entitled “Comparative FF CO2
emissions by country” and “CO2 equivalent non-forest emissions by
country group” and are found in the left graph display pane. Access to
them is from the “CO2 Emissions” and “CO2 Equiv” drop-down menus. The
new graphs are at the bottom of each drop-down list and labeled
“Comparative FF CO2 emissions by country” and “Comparative CO2e
emissions by country”, respectively.
For this new graph to be convenient, you need to show only one or at
most two countries at a time. This can be accomplished in several ways.
On the Welcome/main screen you may click the “Set graph defaults” button
and set the default to the one or two countries that you wish to view –
this setting changes the simulation default until you change it again.
You could also perform a “one-session” re-set in the control panel
screen using the “Select regions” button; this changes the settings
during the current simulation session only and then reverts to the
defaults when you “Return to main” and cycle through the welcome/main
The most temporary method for controlling what lines display on a
graph is to check and un-check the graph legend check boxes. This is
temporary – even switching between graphs reverts to the default. Note
that if you use the “Data table” or “Export Image/data” buttons, these
will export all the data represented in the graph legend, whether the
check boxes are checked or not.
There is a maximum of 12 runs before we run out of name space.
In the above screen shot, with the legends showing India and US for 3
conditions, “current_run” is shown because “Create new run” was used to
enter the control panel, and current_run is always shown in this mode.
To omit the current run, you would enter the control panel from the
welcome/main screen using the “Review runs” button selecting one of the
runs you wish to review, and then using the Load/unload run button in
the control panel to build up the set you wish.
The name of the file from which the data set is derived is appended
to the country name in [square brackets], so careful naming or renaming
of your saved data sets will create a more informative legend.
We have also corrected a bug which prevented the scroll bars from
appearing on the table entry for 15 region land use and FF emissions, as
well as one that affected forestry inputs in 6 region mode.
For new users, there is now a link to each of the tutorial videos
from the “Getting started” page and the “Getting started” quick guide.
Clicking the button opens your web browser to the link containing the
3 Dec 10
The update includes significant new capabilities, as well as improvements to make it easier to use.
There are 5 changes and additions that you’ll find at the interface
level that are new or improved. There are also improvements in the
underlying simulation program.
At the opening “Welcome” screen you may choose from a collection of
Reference scenarios, derived from EMF22 and SRES, and you may also
specify your own user-defined reference scenario. When you choose
“Create new run”, your chosen Ref scenario is used. The footer in the
graphs will reflect the name of the Reference scenario, as will the
legend in comparative graphs. There is also a reminder on the Control
panel page so you can easily see the active reference scenario.
Additionally, on the Welcome screen you’ll see two new buttons, “Contribution analysis” and “Uncertainty analysis”:
Contribution analysis takes a previously saved C-ROADS-CP run and
performs a leave-one-out analysis of the global data to determine the
contributions of each country/region to CO2 ppm, Temperature and
Uncertainty takes a previously saved run and performs an
uncertainty/sensitivity analysis using an analysis toolset file and
displays the results for multiple variables – see the Help? screen.
On the main Control screen, under the tab for Fossil Fuel CO2
emissions, you will find that the input controls now allow a new entry
mode for each country/region, by Carbon Intensity. This adds to the
previously available input modes, “Reference year” and “Reference
scenario.” Finally, the OFF mode cleans up the Fossil Fuel CO2 emissions
input interface when it is not in use. The “Target” boxes may be used
in any order, and their order of use is controlled by the setting of the
When you select the Land use emissions tab, you’ll find that you may
enter these globally, as before, or by country/region. There is a table
mode for the country/region entry that allows for easy review of the
settings or for easy entry for multiple country/regions.
The program will install in a folder, C-ROADS-CP v2, and so will not overwrite your previous version of C-ROADS from last year.