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Subsections

1.2 Inputs

A simulation is defined by:

  1. An initial state: initial values for temperature, $CO_{2}$ concentration, sea level and ice sheet extent;
  2. A duration: number of years of simulation;
  3. A simulation name and its color;
  4. Parameters determining the behavior of the model during the simulation.

1.2.1 Initial state

In the interface, the initial state can be chosen in the page following the home page (figures 1,2). The possible initial states are:

  1. Today's world: The temperature is 15.3°C, the $CO_{2}$ concentration is 405 ppm,$CO_{2}$ emissions are 8 GtC/year, the sea level is 0 m.
  2. The pre-industrial world: The climatic variables are those of the pre-industrial era: the temperature is 14.4 ° C, the $CO_{2}$ concentration is 280 ppm, the sea level of -0.2m , $CO_{2}$ emissions are null.
  3. The final state of the previous simulation: This allows to continue the previous simulation.
  4. The final state of a saved simulation: If a final state of a simulation has already been saved, it is possible to start a simulation with this state. This allows to continue an earlier simulation.

1.2.2 Duration

The duration can be chosen in the same page as the initial state (figures 1,2). It can be between 100 years and 10 million years. The deadline depends on the processes that we wants to study. For example, to study current global warming, durations of 100 to 500 years are recommended. To study the glacial-interglacial variations in which the ice sheets are at play, durations of tens to hundreds of thousands of years are recommended. To study continental weathering, durations of several million years are recommended.

Figure 1: Screenshot of the home page of SimClimat with Windows.
\includegraphics[width=0.8\textwidth]{figs/Capture_home_eng}

Figure 2: Screenshot of the page where the intial state and the duration can be chosen, with Windows.
\includegraphics[width=0.8\textwidth]{figs/Capture_choixinit_eng}

1.2.3 Color and name

In the interface, the color and name can be chosen in the second page (figure 3). They can still be modified once the simulation is launched using the ``curve'' icon (figure 5).

Figure 3: Screenshot of the page where the simulation name and color can be chosen, withWindows.
\includegraphics[width=0.8\textwidth]{figs/Capture_choixcouleur_eng}

1.2.4 Parameters

We can tune 3 kinds of parameters:

  1. Astronomical parameters (example in section 3.2.3):
  2. $CO_{2}$ concentration or emissions: we can choose between 2 types of simulations:
  3. Climate feedbacks: Four types of climate feedback are taken into account and can be optionally tuned or unplugged by the user:
For each parameter, we can show a small explanatory text and/or a schematic (example: figure 4).

Once the simulation is launched, we can check the value of all parameters using the ``eye'' icon, or modify parameters with the ``key'' icon (figure 7).

Figure 4: Screenshot of the page where parameters associated with the carbon cycle can be chosen, on Linux.
\includegraphics[width=0.8\textwidth]{figs/Capture_choixcarbone_eng}


next up previous contents
Next: 1.3 Outputs Up: 1 Graphical interface Previous: 1.1 Supported platforms   Contents
Camille RISI 2023-07-24