PIControl

The optional picontrol parameter is a listdictionary of preindustrial values. By default, picontrol is NULLNone, which runs the simulation with the default preindustrial values. No matter what preindustrial values are chosen, the model will set the preindustrial surface-ocean alkalinity and deep-ocean dissolved inorganic carbon to values that guarantee preindustrial equilibrium. The values that can be set within the picontrol listdictionary are:

• Tatm, Tdeep: Preindustrial mean surface-air temperature and mean deep-ocean surface temperature in K. Default values are 288 for Tatm and 278 for Tdeep.
• CO2: Preindustrial molecular number concentration of atmospheric CO₂. Default value is 280e-6.
• Adeep: Preindustrial alkalinity of the deep ocean in mol/kg. Default value is 2.35e-3.
• Fwc, Fws: Preindustrial rates, in GtC/yr, of weathering of terrestrial carbonates (Fwc; default of 0.1) and silicates (Fws; default of 0.1).