Setting Orbital Parameters

cesm1.1 -- http://www.cesm.ucar.edu/models/cesm1.1/cesm/doc/modelnl/nl_drv.html

cesm1.2 -- http://www.cesm.ucar.edu/models/cesm1.2/cesm/doc/modelnl/nl_drv.html

 Coupler definitions: 

orb_mode (char)

orbital model setting. this sets how the orbital mode will be configured. "fixed_year" uses the orb_iyear and other orb inputs are ignored. In this mode, the orbital parameters are constant and based on the year. "variable_year" uses the orb_iyear and orb_iyear_align. In this mode, the orbital parameters vary as the model year advances and the model year orb_iyear_align has the equivalent orbital year of orb_iyear. "fixed_parameters" uses the orb_eccen, orb_mvelp, and orb_obliq to set the orbital parameters which then remain constant through the model integration. set by ORBITAL_MODE in env_run.xml. [fixed_year, variable_year, fixed_parameters] default='fixed_year'.


NOTE:  This parameter is relatively new and may cause your run to crash in early CESM tags.  If so, remove orb_mode from cpl.buildnml.csh and resubmit.

orb_iyear (int)

year of orbit, used when orb_mode is fixed_year or variable_year. set by ORBITAL_YEAR in env_run.xml. default=unset

orb_iyear_align (int)

model year associated with orb_iyear when orb_mode is variable_year. set by ORBITAL_YEAR_ALIGN in env_run.xml. default=unset

orb_eccen (r8)

eccentricity of orbit, used when orb_mode is fixed_parameters. default=unset

orb_mvelp (r8)

location of vernal equinox in longitude degrees, used when orb_mode is fixed_parameters. default=unset

orb_obliq (r8)

obliquity of orbit in degrees, used when orb_mode is fixed_parameters. default=unset