6.1. CMEPS Application Independent Attributes

The following attributes are obtained from the respective driver and available to all components that the driver uses. In the case of NEMS, the NEMS driver ingests these attributes from the nems.configure file. In the case of CESM, the CESM driver ingests these attributes from the nuopc.runconfig file. The list of attributes below are separated into application independent attributes and at this time additional attributes required by CESM. There are no NEMS-specific attributes required by the NEMS application.

6.1.1. General

coupling_mode (required)

The coupling_mode attribute determines which esmFlds_exchange_xxx_mod.F90 and fd_xxx.yaml is used by CMEPS and is also leveraged in some of the custom calculations in the prep modules.

The currently supported values for coupling_mode are cesm, nems_orig, nems_frac and hafs.

6.1.2. Scalar attributes

ScalarFieldCount

The maximum number of scalars that are going to be communicated between the mediator and a component. Currently scalar values are put into a field bundle that only contains an undistributed dimension equal to the size of ScalarFieldCount and communicated between the component and the mediator on the master task of each component.

ScalarFieldName (required)

This is the name of the scalar field bundle. By default it is cpl_scalars.

ScalarFieldIdxGridNX, ScalarFieldIdxGridNY (required)

The global number of longitude and latitude points. For unstructured grids:

ScalarFieldIdxGridNY = 1
ScalarFieldIdxGridNX = global size of mesh

For cases where ScalarFieldIdxGridNY is not 1, this scalar data is needed by the mediator for the history output.

ScalarFieldIdxNextSwCday (optional)

Send by the atmosphere component to specify the calendar day of its next short wave computation. This is subsequently used by other components (e.g. cesm-land and sea-ice) in determining the zenith angle for its albedo calculation. It is also used in the mediator routine med_phases_ocnalb_mod.F90 to determine the zenith angle in the ocean albedo calculation.

6.1.3. Mediator history and restart attributes

history_option, history_n (required)

Determines the write frequency for a mediator history file (see mediator history writes).

restart_option, restart_n (required)

Determines the write frequency for a mediator restart file (see mediator restart writes).

read_restart (required)

Determines if a mediator restart file is read in.