Default CESM Grids

The project compares the behavior of POP2 ensembles using two different grid configurations: a low-resolution, eddy-parameterizing grid and a high-resolution, eddy-resolving grid.

The default available atmospheric grids for each are listed on the CESM Grid Resolution Definitions and are reproduced below.

Low-resolution, eddy parameterizing

The CESM grid used for the Coupled Model Intercomparison Project (CMIP) is a 1° grid with a displaced Greenland pole. It has two configurations within CESM: g16 and g17.

This is the same ocean/ice grid used for the CESM large ensemble and the DART CAM6 Reanalysis.

Each of these grids has been coupled to different atmospheric and land grids, which are listed in the Default configurations table rows below.

Grid	g16
Grid type	gx1v6 is displaced Greenland pole v6 1-deg grid
Domain file	/glade/p/cesm/cseg/inputdata/share/domains/domain.ocn.gx1v6.090206.nc
Domain
Default configurations	f02_g16, f05_g16, f09_g16, f19_g16, ne120_g16, ne240_f02_g16, ne30_f09_g16, ne30_f19_g16, ne30_g16, ne60_g16, T62_g16

Grid	g17
Grid type	gx1v7 is displaced Greenland pole 1-deg grid with Caspian as a land feature
Domain file	/glade/p/cesm/cseg/inputdata/share/domains/domain.ocn.gx1v7.151008.nc
Domain
Default configurations	f02_g17, f05_g17, f09_g17, f19_g17, f19_g17_r01, f19_g17_r05, g17_g17, ne0CONUSne30x8_g17, ne120_g17, ne120pg3_g17, ne16_g17, ne240_f02_g17, ne30_f09_g17, ne30_f19_g17, ne30_g17, ne30pg3_g17, ne60_g17, T62_g17, TL319_g17, TL639_g17

High-resolution, eddy resolving

The ~0.1° ocean/sea ice grid has two different configuratons within CESM: t12 and t13. Each of these grids has been coupled to different atmospheric and land grids. This is the same ocean/ice grid used in Johnson et al. (2016) and Deppenmeier et al. (2021).

Each of these grids has been coupled to different atmospheric and land grids, which are listed in the Default configurations table rows below.

Grid	t12
Grid type	tx0.1v2 is tripole v2 1/10-deg grid
Domain file	/glade/p/cesm/cseg/inputdata/share/domains/domain.ocn.tx0.1v2.161014.nc
Domain
Default configurations	f02_t12, f05_t12, ne120_t12, ne240_t12, T341_f02_t12, T62_t12

Grid	t13
Grid type	tx0.1v3 is tripole v3 1/10-deg grid with Caspian as a land feature
Domain file	/glade/p/cesm/cseg/inputdata/share/domains/domain.ocn.tx0.1v3.170730.nc
Domain
Default Configurations	ne120pg3_t13, T62_t13, TL319_t13