tommbendall · tommbendall · Jan 22, 2026 · Jan 22, 2026 · Jan 22, 2026 · Jan 23, 2026
diff --git a/applications/adjoint_tests/example/configuration.nml b/applications/adjoint_tests/example/configuration.nml
@@ -77,6 +77,8 @@ start_dump_filename='final_pert',
 &finite_element
 cellshape='quadrilateral',
 coord_order=1,
+coord_order_multigrid=1,
+coord_space='Wchi',
 coord_system='native',
 element_order_h=0,
 element_order_v=0,

diff --git a/applications/gravity_wave/example/configuration.nml b/applications/gravity_wave/example/configuration.nml
@@ -32,6 +32,8 @@ start_dump_filename = ''
 &finite_element
 cellshape = 'quadrilateral'
 coord_order = 1
+coord_order_multigrid = 1,
+coord_space = 'Wchi',
 coord_system = 'native'
 element_order_h = 0
 element_order_v = 0

diff --git a/applications/gravity_wave/unit-test/kernel/compute_q_operator_kernel_mod_test.pf b/applications/gravity_wave/unit-test/kernel/compute_q_operator_kernel_mod_test.pf
@@ -31,7 +31,7 @@ contains
   subroutine setUp( this )
 
     use finite_element_config_mod, only: cellshape_quadrilateral, &
-                                         coord_system_xyz
+                                         coord_system_xyz, coord_space_wchi
     use feign_config_mod,          only: feign_finite_element_config
 
     implicit none
@@ -42,6 +42,8 @@ contains
              cellshape=cellshape_quadrilateral, &
              coord_order=0_i_def,               &
              coord_system=coord_system_xyz,     &
+             coord_order_multigrid=1_i_def,     &
+             coord_space=coord_space_wchi,      &
              element_order_h=1_i_def,           &
              element_order_v=1_i_def,           &
              rehabilitate=.true.,               &

diff --git a/applications/gravity_wave/unit-test/kernel/initial_buoyancy_kernel_mod_test.pf b/applications/gravity_wave/unit-test/kernel/initial_buoyancy_kernel_mod_test.pf
@@ -28,7 +28,7 @@ contains
                                         stretching_method_linear
     use sci_chi_transform_mod,     only : init_chi_transforms
     use finite_element_config_mod, only : cellshape_quadrilateral, &
-                                          coord_system_xyz
+                                          coord_system_xyz, coord_space_wchi
     use feign_config_mod,          only : feign_base_mesh_config,           &
                                           feign_extrusion_config,           &
                                           feign_finite_element_config,      &
@@ -60,6 +60,8 @@ contains
     call feign_finite_element_config(           &
              cellshape=cellshape_quadrilateral, &
              coord_order=0_i_def,               &
+             coord_order_multigrid=1_i_def,     &
+             coord_space=coord_space_wchi,      &
              coord_system=coord_system_xyz,     &
              element_order_h=0_i_def,           &
              element_order_v=0_i_def,           &

diff --git a/applications/gungho_model/example/configuration.nml b/applications/gungho_model/example/configuration.nml
@@ -48,6 +48,8 @@ start_dump_filename='',
 &finite_element
 cellshape='quadrilateral',
 coord_order=1,
+coord_order_multigrid=1,
+coord_space='Wtheta',
 coord_system='native',
 element_order_h=0,
 element_order_v=0,

diff --git a/applications/gungho_model/lam_example/baroclinic/config_driver.nml b/applications/gungho_model/lam_example/baroclinic/config_driver.nml
@@ -43,6 +43,8 @@ lbc_filename='',
 &finite_element
 cellshape='quadrilateral',
 coord_order=1,
+coord_order_multigrid=1,
+coord_space='Wtheta',
 coord_system='native',
 element_order_h=0,
 element_order_v=0,

diff --git a/applications/gungho_model/lam_example/baroclinic/config_lam.nml b/applications/gungho_model/lam_example/baroclinic/config_lam.nml
@@ -59,6 +59,8 @@ lbc_filename='lbc',
 &finite_element
 cellshape='quadrilateral',
 coord_order=1,
+coord_order_multigrid=1,
+coord_space='Wtheta',
 coord_system='native',
 element_order_h=0,
 element_order_v=0,

diff --git a/applications/gungho_model/lam_example/straka/config_driver.nml b/applications/gungho_model/lam_example/straka/config_driver.nml
@@ -45,6 +45,8 @@ lbc_filename='',
 &finite_element
 cellshape='quadrilateral',
 coord_order=1,
+coord_order_multigrid=1,
+coord_space='Wtheta',
 coord_system='native',
 element_order_h=0,
 element_order_v=0,

diff --git a/applications/gungho_model/lam_example/straka/config_lam.nml b/applications/gungho_model/lam_example/straka/config_lam.nml
@@ -57,6 +57,8 @@ lbc_filename='lbc',
 &finite_element
 cellshape='quadrilateral',
 coord_order=1,
+coord_order_multigrid=1,
+coord_space='Wtheta',
 coord_system='native',
 element_order_h=0,
 element_order_v=0,

diff --git a/applications/jedi_lfric_tests/example/configuration.nml b/applications/jedi_lfric_tests/example/configuration.nml
@@ -78,6 +78,8 @@ start_dump_filename='final_pert',
 cellshape='quadrilateral',
 coord_order=1,
 coord_system='native',
+coord_order_multigrid=1,
+coord_space='Wchi',
 element_order_h=0,
 element_order_v=0,
 rehabilitate=.true.,

diff --git a/applications/jedi_lfric_tests/example_forecast/configuration.nml b/applications/jedi_lfric_tests/example_forecast/configuration.nml
@@ -76,6 +76,8 @@ start_dump_filename='',
 &finite_element
 cellshape='quadrilateral',
 coord_order=1,
+coord_order_multigrid=1,
+coord_space='Wchi',
 coord_system='native',
 element_order_h=0,
 element_order_v=0,

diff --git a/applications/jedi_lfric_tests/example_forecast_pseudo/configuration.nml b/applications/jedi_lfric_tests/example_forecast_pseudo/configuration.nml
@@ -47,6 +47,8 @@ stretching_method='smooth',
 &finite_element
 cellshape='quadrilateral',
 coord_order=1,
+coord_order_multigrid=1,
+coord_space='Wchi',
 coord_system='native',
 element_order_h=0,
 element_order_v=0,

diff --git a/applications/jedi_lfric_tests/example_forecast_pseudo/configuration_op.nml b/applications/jedi_lfric_tests/example_forecast_pseudo/configuration_op.nml
@@ -47,6 +47,8 @@ stretching_method='smooth',
 &finite_element
 cellshape='quadrilateral',
 coord_order=1,
+coord_order_multigrid=1,
+coord_space='Wchi',
 coord_system='native',
 element_order_h=0,
 element_order_v=0,

diff --git a/applications/jedi_lfric_tests/example_id_tlm_tests/configuration.nml b/applications/jedi_lfric_tests/example_id_tlm_tests/configuration.nml
@@ -111,6 +111,8 @@ start_dump_filename='',
 &finite_element
 cellshape='quadrilateral',
 coord_order=1,
+coord_order_multigrid=1,
+coord_space='Wchi',
 coord_system='native',
 element_order_h=0,
 element_order_v=0,

diff --git a/applications/jedi_lfric_tests/example_tlm_forecast_tl/configuration.nml b/applications/jedi_lfric_tests/example_tlm_forecast_tl/configuration.nml
@@ -111,6 +111,8 @@ start_dump_filename='',
 &finite_element
 cellshape='quadrilateral',
 coord_order=1,
+coord_order_multigrid=1,
+coord_space='Wchi',
 coord_system='native',
 element_order_h=0,
 element_order_v=0,

diff --git a/applications/jedi_lfric_tests/example_tlm_forecast_tl/configuration_op.nml b/applications/jedi_lfric_tests/example_tlm_forecast_tl/configuration_op.nml
@@ -106,6 +106,8 @@ start_dump_filename='',
 &finite_element
 cellshape='quadrilateral',
 coord_order=1,
+coord_order_multigrid=1,
+coord_space='Wchi',
 coord_system='native',
 element_order_h=0,
 element_order_v=0,

diff --git a/applications/jedi_lfric_tests/example_tlm_tests/configuration.nml b/applications/jedi_lfric_tests/example_tlm_tests/configuration.nml
@@ -111,6 +111,8 @@ start_dump_filename='',
 &finite_element
 cellshape='quadrilateral',
 coord_order=1,
+coord_order_multigrid=1,
+coord_space='Wchi',
 coord_system='native',
 element_order_h=0,
 element_order_v=0,

diff --git a/...ns/jedi_lfric_tests/integration-test/algorithm/resources/algorithm_test_configuration.nml b/...ns/jedi_lfric_tests/integration-test/algorithm/resources/algorithm_test_configuration.nml
@@ -22,6 +22,8 @@ element_order_h=0,
 element_order_v=0,
 rehabilitate=.true.,
 coord_order=1
+coord_order_multigrid=1,
+coord_space='Wchi',
 coord_system='native'
 /
 

diff --git a/applications/jules/example/configuration.nml b/applications/jules/example/configuration.nml
@@ -46,6 +46,8 @@ start_dump_filename='',
 &finite_element
 cellshape='quadrilateral',
 coord_order=1,
+coord_order_multigrid=1,
+coord_space='Wchi',
 coord_system='native',
 element_order_h=0,
 element_order_v=0,

diff --git a/applications/lfric2lfric/example/configuration.nml b/applications/lfric2lfric/example/configuration.nml
@@ -39,6 +39,8 @@ element_order_h         = 0,
 element_order_v         = 0,
 rehabilitate            = .true.,
 coord_order             = 1,
+coord_order_multigrid   = 1,
+coord_space             = 'Wchi',
 /
 
 &io

diff --git a/applications/lfric_atm/example/configuration.nml b/applications/lfric_atm/example/configuration.nml
@@ -147,6 +147,8 @@ start_dump_filename='',
 &finite_element
 cellshape='quadrilateral',
 coord_order=1,
+coord_order_multigrid=1,
+coord_space='Wchi',
 coord_system='native',
 element_order_h=0,
 element_order_v=0,

diff --git a/applications/lfric_coupled/example/configuration.nml b/applications/lfric_coupled/example/configuration.nml
@@ -78,6 +78,8 @@ start_dump_filename='',
 &finite_element
 cellshape='quadrilateral',
 coord_order=1,
+coord_order_multigrid=1,
+coord_space='Wtheta',
 coord_system='native',
 element_order_h=0,
 element_order_v=0,

diff --git a/applications/linear_model/example/configuration.nml b/applications/linear_model/example/configuration.nml
@@ -48,6 +48,8 @@ ls_filename='',
 &finite_element
 cellshape='quadrilateral',
 coord_order=1,
+coord_order_multigrid=1,
+coord_space='Wchi',
 coord_system='native',
 element_order_h=0,
 element_order_v=0,

diff --git a/applications/linear_model/example_file/config_linear.nml b/applications/linear_model/example_file/config_linear.nml
@@ -45,6 +45,8 @@ ls_filename='ls',
 &finite_element
 cellshape='quadrilateral',
 coord_order=1,
+coord_order_multigrid=1,
+coord_space='Wchi',
 coord_system='native',
 element_order_h=0,
 element_order_v=0,

diff --git a/applications/linear_model/example_file/config_nonlinear.nml b/applications/linear_model/example_file/config_nonlinear.nml
@@ -43,6 +43,8 @@ start_dump_filename='',
 &finite_element
 cellshape='quadrilateral',
 coord_order=1,
+coord_order_multigrid=1,
+coord_space='Wchi',
 coord_system='native',
 element_order_h=0,
 element_order_v=0,

diff --git a/applications/name_transport/example/configuration.nml b/applications/name_transport/example/configuration.nml
@@ -32,6 +32,8 @@ element_order_h=0,
 element_order_v=0,
 rehabilitate=.true.,
 coord_order=1,
+coord_order_multigrid=1,
+coord_space='Wchi',
 coord_system='native'
 vorticity_in_w1=.true.,
 /

diff --git a/applications/name_transport/unit-test/kernel/set_name_field_kernel_mod_test.pf b/applications/name_transport/unit-test/kernel/set_name_field_kernel_mod_test.pf
@@ -37,7 +37,7 @@ contains
     use extrusion_config_mod,      only : method_uniform, &
                                           stretching_method_linear
     use finite_element_config_mod, only : cellshape_quadrilateral, &
-                                          coord_system_xyz
+                                          coord_system_xyz, coord_space_wchi
     use feign_config_mod,          only : feign_base_mesh_config,          &
                                           feign_extrusion_config,          &
                                           feign_finite_element_config,     &
@@ -67,6 +67,8 @@ contains
     call feign_finite_element_config(           &
              cellshape=cellshape_quadrilateral, &
              coord_order=0_i_def,               &
+             coord_order_multigrid=1_i_def,     &
+             coord_space=coord_space_wchi,      &
              coord_system=coord_system_xyz,     &
              element_order_h=0_i_def,           &
              element_order_v=0_i_def,           &

diff --git a/applications/ngarch/example/configuration_bl.nml b/applications/ngarch/example/configuration_bl.nml
@@ -116,6 +116,8 @@ surface_frac_ancil_path='vegetation/fractions_cci/qrparm.veg.frac.fixed',
 &finite_element
 cellshape='quadrilateral',
 coord_order=1,
+coord_order_multigrid=1,
+coord_space='Wchi',
 coord_system='native',
 element_order_h=0,
 element_order_v=0,

diff --git a/applications/ngarch/example/configuration_casim.nml b/applications/ngarch/example/configuration_casim.nml
@@ -160,6 +160,8 @@ surface_frac_ancil_path='vegetation/fractions_cci/qrparm.veg.frac.fixed',
 &finite_element
 cellshape='quadrilateral',
 coord_order=1,
+coord_order_multigrid=1,
+coord_space='Wchi',
 coord_system='native',
 element_order_h=0,
 element_order_v=0,

diff --git a/applications/shallow_water/example/configuration.nml b/applications/shallow_water/example/configuration.nml
@@ -276,6 +276,8 @@ start_dump_directory = ''
         ! These do not need changing
 cellshape       = 'quadrilateral'
 coord_order     = 1
+coord_order_multigrid = 1
+coord_space     = 'Wchi'
 coord_system    = 'native'
 element_order_h = 0
 element_order_v = 0

diff --git a/applications/shallow_water/unit-test/kernel/initial_geopot_kernel_mod_test.pf b/applications/shallow_water/unit-test/kernel/initial_geopot_kernel_mod_test.pf
@@ -51,7 +51,7 @@ contains
                                           feign_planet_config,         &
                                           feign_shallow_water_settings_config
     use finite_element_config_mod, only : cellshape_quadrilateral, &
-                                          coord_system_xyz
+                                          coord_system_xyz, coord_space_wchi
     use sci_chi_transform_mod,     only : init_chi_transforms
     use shallow_water_settings_config_mod,                           &
                                    only : momentum_form_momentum,    &
@@ -77,6 +77,8 @@ contains
 
     call feign_finite_element_config( cellshape=cellshape_quadrilateral, &
                                       coord_order=0_i_def,               &
+                                      coord_order_multigrid=1_i_def,     &
+                                      coord_space=coord_space_wchi,      &
                                       coord_system=coord_system_xyz,     &
                                       element_order_h=0_i_def,           &
                                       element_order_v=0_i_def,           &

diff --git a/applications/shallow_water/unit-test/kernel/initial_swe_buoyancy_kernel_mod_test.pf b/applications/shallow_water/unit-test/kernel/initial_swe_buoyancy_kernel_mod_test.pf
@@ -52,7 +52,7 @@ contains
                                          feign_shallow_water_settings_config
     use finite_element_config_mod, &
                                   only : cellshape_quadrilateral, &
-                                         coord_system_xyz
+                                         coord_system_xyz, coord_space_wchi
     use sci_chi_transform_mod,    only : init_chi_transforms
     use shallow_water_settings_config_mod, &
                                   only : momentum_form_momentum,    &
@@ -78,6 +78,8 @@ contains
 
     call feign_finite_element_config( cellshape=cellshape_quadrilateral, &
                                       coord_order=0_i_def,               &
+                                      coord_order_multigrid=1_i_def,     &
+                                      coord_space=coord_space_wchi,      &
                                       coord_system=coord_system_xyz,     &
                                       element_order_h=0_i_def,           &
                                       element_order_v=0_i_def,           &

diff --git a/applications/shallow_water/unit-test/kernel/initial_swe_tracer_kernel_mod_test.pf b/applications/shallow_water/unit-test/kernel/initial_swe_tracer_kernel_mod_test.pf
@@ -51,7 +51,7 @@ contains
                                           feign_planet_config,         &
                                           feign_shallow_water_settings_config
     use finite_element_config_mod, only : cellshape_quadrilateral, &
-                                          coord_system_xyz
+                                          coord_system_xyz, coord_space_wchi
     use sci_chi_transform_mod,     only : init_chi_transforms
     use shallow_water_settings_config_mod,                           &
                                    only : momentum_form_momentum,    &
@@ -77,6 +77,8 @@ contains
 
     call feign_finite_element_config( cellshape=cellshape_quadrilateral, &
                                       coord_order=0_i_def,               &
+                                      coord_order_multigrid=1_i_def,     &
+                                      coord_space=coord_space_wchi,      &
                                       coord_system=coord_system_xyz,     &
                                       element_order_h=0_i_def,           &
                                       element_order_v=0_i_def,           &

diff --git a/applications/shallow_water/unit-test/kernel/initial_swe_u_kernel_mod_test.pf b/applications/shallow_water/unit-test/kernel/initial_swe_u_kernel_mod_test.pf
@@ -57,7 +57,8 @@ contains
                                                  feign_shallow_water_test_coeff_config, &
                                                  feign_shallow_water_settings_config
     use finite_element_config_mod,         only: cellshape_quadrilateral, &
-                                                 coord_system_xyz
+                                                 coord_system_xyz,        &
+                                                 coord_space_wchi
     use shallow_water_settings_config_mod, only: momentum_form_momentum,     &
                                                  swe_test_swe_gaussian_hill, &
                                                  time_scheme_semi_implicit
@@ -76,6 +77,8 @@ contains
     call feign_finite_element_config( cellshape=cellshape_quadrilateral, &
                                       coord_order=0_i_def,               &
                                       coord_system=coord_system_xyz,     &
+                                      coord_order_multigrid=1_i_def,     &
+                                      coord_space=coord_space_wchi,      &
                                       element_order_h=0_i_def,           &
                                       element_order_v=0_i_def,           &
                                       rehabilitate=.true.,               &

diff --git a/applications/solver/example/configuration.nml b/applications/solver/example/configuration.nml
@@ -27,6 +27,8 @@ element_order_h=0,
 element_order_v=0,
 rehabilitate=.true.,
 coord_order=1,
+coord_order_multigrid=1,
+coord_space='Wchi',
 coord_system='native',
 /