diff --git a/src/callbacks/callbacks.jl b/src/callbacks/callbacks.jl
index 257ee50f42..8bd6a11844 100644
--- a/src/callbacks/callbacks.jl
+++ b/src/callbacks/callbacks.jl
@@ -134,7 +134,7 @@ NVTX.@annotate function rrtmgp_model_callback!(integrator)
         radiation_mode isa RRTMGPI.GrayRadiation ||
         radiation_mode isa RRTMGPI.ClearSkyRadiation
     )
-        ᶜΔz = Fields.local_geometry_field(Y.c).∂x∂ξ.components.data.:9
+        ᶜΔz = Fields.Δz_field(Y.c)
         ᶜlwp = Fields.array2field(
             rrtmgp_model.center_cloud_liquid_water_path,
             axes(Y.c),
@@ -158,7 +158,7 @@ NVTX.@annotate function rrtmgp_model_callback!(integrator)
 
     if !(radiation_mode isa RRTMGPI.GrayRadiation)
         if radiation_mode.aerosol_radiation
-            ᶜΔz = Fields.local_geometry_field(Y.c).∂x∂ξ.components.data.:9
+            ᶜΔz = Fields.Δz_field(Y.c)
             ᶜaero_conc = Fields.array2field(
                 rrtmgp_model.center_aerosol_column_mass_density,
                 axes(Y.c),
diff --git a/src/parameterized_tendencies/radiation/radiation.jl b/src/parameterized_tendencies/radiation/radiation.jl
index 3cd726c23d..bd1c3ef623 100644
--- a/src/parameterized_tendencies/radiation/radiation.jl
+++ b/src/parameterized_tendencies/radiation/radiation.jl
@@ -148,7 +148,7 @@ function radiation_model_cache(
                     ice_roughness = 2,
                 )
                 ᶜz = Fields.coordinate_field(Y.c).z
-                ᶜΔz = Fields.local_geometry_field(Y.c).∂x∂ξ.components.data.:9
+                ᶜΔz = Fields.Δz_field(Y.c)
                 if idealized_clouds # icy cloud on top and wet cloud on bottom
                     # TODO: can we avoid using DataLayouts with this?
                     #     `ᶜis_bottom_cloud = similar(ᶜz, Bool)`