diff --git a/compass/ocean/mesh/remap_topography.cfg b/compass/ocean/mesh/remap_topography.cfg
index 53cf2cd3f..de659dabd 100644
--- a/compass/ocean/mesh/remap_topography.cfg
+++ b/compass/ocean/mesh/remap_topography.cfg
@@ -2,7 +2,7 @@
 [remap_topography]
 
 # the name of the topography file in the bathymetry database
-topo_filename = BedMachineAntarctica_v3_and_GEBCO_2023_0.0125_degree_20230831.nc
+topo_filename = BedMachineAntarctica_v3_and_GEBCO_2023_0.0125_degree_20240611.nc
 
 # variable names in topo_filename
 lon_var = lon
@@ -12,6 +12,7 @@ ice_thickness_var = thickness
 ice_frac_var = ice_mask
 grounded_ice_frac_var = grounded_mask
 ocean_frac_var = ocean_mask
+bathy_frac_var = bathymetry_mask
 
 # the description to include in metadata
 description = Bathymetry is from GEBCO 2023, combined with BedMachine
diff --git a/compass/ocean/mesh/remap_topography.py b/compass/ocean/mesh/remap_topography.py
index 985bb7278..e1c164b93 100644
--- a/compass/ocean/mesh/remap_topography.py
+++ b/compass/ocean/mesh/remap_topography.py
@@ -135,7 +135,8 @@ def run(self):
                   'ice_thickness_var': 'landIceThkObserved',
                   'ice_frac_var': 'landIceFracObserved',
                   'grounded_ice_frac_var': 'landIceGroundedFracObserved',
-                  'ocean_frac_var': 'oceanFracObserved'}
+                  'ocean_frac_var': 'oceanFracObserved',
+                  'bathy_frac_var': 'bathyFracObserved'}
 
         for option, out_var in rename.items():
             in_var = config.get('remap_topography', option)
@@ -146,11 +147,12 @@ def run(self):
 
         # make sure fractions don't exceed 1
         for var in ['landIceFracObserved', 'landIceGroundedFracObserved',
-                    'landIceFloatingFracObserved', 'oceanFracObserved']:
+                    'landIceFloatingFracObserved', 'oceanFracObserved',
+                    'bathyFracObserved']:
             ds_out[var] = np.minimum(ds_out[var], 1.)
 
         # renormalize elevation variables
-        norm = ds_out.oceanFracObserved
+        norm = ds_out.bathyFracObserved
         valid = norm > renorm_threshold
         for var in ['bed_elevation', 'landIceThkObserved']:
             ds_out[var] = xr.where(valid, ds_out[var] / norm, 0.)
diff --git a/compass/ocean/tests/global_ocean/mesh/__init__.py b/compass/ocean/tests/global_ocean/mesh/__init__.py
index da9884177..280bf49b9 100644
--- a/compass/ocean/tests/global_ocean/mesh/__init__.py
+++ b/compass/ocean/tests/global_ocean/mesh/__init__.py
@@ -147,6 +147,7 @@ def configure(self, config=None):
             description = 'Bathymetry is from GEBCO 2022, combined with ' \
                           'BedMachine Antarctica v2 around Antarctica.'
             config.set('remap_topography', 'topo_filename', filename)
+            config.set('remap_topography', 'bathy_frac_var', 'ocean_mask')
             config.set('remap_topography', 'description', description)
             config.set('remap_topography', 'ntasks', '64')
             config.set('remap_topography', 'min_tasks', '4')