diff --git a/scripts/exgdas_global_marine_analysis_prep.py b/scripts/exgdas_global_marine_analysis_prep.py
index 2d9235d9b..4e0635be2 100755
--- a/scripts/exgdas_global_marine_analysis_prep.py
+++ b/scripts/exgdas_global_marine_analysis_prep.py
@@ -123,13 +123,13 @@ def gen_bkg_list(bkg_path, out_path, window_begin=' ', yaml_name='bkg.yaml', ice
     bkg_date = window_begin
 
     # Construct list of background file names
-    RUN = os.getenv('RUN')
+    GDUMP = os.getenv('GDUMP')
     cyc = str(os.getenv('cyc')).zfill(2)
     gcyc = str((int(cyc) - 6) % 24).zfill(2)  # previous cycle
     fcst_hrs = list(range(3, 10, dt_pseudo))
     files = []
     for fcst_hr in fcst_hrs:
-        files.append(os.path.join(bkg_path, f'{RUN}.t'+gcyc+'z.ocnf'+str(fcst_hr).zfill(3)+'.nc'))
+        files.append(os.path.join(bkg_path, f'{GDUMP}.t'+gcyc+'z.ocnf'+str(fcst_hr).zfill(3)+'.nc'))
 
     # Identify the ocean background that will be used for the  vertical coordinate remapping
     ocn_filename_ic = os.path.splitext(os.path.basename(files[0]))[0]+'.nc'
@@ -506,13 +506,14 @@ def find_clim_ens(input_date):
 ################################################################################
 # Copy initial condition
 ics_list = []
+GDUMP = os.getenv('GDUMP')
 # ocean IC's
-mom_ic_src = glob.glob(os.path.join(bkg_dir, f'{RUN}.*.ocnf003.nc'))[0]
+mom_ic_src = glob.glob(os.path.join(bkg_dir, f'{GDUMP}.*.ocnf003.nc'))[0]
 mom_ic_dst = os.path.join(anl_dir, 'INPUT', 'MOM.res.nc')
 ics_list.append([mom_ic_src, mom_ic_dst])
 
 # seaice IC's
-cice_ic_src = glob.glob(os.path.join(bkg_dir, f'{RUN}.*.agg_icef003.nc'))[0]
+cice_ic_src = glob.glob(os.path.join(bkg_dir, f'{GDUMP}.*.agg_icef003.nc'))[0]
 cice_ic_dst = os.path.join(anl_dir, 'INPUT', 'cice.res.nc')
 ics_list.append([cice_ic_src, cice_ic_dst])
 FileHandler({'copy': ics_list}).sync()