diff --git a/axiom/data/drs.json b/axiom/data/drs.json
index 0abef04..98476e5 100644
--- a/axiom/data/drs.json
+++ b/axiom/data/drs.json
@@ -70,6 +70,7 @@
         "6H": "6hr",
         "fx": "fx"
     },
+    "output_format": "NETCDF4",
     "encoding": {
         "variables": {
             "dtype": "float32",
diff --git a/axiom/drs/__init__.py b/axiom/drs/__init__.py
index d6506b0..49ad4f8 100644
--- a/axiom/drs/__init__.py
+++ b/axiom/drs/__init__.py
@@ -464,10 +464,13 @@ def postprocess(_ds, *args, **kwargs):
             logger.info('Waiting for computations to finish.')
             progress(_ds)
 
+        # Get the output format from config
+        output_format = config.get('output_format', 'NETCDF4')
+        
         logger.debug(f'Writing {output_filepath}')
         write = _ds.to_netcdf(
             output_filepath,
-            format='NETCDF4',
+            format=output_format,
             encoding=encoding,
             unlimited_dims=['time']
         )