From 748813173586f22aee61d83983f0feab24ba6687 Mon Sep 17 00:00:00 2001
From: Manuel Schlund <32543114+schlunma@users.noreply.github.com>
Date: Tue, 30 Apr 2024 17:43:13 +0200
Subject: [PATCH] Ignored iris warnings about global attributes (#2400)

---
 esmvalcore/preprocessor/_io.py | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/esmvalcore/preprocessor/_io.py b/esmvalcore/preprocessor/_io.py
index 5894b73ace..900d026943 100644
--- a/esmvalcore/preprocessor/_io.py
+++ b/esmvalcore/preprocessor/_io.py
@@ -432,7 +432,19 @@ def save(cubes,
             logger.debug('Changing var_name from %s to %s', cube.var_name,
                          alias)
             cube.var_name = alias
-    iris.save(cubes, **kwargs)
+
+    # Ignore some warnings when saving
+    with catch_warnings():
+        filterwarnings(
+            'ignore',
+            message=(
+                ".* is being added as CF data variable attribute, but .* "
+                "should only be a CF global attribute"
+            ),
+            category=UserWarning,
+            module='iris',
+        )
+        iris.save(cubes, **kwargs)
 
     return filename