Comparing 2D fields - how do you quantify similarity?
Model data seta can vary in several ways from a reference data set. Taylor diagrams visually compare multiple datasets output to a reference dataset (e.g., model experiments to observations). This is done by exploiting the geometric relationship between centered RMS, correlation, and standard deviation when computing differences between datasets. Several software packages exist to produce Taylor diagrams.
wiki: https://en.wikipedia.org/wiki/Taylor_diagram
publication: https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2000JD900719
python, e.g.: https://pypi.org/project/SkillMetrics/