October 2025 Monthly Summary for FESOM/fesom2: Achieved data-accuracy improvement by correcting a_ice unit representation in outputs from percent to fraction, ensuring outputs correctly reflect the underlying data type and reducing ambiguity in downstream analysis. The fix was implemented in commit 71df86abdd6182dc5936ea15201f7b671a3b4d83 with a descriptive message: 'modifying a_ice name since it is a fraction and not a %'. This change enhances data integrity, improves user trust, and minimizes potential misinterpretation in reporting and downstream workflows. No user-facing feature changes; this backend refinement lays groundwork for clearer interfaces and future data type consistency. Also reinforced code clarity by aligning naming with semantics and maintainability in the FESOM/fesom2 repository.