Vertical CO surfaces as a probe for protoplanetary disk mass and carbon depletion T. Paneque-Carreño, A. Miotello, E. F. van Dishoeck, G. Rosotti and B. Tabone A&A, 698 (2025) A231 Published online: 18 June 2025 DOI: 10.1051/0004-6361/202451862