During April 2025, Brian Bye enhanced the robustness of the FAN (Fast Agro-ecosystem Nitrogen) model within the E3SM-Project/E3SM repository, focusing on dynamic crop conditions and transient land use. He addressed numerical stability by implementing skip-logic for cells with very small weights and ensured consistent model behavior by allocating and initializing FAN-related variables regardless of configuration flags. Working primarily in Fortran and leveraging expertise in biogeochemistry and numerical simulation, Brian’s contributions enabled the FAN model to operate reliably with dynamic crops. The work demonstrated careful attention to initialization logic and stability, reflecting a thoughtful approach to climate modeling challenges.