Worked on the E3SM-Project/E3SM repository to enhance the accuracy of climate simulations by updating the Stefan-Boltzmann constant to the latest CODATA value. This feature improved the precision of radiative calculations, resulting in a tighter energy balance and more reliable long-term projections within the E3SM model. The technical approach involved careful handling of physics constants and integration across radiative transfer components, ensuring reproducibility and consistency in scientific computing workflows. Utilized Fortran for codebase modifications and maintained a verifiable commit history with disciplined git practices. No major bugs were reported or fixed during this period, reflecting a focused feature delivery.