Clemens contributed a performance-focused update to the slcs-jsc/mptrac repository by porting core atmospheric particle handling routines to GPUs using OpenACC and C. He reengineered the particle assignment and particle-to-atmosphere computation workflows to leverage parallel computing, optimizing data transfer and memory management for efficient GPU execution. Clemens ensured that the new GPU-accelerated features integrated seamlessly with existing CPU workflows, maintaining repository standards and compatibility. His work laid the foundation for scalable GPU kernels, improving simulation throughput and setting the stage for future enhancements. The depth of the engineering effort reflects a strong grasp of GPU computing and parallel programming principles.