MPTRAC: A high-performance Lagrangian transport model for atmospheric air parcel dispersion

The Massive-Parallel Trajectory Calculations (MPTRAC) Lagrangian transport model (Hoffmann et al., 2016, 2022) simulates the movement, dispersion, and chemical transformation of aerosols and trace gases in the atmosphere. Unlike grid-based models, MPTRAC tracks individual air parcels, providing high-resolution insights into transport, mixing, chemistry, and deposition. Trajectory calculations are driven by meteorological fields from data assimilation systems and forecast models. MPTRAC has been applied in various contexts, especially for tracking volcanic plumes in the troposphere and stratosphere. Optimized for high-performancecomputing (HPC) and graphics processing units (GPU), MPTRAC efficiently supports large-scale, high-resolution simulations, making it a powerful tool for atmospheric research.