Input Data Requirements for Lagrangian Trajectory Models Academic Article uri icon

abstract

  • A review of Lagrangian methods was presented along with proposals for improving the accuracy of atmospheric Lagrangian models through better access to meteorological analysis and forecast products. The review specifically focused on kinematic Lagrangian models, which computed the trajectories of air particles given the Eulerian velocity field. The kinematic equation of motion comprised of a set of coupled, first-order, ordinary differential equations for each component of motion. Lagrangian dispersion models augmented pure trajectory models by including parameterizations of the effects of unresolved scales of motion on the path of a particle. Dispersion model applications ranged from the microscale, such as the emission from an automobile tailpipe to the global scale, such as the transport of a cloud of volcanic ash. Dispersion models required additional information, such as wind shear, stability, and turbulence parameters to estimate the properties of the unresolved flow.

author list (cited authors)

  • Bowman, K. P., Lin, J. C., Stohl, A., Draxler, R., Konopka, P., Andrews, A., & Brunner, D.

citation count

  • 36

publication date

  • July 2013