Keywords: variational method, source rate, emergency response systems, data assimilation, puff models, Lagrangian particle model, atmospheric dispersion modelling, air pollution, air quality, variable meteorological conditions, emission rate, wind velocity, wind speed
Development and first tests of a data assimilation algorithm in a Lagrangian puff atmospheric dispersion model
The development of a Data Assimilation algorithm based on variational approach that allows estimation of source emission rate in Lagrangian particle/puff Atmospheric Dispersion Models for non-stationary (wind and source) conditions is presented. The one-dimensional tests including constant and variable in time source emission rate and wind velocity showed that methodology can be extended to take into account variable meteorological conditions. In the 2-dimensional atmospheric dispersion test cases the sensitivity of the developed method on the spatial density of the measurement network was evaluated and an optimal value for the parameter rmod (error of observations proportional to observed concentrations) was estimated.