Assimilating concentration observations for transport and dispersion modeling in a meandering wind field

Sue Ellen Haupt, Anke Beyer-Lout, Kerrie J. Long, George Spencer Young

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Assimilating concentration data into an atmospheric transport and dispersion model can provide information to improve downwind concentration forecasts. The forecast model is typically a one-way coupled set of equations: the meteorological equations impact the concentration, but the concentration does not generally affect the meteorological field. Thus, indirect methods of using concentration data to influence the meteorological variables are required. The problem studied here involves a simple wind field forcing Gaussian dispersion. Two methods of assimilating concentration data to infer the wind direction are demonstrated. The first method is Lagrangian in nature and treats the puff as an entity using feature extraction coupled with nudging. The second method is an Eulerian field approach akin to traditional variational approaches, but minimizes the error by using a genetic algorithm (GA) to directly optimize the match between observations and predictions. Both methods show success at inferring the wind field. The GA-variational method, however, is more accurate but requires more computational time. Dynamic assimilation of a continuous release modeled by a Gaussian plume is also demonstrated using the genetic algorithm approach.

Original languageEnglish (US)
Pages (from-to)1329-1338
Number of pages10
JournalAtmospheric Environment
Volume43
Issue number6
DOIs
StatePublished - Feb 1 2009

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wind field
genetic algorithm
modeling
atmospheric transport
wind direction
method
plume
prediction

All Science Journal Classification (ASJC) codes

  • Environmental Science(all)
  • Atmospheric Science

Cite this

Haupt, Sue Ellen ; Beyer-Lout, Anke ; Long, Kerrie J. ; Young, George Spencer. / Assimilating concentration observations for transport and dispersion modeling in a meandering wind field. In: Atmospheric Environment. 2009 ; Vol. 43, No. 6. pp. 1329-1338.
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Assimilating concentration observations for transport and dispersion modeling in a meandering wind field. / Haupt, Sue Ellen; Beyer-Lout, Anke; Long, Kerrie J.; Young, George Spencer.

In: Atmospheric Environment, Vol. 43, No. 6, 01.02.2009, p. 1329-1338.

Research output: Contribution to journalArticle

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