TY - JOUR
T1 - Corrections to the mathematical formulation of a backwards lagrangian particle dispersion model
AU - Gibson, Max
AU - Sailor, David J.
N1 - Publisher Copyright:
© Springer Science+Business Media B.V. 2012.
PY - 2012/7/3
Y1 - 2012/7/3
N2 - This technical note introduces some corrections to the Lagrangian particle dispersion model of Rotachetal. (Q J R Meteorol Soc 122:367-389,1996). Careful mathematical derivation following the detailed explanations in that paper uncovered some unit inconsistencies that were the result of mistaken function definitions. Errors are noted in the drift correction, or "probability current" of the particle dispersion model as well as in parameterization of turbulence terms, which are necessary inputs to the model. The probability current comprises Gaussian, convective, and solenoidal components, with derivation errors discovered in the latter two components. All errors are presented along with new formulations that are mathematically consistent, correct the original problems, and adhere to the underlying Gaussian nature of the particle dispersion phenomenon. The corrections shown here should provide more accurate results for particle dispersion models based upon the work of Rotach et al., as well as resolve points of confusion for future researchers referring to that work.
AB - This technical note introduces some corrections to the Lagrangian particle dispersion model of Rotachetal. (Q J R Meteorol Soc 122:367-389,1996). Careful mathematical derivation following the detailed explanations in that paper uncovered some unit inconsistencies that were the result of mistaken function definitions. Errors are noted in the drift correction, or "probability current" of the particle dispersion model as well as in parameterization of turbulence terms, which are necessary inputs to the model. The probability current comprises Gaussian, convective, and solenoidal components, with derivation errors discovered in the latter two components. All errors are presented along with new formulations that are mathematically consistent, correct the original problems, and adhere to the underlying Gaussian nature of the particle dispersion phenomenon. The corrections shown here should provide more accurate results for particle dispersion models based upon the work of Rotach et al., as well as resolve points of confusion for future researchers referring to that work.
KW - Atmospheric turbulence
KW - Dispersion mode
KW - Lagrangian models
KW - Numerical simulation
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U2 - 10.1007/s10546-012-9739-0
DO - 10.1007/s10546-012-9739-0
M3 - Article
AN - SCOPUS:84946478868
SN - 0006-8314
VL - 145
SP - 399
EP - 406
JO - Boundary-Layer Meteorology
JF - Boundary-Layer Meteorology
IS - 2
ER -