Calculating Sensitivities, Response and Uncertainties Within LODI for Precipitation Scavenging

TL;DRAbstract

This paper describes an investigation into the uses of first-order, local sensitivity analysis in a Lagrangian dispersion code. The goal of the project is to gain knowledge not only about the sensitivity of the dispersion code predictions to the specific input parameters of interest, but also to better understand the uses and limitations of sensitivity analysis within such a context. The dispersion code of interest here is LODI, which is used for modeling emergency release scenarios at the Department of Energy's National Atmospheric Release Advisory Center (NARAC) at Lawrence Livermore National Laboratory. The NARAC system provides both real-time operational predictions and detailed assessments for atmospheric releases of hazardous materials. LODI is driven by a meteorological data assimilation model and an in-house version of COAMPS, the Naval Research Laboratory's mesoscale weather forecast model.

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