Four years of experience in at least one area relevant to the research, such as data assimilation, optimization, inverse problems, Bayesian methods, uncertainty quantification, numerical modeling, atmospheric transport or dispersion, source-receptor modeling, spatial statistics, or spatiotemporal modeling. Experience in at least one area relevant to the research, such as data assimilation, optimization, inverse problems, Bayesian methods, uncertainty quantification, numerical modeling, atmospheric transport or dispersion, source-receptor modeling, spatial statistics, or spatiotemporal modeling.