ASPEN (Assessment System for Population Exposure Nationwide)

The Assessment System for Population Exposure Nationwide (ASPEN) consists of a dispersion and a mapping module.

Population Exposuredispersionmapping

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Initial contribute: 2019-10-14

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Application-focused categoriesNatural-perspectiveAtmospheric regions

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English {{currentDetailLanguage}} English

Quoted from: https://www.epa.gov/scram/air-quality-dispersion-modeling-alternative-models#aspen 

The Assessment System for Population Exposure Nationwide (ASPEN) consists of a dispersion and a mapping module. The dispersion module is a Gaussian formulation based on ISCST3 for estimating ambient annual average concentrations at a set of fixed receptors within the vicinity of the emission source. The mapping module produces a concentration at each census tract. Input data needed are emissions data, meteorological data and census tract data. The Emissions Modeling System for Hazardous Pollutants (EMS-HAP) is needed to process the emission inputs into the ASPEN model or the ISC3 model. The ASPEN model was used in estimating annual ambient concentrations for air toxics pollutant in the National Air Toxics Assessment (NATA) Study.

The ASPEN model and the EMS-HAP Version 3.0 emission modeling system were used to estimate the ambient concentrations for the National-Scale Air Toxics Assessment for 1999. The 2005 results are available on the NATA website. The 1996 results using EMS-HAP Version 2.0 and the ASPEN model, are still available on the National Air Toxics Assessment (NATA) Archive Website.

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US Environmental Protection Agency (2019). ASPEN (Assessment System for Population Exposure Nationwide), Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/eb391f99-0ac2-4305-b0a3-cb8f5a1c96cf
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