"Atmospheric dispersion model for exposure and risk assessment (ADMER) version 2 - development of a sub-grid module -"  

Haruyuki Higashino, Hiroya Shinozaki, Junko Nakanishi

National Institute of Advanced Industrial Science and Technology

SRA 2006 Annual Meeting (Baltimore 2006/12/4)

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Abstract

AIST's Atmospheric Dispersion Model for Exposure and Risk Assessment (ADMER) estimates regional spatiotemporal distribution of concentrations of chemical substances — for instance, the Kanto and Kinki areas — and issues predictions of the monthly averages at spatial resolutions of 5 x 5 km within six time zones (i.e., 4 hours average). ADMER offers a wide range of basic functions — grid emission preparation, meteorological data processing and analysis, and estimated concentration analysis, including exposed population calculations. ADMER has already held 2000 or more users, and is one of the most popular software for the assessment of exposure to hazardous air pollutants in Japan. However, we are receiving a lot of proposals for the improvement, as users are increasing. One of the most frequent requests from users is finer spatial resolution. We have developed the sub-grid module of ADMER which can estimate a distribution of concentrations at three different kind of spatial resolutions of 100 x 100 m, 500 x 500 m, and 1 x 1 km within the basic ADMER grid (5 x 5 km). Sub-grid calculation is only performed at a selected ADMER grid. Contributions from emissions of other than selected ADMER grids are estimated at resolutions of 5 x 5 km by previous method of ADMER. Concentration at each sub-grid was estimated by overlapping the contributions from all source grids (all sub-grids within the selected grid and all ADMER grids in the analytical domain) onto all the sub-grids within the selected grid. We also carried out the model validation. Benzene was selected as a target substance for testing the effect of sub-grid module. The results given by ADMER with sub-grid module were consistent with measured data, and they were largely improved rather than by only ADMER. The version 2.0 of ADMER which includes a sub-grid module will be available by the end of 2006. It will be available to the general public and will be downloaded and used free of cost.

Keywords

exposure, model, air, population, grid