ENHANCEMENT, APPLICATION, AND EVALUATION OF THE REMSAD MODELING SYSTEM FOR THE STUDY OF PARTICULATE MATTER AND MERCURY

摘要

This paper describes some recent work involving the enhancement, application, and evaluation of the REgional Modeling System for Aerosols and Deposition (REMSAD). The REMSAD modeling system was originally intended as a screening tool - a model that could be run (quickly) for a continental-scale modeling domain (specifically the continental U.S) and for a full-year simulation period - to provide information (although not very detailed) on the distribution and composition of particulate matter, the deposition of pollutant (including toxic) species onto the surfaces of inland and coastal bodies of water, and the expected change in air quality and deposition that results from changes in emissions. All of these parameters were intended to be primarily represented in terms of seasonal or annual averages or deposition totals. What began as a simple screening tool has evolved into a more complex modeling system that attempts to simulate the chemistry, transport, and deposition of airborne pollutants (withemphasis on particulate matter (PM), ozone, and mercury) using algorithms that reflect the state-of-the science and current knowledge of the important physical and chemical processes. The REMSAD modeling system was developed and is maintained and distributed by Systems Applications International, Inc. (SAI), a wholly owned subsidiary of ICF Consulting. The U.S. Environmental Protection Agency (EPA) funded major portions of the development of REMSAD.