Fine scale dispersion modelling by coupling ADMS with CMAQ

Abstract

Air quality prediction based on regional models is now providing forecasts to the public such that those who are vulnerable to air pollution can be alerted and advised to avoid outdoor activities in the heavily polluted days. However, with the current spatial resolution of regional models, the pollution level in individual street is not resolved and exposure management for the vulnerable may not be effective. In this research, simulations by coupling results from CMAQ and ADMS is done to provide a fine spatial resolution pollution level prediction for Hong Kong so that pollutant concentration in each street can be shown in a forecast map. The forecast by coupling two models can provide better forecast skill, especially near road sources and the computational efficiency is also improved to provide greater lead time. The CMAQ-ADMS air quality forecast is now set up for daily operational air quality forecast in the HKUST’s forecasting system. It is expected that the forecast will be made available to the public later this year. It is also expected that the higher spatial resolution air quality forecast map can bring new possibilities and ideas on exposure management.

Date of Award	2018
Original language	English
Awarding Institution	The Hong Kong University of Science and Technology