Abstract. Despite recent progress of numerical air quality models, accurate prediction fine particulate matter (PM2.5) is still challenging because uncertainties in physical and chemical parameterizations, meteorological data, emission inventory databases. Recent advances artificial neural networks can be used to overcome limitations models. In this study, a deep network (DNN) model was develop...

Ozone (O3) has become the major factor for exceeding air pollution standards in many Chinese cities, especially more economically developed and densely populated regions, such as eastern China. In this study, we applied Weather Research Forecasting/Community Multiscale Air Quality (WRF/CMAQ) model to predict quality, evaluated influences of different chemical initial conditions on O3 forecasts ...

The Community Multiscale Air Quality (CMAQ) model with the 7th generation aerosol module (AERO7) was employed to simulate organic (OA) in Seoul, Korea, for year 2016. goal of present study includes 1-year simulation OA using WRF-CMAQ recently EPA-developed AERO7 pcVOC (potential VOC from combustion) scale factor revision and analysis seasonal behavior surrogate species Seoul. AERO7, most recent...

The aerosol module of the CMAQ is designed to be an efficient and economical depiction of aerosol dynamics in the atmosphere. The approach taken represents the particle size distribution as the superposition of three lognormal subdistributions, called modes. The processes of coagulation, particle growth by the addition of new mass, particle formation, etc. are included. Time stepping is done wi...

Introduction Conclusions References

The aerosol distribution in Europe was simulated with the Community Multiscale Air Quality (CMAQ) model system for the years 2000 and 2001. The results were compared with daily averages of PM10 measurements taken in the framework of EMEP and with aerosol optical depth (AOD) values measured within Aeronet. The modelled total 5 aerosol mass is typically about 30–60% lower than the corresponding m...

This study evaluates the ability of the Community Multiscale Air Quality (CMAQ) model to simulate the spatial variability of summertime ozone (O3) at the surface and in the free troposphere over the continental United States. Simulated surface O3 concentrations are compared with 987 Air Quality System (AQS) sites and 123 Clean Air Status and Trends Network (CASTNet) sites. CMAQ’s ability to rep...

We investigate the representation of emissions from the largest (Class 3) commercial marine vessels (c3 Marine) within the Community Multiscale Air Quality (CMAQ) model. In present emissions inventories developed by the United States Environmental Protection Agency (EPA), c3 Marine emissions are divided into off-shore and nearshore files. Off-shore c3 Marine emissions are vertically distributed...

The urban landscape is inherently complex and this complexity is not adequately captured in air quality models, such as the Community Multiscale Air Quality (CMAQ) model that is used to assess whether urban areas are in attainment of EPA air quality standards, primarily for ground level ozone. This inadequacy of the CMAQ model, exacerbated by coarse low resolution land cover data inputs, inhibi...