This paper aims to test the ability of WRF-Chem model simulate sand storms in Northwest China and improve simulation results by introducing remote sensing soil moisture data into WRF-Chem. We conducted sensitivity tests, including parameterization scheme tests using By comparing various combinations schemes, which have considerable impacts on emissions, most suitable for was selected establishi...

The first emission inventory from the Distrito Metropolitano de Quito (DMQ) (Ecuador) and WRF-Chem were used to obtain O3 concentrations during the period 11th – 28th Sep/2006. A preliminary comparison with records of the automatic air quality monitoring network shows that during daytime hours, O3 concentrations are well captured by the model. During nighttime the model provides higher concentr...

Abstract Injections of wildfire smoke plumes into the free troposphere impact air quality, yet model forecasts injections are poor. Here, we use aircraft observations obtained during 2019 western US wildfires (FIREX-AQ) to evaluate a commonly used plume rise parameterization in two atmospheric chemistry-transport models (WRF-Chem and HRRR-Smoke). Observations show that occur 35% plumes, whereas...

[1] On 8–11 July 2007 the eastern United States experienced a severe heat wave and smog event with maximum temperatures approaching 38°C and maximum 8 h average ozone mixing ratios of 125 ppbv. We examine this episode with observations and numerical simulations using the Weather Research and Forecasting model with online chemistry (WRF/Chem with RADM2). The general features of this severe smog ...

Lockdowns imposed across the world to combat spread of COVID-19 pandemic also reduced anthropogenic emissions. This study investigates changes in and natural pollution levels during lockdown over Arabian Peninsula (AP), a region where pollutants (mineral dust) dominate. In-situ satellite observations, reanalysis products, Weather Research Forecasting model (WRF) coupled with Chemistry module (W...

The Weather Research and Forecasting (WRF) model with online coupled chemistry (WRF-Chem) is applied to study an intense Saharan dust outbreak event affecting the Italian peninsula in 15 16 April 2018. According MODIS retrievals, this intrusion was characterized by aerosol optical depth (AOD) peak value southern Mediterranean. Measurements within Dry Deposition Network Across Mediterranean (XMe...

The direct (scattering and absorption of radiation) and indirect (cloud-aerosol interactions) effects of aerosols predicted by climate models still contain large uncertainties. To address this issue, the goal of a new project which began this year is to develop an Aerosol Modeling Testbed (AMT) that streamlines the process of testing and evaluating refined aerosol process modules over a wide ra...

WRF-Chem simulations were performed for the March 2005 East Asian Studies of Tropospheric Aerosols: an International Regional Experiment (EAST-AIRE) Intensive Observation Campaign (IOC) to investigate the direct effects of aerosols on surface radiation and air quality. Domain-wide, WRF-Chem showed a decrease of 20W/m in surface shortwave (SW) radiation due to the aerosol direct effect (ADE), co...

The online model, Weather Research and Forecasting Model with Chemistry (WRF-Chem) is employed to interpret the effects of aerosol-cloud-precipitation interaction on mesoscale meteorological fields over Northeast Asia during the Megacity Air Pollution Study-Seoul (MAPS-Seoul) 2015 campaign. The MAPS-Seoul campaign is a pre-campaign of the Korea-United States Air Quality (KORUS-AQ) campaign cond...

Comprehensive model evaluation and comparison of two 3-D air quality modeling systems (i.e., the Weather Research and Forecast model (WRF)/Polyphemus and WRF with chemistry and the Model of Aerosol Dynamics, Reaction, Ionization, and Dissolution (MADRID) (WRF/ChemMADRID)) are conducted over Western Europe. Part 1 describes the background information for the model comparison and simulation desig...