Abstract Accurate representation of initial and boundary conditions of chemical species in numerical models is a major challenge for air quality prediction. Model for Ozone and Related chemical Tracers, version 4 (MOZART-4) is an offline global chemical transport model simulating various gases and particulates in the atmosphere. In this work, MOZART-4 analysis is used to modify the chemical boundary conditions over India to improve the forecast in an online-coupled model. A sensitivity study has been performed using the Weather Research and Forecasting (WRF) model coupled with Chemistry model (WRF-Chem) for the highly polluted winter month of December 2016. Daily two parallel experiments are performed from the WRF-Chem model with and without updating chemical initial and lateral boundary conditions using MOZART-4 analyses. Results show that the tropospheric ozone (O3) and surface carbon monoxide (CO) forecasts are improved by 6% and 20%, respectively when MOZART-4 analysis is used to update chemical initial and lateral boundary conditions. Moreover, prediction of O3 and CO is also improved vertically (reduction in root mean square difference by 58% and 26%, respectively) in different forecast lengths. The percentage improvement in surface CO, particulate matter of size less than 2.5 μm (PM2.5) and particulate matter of size less than 10 μm (PM10) forecasts is ∼22%, ∼4.3% and ∼20%, respectively when compared against ground observations from Central Pollution Control Board (CPCB), New Delhi stations. Overall, we observed improvement in O3, CO, PM2.5 and PM10 forecast using WRF-Chem model after initialization of chemical conditions from MOZART-4 analysis.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Impact of chemical initial and lateral boundary conditions on air quality prediction


    Contributors:

    Published in:

    Advances in Space Research ; 64 , 6 ; 1331-1342


    Publication date :

    2019-06-20


    Size :

    12 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Lateral Intent Error's Impact on Aircraft Prediction

    Paglione, Mike | Online Contents | 2010


    Effect of the Initial Conditions on Turbulent Boundary Layers

    David J. Walker / Luciano Castillo | AIAA | 2002


    Effects of initial boundary layer conditions on jet mixing

    Hill, W. / Jenkins, R. / Gilbert, B. | Tema Archive | 1975