Journal article
Aircraft landing and takeoff emission impacts on surface O3 and PM2.5 through aerosol direct feedback effects estimated by the coupled WRF-CMAQ model
Atmospheric environment (1994), Vol.243, p.117859
12/15/2020
Handle:
https://hdl.handle.net/2376/119424
Appears in Aviation Sustainability Center (ASCENT)
Abstract
The aerosol direct feedback effects (ADFEs) are neglected in traditional air quality modeling studies (where meteorology is used as input and not affected by the chemistry and aerosol microphysics) for estimating the impacts of aircraft emissions on air quality. In this study, aircraft landing and take-off (LTO) attributable change of O3 and PM2.5 concentrations through ADFEs for the year 2005 within the contiguous United States (CONUS) are quantified by a coupled meteorology-chemistry modeling system: Weather Research and Forecasting – Community Multi-scale Air Quality (WRF-CMAQ) model. We first quantified the effects of ADFEs of all aerosols within the CONUS (not the effects of aircraft LTO emissions) on surface meteorology and air quality and found that ADFEs changed on average the downward short-wave radiation (SWR), 2-m temperature (T2), planetary boundary layer (PBL) height, O3 and PM2.5 by −7.38 W/m2, −0.47 K, −20.72 m, −0.41 ppb and +0.28 μg/m3 in 2005. We also found a seasonal influence where ADFE-influenced change (decrease) of SWR, T2, PBL, O3 and change (increase) of PM2.5 were higher in summer than in winter. We found that the aircraft LTO emissions’ contribution to domain average surface concentration of O3 and PM2.5 were +0.0065 ppb and +0.0022 μg/m3 respectively when ADFEs are accounted for. The ADFEs decrease aircraft LTO attributable surface O3 and PM2.5 change by 21% and 23% respectively comparing with that without ADFE in 2005. We also found that in both without-and-with ADFE cases, the aircraft LTO emissions increases domain average of O3 from April to October and decreases from November to March showing a strong seasonal pattern. Our modeling study revealed that use of a coupled model with ADFE shows localized changes in air quality by aircraft LTO emissions across the domain which were masked when looking at domain averages for both O3 and PM2.5, and which may be important for accurately quantifying health risk due to air pollution exposures in densely populated areas.
•Coupled WRF-CMAQ model predicts aerosol direct feedback effects (ADFE) on surface meteorology and air quality.•When ADFEs are included, aircraft LTO emissions enhance O3 by +0.0065 ppb and PM2.5 + 0.0022 μg/m3 domain-wide in the U.S.•The ADFEs decrease aircraft’s LTO attributable surface O3 and PM2.5 change by 21% and 23% respectively.•Coupled model with ADFE shows localized changes in air quality by aircraft LTO emissions domain-wide.
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Details
- Title
- Aircraft landing and takeoff emission impacts on surface O3 and PM2.5 through aerosol direct feedback effects estimated by the coupled WRF-CMAQ model
- Creators
- Chowdhury G Moniruzzaman - University of North Carolina at Chapel HillJared Bowden - University of North Carolina at Chapel HillSaravanan Arunachalam - University of North Carolina at Chapel Hill
- Publication Details
- Atmospheric environment (1994), Vol.243, p.117859
- Academic Unit
- Aviation Sustainability Center (ASCENT); Emissions
- Publisher
- Elsevier Ltd
- Grants
- 13‐C‐AJFE‐UNC-02, 04, 06, 07, 10, Federal Aviation Administration (United States, Washington) - FAA
- Identifiers
- 99900620454301842
- Language
- English
- Resource Type
- Journal article