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Impacts of aerosol direct effects on tropospheric ozone through changes in atmospheric dynamics and photolysis rates

Xing, Jia ; Wang, Jiandong ; Mathur, Rohit ; Wang, Shuxiao ; Sarwar, Golam ; Pleim, Jonathan ; Hogrefe, Christian ; Zhang, Yuqiang ; Jiang, Jingkun ; Wong, David C ; Hao, Jiming

Atmospheric chemistry and physics, 2017-08, Vol.17 (16), p.9869-9883 [Periódico revisado por pares]

Germany: Copernicus GmbH

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Título:
Impacts of aerosol direct effects on tropospheric ozone through changes in atmospheric dynamics and photolysis rates
Autor: Xing, Jia ; Wang, Jiandong ; Mathur, Rohit ; Wang, Shuxiao ; Sarwar, Golam ; Pleim, Jonathan ; Hogrefe, Christian ; Zhang, Yuqiang ; Jiang, Jingkun ; Wong, David C ; Hao, Jiming
Assuntos: Aerosol effects ; Aerosols ; Atmospheric chemistry ; Atmospheric circulation ; Atmospheric dynamics ; Attenuation ; Computer simulation ; Cooling ; Daytime ; Dry deposition ; Dynamics ; Emission analysis ; Emissions control ; Environmental aspects ; Meteorology ; Noon ; Observations ; Optical properties ; Organic compounds ; Ozone ; Ozone layer ; Particulate emissions ; Particulate matter ; Photochemistry ; Photolysis ; Properties ; Radiation absorption ; Scattering ; Simulation ; Solar radiation ; Studies ; Suspended particulate matter ; Troposphere ; Tropospheric ozone ; Ventilation ; VOCs ; Volatile organic compounds
É parte de: Atmospheric chemistry and physics, 2017-08, Vol.17 (16), p.9869-9883
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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Descrição: Aerosol direct effects (ADEs), i.e., scattering and absorption of incoming solar radiation, reduce radiation reaching the ground and the resultant photolysis attenuation can decrease ozone (O ) formation in polluted areas. One the other hand, evidence also suggests that ADE-associated cooling suppresses atmospheric ventilation, thereby enhancing surface-level O . Assessment of ADE impacts is thus important for understanding emission reduction strategies that seek co-benefits associated with reductions in both particuate matter and O levels. This study quantifies the impacts of ADEs on tropospheric ozone by using a two-way online coupled meteorology and atmospheric chemistry model, WRF- CMAQ, using a process analysis methodology. Two mani-festations of ADE impacts on O3 including changes in atmospheric dynamics (ᐃDynamics) and changes in photolysis rates (∆Photolysis) were assessed separately through multiple scenario simulations for January and July of 2013 over China. Results suggest that ADEs reduced surface daily maxima 1 h O (DM1O ) in China by up to 39μgm through the combination of ∆Dynamics and ∆Photolysis in January but enhanced surface DM1O by up to 4μgm in July. Increased O in July is largely attributed to ∆Dynamics, which causes a weaker O sink of dry deposition and a stronger O source of photochemistry due to the stabilization of the at-mosphere. Meanwhile, surface OH is also enhanced at noon in July, though its daytime average values are reduced in January. An increased OH chain length and a shift towards more volatile organic compound (VOC)-limited conditions are found due to ADEs in both January and July. This study suggests that reducing ADEs may have the potential risk of increasing O in winter, but it will benefit the reduction in maxima O in summer.
Editor: Germany: Copernicus GmbH
Idioma: Inglês

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Impacts of aerosol direct effects on tropospheric ozone through changes in atmospheric dynamics and photolysis rates

Xing, Jia ; Wang, Jiandong ; Mathur, Rohit ; Wang, Shuxiao ; Sarwar, Golam ; Pleim, Jonathan ; Hogrefe, Christian ; Zhang, Yuqiang ; Jiang, Jingkun ; Wong, David C ; Hao, Jiming

Germany: Copernicus GmbH

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