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DOI10.5194/acp-17-9869-2017
Impacts of aerosol direct effects on tropospheric ozone through changes in atmospheric dynamics and photolysis rates
Xing, Jia1; Wang, Jiandong1; Mathur, Rohit2; Wang, Shuxiao1; Sarwar, Golam2; Pleim, Jonathan2; Hogrefe, Christian2; Zhang, Yuqiang2; Jiang, Jingkun1; Wong, David C.2; Hao, Jiming1
发表日期2017-08-22
ISSN1680-7316
卷号17期号:16页码:9869-9883
英文摘要

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-3) formation in polluted areas. One the other hand, evidence also suggests that ADE-associated cooling suppresses atmospheric ventilation, thereby enhancing surface-level O-3. Assessment of ADE impacts is thus important for understanding emission reduction strategies that seek co-benefits associated with reductions in both particulate matter and O-3 levels. This study quantifies the impacts of ADEs on tropospheric ozone by using a two-way online coupled meteorology and atmospheric chemistry model, WRFCMAQ, using a process analysis methodology. Two manifestations of ADE impacts on O-3 including changes in atmospheric dynamics (Delta Dynamics) and changes in photolysis rates (Delta 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-3 (DM1O(3)) in China by up to 39 mu gm(-)3 through the combination of Delta Dynamics and Delta Photolysis in January but enhanced surface DM1O(3) by up to 4 mu gm(-3) in July. Increased O-3 in July is largely attributed to 1 Dynamics, which causes a weaker O-3 sink of dry deposition and a stronger O-3 source of photochemistry due to the stabilization of the atmosphere. 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-3 in winter, but it will benefit the reduction in maxima O-3 in summer.


语种英语
WOS记录号WOS:000408098800005
来源期刊ATMOSPHERIC CHEMISTRY AND PHYSICS
来源机构美国环保署
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/57667
作者单位1.Tsinghua Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100084, Peoples R China;
2.US EPA, Res Triangle Pk, NC 27711 USA
推荐引用方式
GB/T 7714
Xing, Jia,Wang, Jiandong,Mathur, Rohit,et al. Impacts of aerosol direct effects on tropospheric ozone through changes in atmospheric dynamics and photolysis rates[J]. 美国环保署,2017,17(16):9869-9883.
APA Xing, Jia.,Wang, Jiandong.,Mathur, Rohit.,Wang, Shuxiao.,Sarwar, Golam.,...&Hao, Jiming.(2017).Impacts of aerosol direct effects on tropospheric ozone through changes in atmospheric dynamics and photolysis rates.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(16),9869-9883.
MLA Xing, Jia,et al."Impacts of aerosol direct effects on tropospheric ozone through changes in atmospheric dynamics and photolysis rates".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.16(2017):9869-9883.
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