气候变化领域集成服务门户(CCPortal): Photochemical environment over Southeast Asia primed for hazardous ozone levels with influx of nitrogen oxides from seasonal biomass burning

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DOI	10.5194/acp-21-1917-2021
	Photochemical environment over Southeast Asia primed for hazardous ozone levels with influx of nitrogen oxides from seasonal biomass burning
	Marvin M.R.; Palmer P.I.; Latter B.G.; Siddans R.; Kerridge B.J.; Talib Latif M.; Firoz Khan M.
发表日期	2021
ISSN	1680-7316
起始页码	1917
结束页码	1935
卷号	21 期号:3
英文摘要	Mainland and maritime Southeast Asia is home to more than 655 million people, representing nearly 10% of the global population. The dry season in this region is typically associated with intense biomass burning activity, which leads to a significant increase in surface air pollutants that are harmful to human health, including ozone (O3). Latitudebased differences in the dry season and land use distinguish two regional biomass burning regimes: (1) burning on the peninsular mainland peaking in March and (2) burning across Indonesia peaking in September. The type and amount of material burned in each regime impact the emissions of nitrogen oxides (NOx DNOCNO2) and volatile organic compounds (VOCs), which combine to produce ozone. Here, we use the nested GEOS-Chem atmospheric chemistry transport model (horizontal resolution of 0.25 0.3125), in combination with satellite observations from the Ozone Monitoring Instrument (OMI) and ground-based observations from Malaysia, to investigate ozone photochemistry over Southeast Asia in 2014. Seasonal cycles of tropospheric ozone columns from OMI and GEOS-Chem peak with biomass burning emissions. Compared to OMI, the model has a mean annual bias of-11% but tends to overestimate tropospheric ozone near areas of seasonal fire activity. We find that outside these burning areas, the underlying photochemical environment is generally NOx-limited and dominated by anthropogenic NOx and biogenic non-methane VOC emissions. Pyrogenic emissions of NOx play a key role in photochemistry, shifting towards more VOC-limited ozone production and contributing about 30% of the regional ozone formation potential during both biomass burning seasons. Using the GEOS-Chem model, we find that biomass burning activity coincides with widespread ozone exposure at levels that exceed world public health guidelines, resulting in about 260 premature deaths across Southeast Asia in March 2014 and another 160 deaths in September. Despite a positive model bias, hazardous ozone levels are confirmed by surface observations during both burning seasons. © 2021 American Society of Mechanical Engineers (ASME). All rights reserved.
语种	英语
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/168770
作者单位	National Centre for Earth Observation, University of Edinburgh, Edinburgh, United Kingdom; School of GeoSciences, University of Edinburgh, Edinburgh, United Kingdom; Remote Sensing Group, Stfc Rutherford Appleton Laboratory, Chilton, United Kingdom; National Centre for Earth Observation, Stfc Rutherford Appleton Laboratory, Chilton, United Kingdom; Department of Earth Sciences and Environment, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Bangi, Malaysia; Department of Chemistry, Faculty of Science, Universiti Malaya, Kuala Lumpur, Malaysia
推荐引用方式 GB/T 7714	Marvin M.R.,Palmer P.I.,Latter B.G.,et al. Photochemical environment over Southeast Asia primed for hazardous ozone levels with influx of nitrogen oxides from seasonal biomass burning[J],2021,21(3).
APA	Marvin M.R..,Palmer P.I..,Latter B.G..,Siddans R..,Kerridge B.J..,...&Firoz Khan M..(2021).Photochemical environment over Southeast Asia primed for hazardous ozone levels with influx of nitrogen oxides from seasonal biomass burning.Atmospheric Chemistry and Physics,21(3).
MLA	Marvin M.R.,et al."Photochemical environment over Southeast Asia primed for hazardous ozone levels with influx of nitrogen oxides from seasonal biomass burning".Atmospheric Chemistry and Physics 21.3(2021).