气候变化领域集成服务门户(CCPortal): Measurement report: Observations of long-lived volatile organic compounds from the 2019-2020 Australian wildfires during the COALA campaign

CCPortal

DOI	10.5194/acp-22-11033-2022
	Measurement report: Observations of long-lived volatile organic compounds from the 2019-2020 Australian wildfires during the COALA campaign
	Mouat, Asher P.; Paton-Walsh, Clare; Simmons, Jack B.; Ramirez-Gamboa, Jhonathan; Griffith, David W. T.; Kaiser, Jennifer
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	11033
结束页码	11047
卷号	22 期号:17 页码:15
英文摘要	In 2019-2020, Australia experienced its largest wildfire season on record. Smoke covered hundreds of square kilometers across the southeastern coast and reached the site of the COALA-2020 (Characterizing Organics and Aerosol Loading over Australia) field campaign in New South Wales. Using a subset of nighttime observations made by a proton-transfer-reaction time-of-flight mass spectrometer (PTR-ToF-MS), we calculate emission ratios (ERs) and factors (EFs) for 15 volatile organic compounds (VOCs). We restrict our analysis to VOCs with sufficiently long lifetimes to be minimally impacted by oxidation over the similar to 8 h between when the smoke was emitted and when it arrived at the field site. We use oxidized VOC to VOC ratios to assess the total amount of radical oxidation: maleic anhydride / furan to assess OH oxidation, and (cis-2butenediol + furanone) / furan to assess NO3 oxidation. We examine time series of O-3 and NO2 given their closely linked chemistry with wildfire plumes and observe their trends during the smoke event. Then we compare ERs calculated from the freshest portion of the plume to ERs calculated using the entire nighttime period. Finding good agreement between the two, we are able to extend our analysis to VOCs measured in more chemically aged portions of the plume. Our analysis provides ERs and EFs for six compounds not previously reported for temperate forests in Australia: acrolein (a compound with significant health impacts), methyl propanoate, methyl methacrylate, maleic anhydride, benzaldehyde, and creosol. We compare our results with two studies in similar Australian biomes, and two studies focused on US temperate forests. We find over half of our EFs are within a factor of 2.5 relative to those presented in Australian biome studies, with nearly all within a factor of 5, indicating reasonable agreement. For US-focused studies, we find similar results with over half our EFs within a factor of 2.5, and nearly all within a factor of 5, again indicating reasonably good agreement. This suggests that comprehensive field measurements of biomass burning VOC emissions in other regions may be applicable to Australian temperate forests. Finally, we quantify the magnitude attributable to the primary compounds contributing to OH reactivity from this plume, finding results comparable to several US-based wildfire and laboratory studies.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000847670500001
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/273295
作者单位	University System of Georgia; Georgia Institute of Technology; University System of Georgia; Georgia Institute of Technology; University of Wollongong
推荐引用方式 GB/T 7714	Mouat, Asher P.,Paton-Walsh, Clare,Simmons, Jack B.,et al. Measurement report: Observations of long-lived volatile organic compounds from the 2019-2020 Australian wildfires during the COALA campaign[J],2022,22(17):15.
APA	Mouat, Asher P.,Paton-Walsh, Clare,Simmons, Jack B.,Ramirez-Gamboa, Jhonathan,Griffith, David W. T.,&Kaiser, Jennifer.(2022).Measurement report: Observations of long-lived volatile organic compounds from the 2019-2020 Australian wildfires during the COALA campaign.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(17),15.
MLA	Mouat, Asher P.,et al."Measurement report: Observations of long-lived volatile organic compounds from the 2019-2020 Australian wildfires during the COALA campaign".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.17(2022):15.