气候变化领域集成服务门户(CCPortal): Gas-phase pyrolysis products emitted by prescribed fires in pine forests with a shrub understory in the southeastern United States

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DOI	10.5194/acp-19-9681-2019
	Gas-phase pyrolysis products emitted by prescribed fires in pine forests with a shrub understory in the southeastern United States
	Scharko N.K.; Oeck A.M.; Myers T.L.; Tonkyn R.G.; Banach C.A.; Baker S.P.; Lincoln E.N.; Chong J.; Corcoran B.M.; Burke G.M.; Ottmar R.D.; Restaino J.C.; Weise D.R.; Johnson T.J.
发表日期	2019
ISSN	16807316
起始页码	9681
结束页码	9698
卷号	19 期号:15
英文摘要	In this study we identify pyrolysis gases from prescribed burns conducted in pine forests with a shrub understory captured using a manual extraction device. The device selectively sampled emissions ahead of the flame front, minimizing the collection of oxidized gases, with the captured gases analyzed in the laboratory using infrared (IR) absorption spectroscopy. Results show that emission ratios (ERs) relative to CO for ethene and acetylene were significantly greater than in previous fire studies, suggesting that the sample device was able to collect gases predominantly generated prior to ignition. Further evidence that ignition had not begun was corroborated by novel IR detections of several species, in particular naphthalene. With regards to oxygenated species, several aldehydes (acrolein, furaldehyde, acetaldehyde, formaldehyde) and carboxylic acids (formic, acetic) were all observed; results show that ERs for acetaldehyde were noticeably greater, while ERs for formaldehyde and acetic acid were lower compared to other studies. The acetylene-to-furan ratio also suggests that high-temperature pyrolysis was the dominant process generating the collected gases. © 2019 Author(s). This work is distributed under the Creative Commons Attribution 4.0 License.
语种	英语
scopus关键词	acetic acid; acetylene; atmospheric chemistry; atomic absorption spectroscopy; coniferous forest; gas; high temperature; pyrolysis; shrub; United States
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/144243
作者单位	Pacific Northwest National Laboratories, Richland, WA, United States; USDA Forest Service, Rocky Mountain Research Station, Missoula, MT, United States; USDA Forest Service, Pacific Southwest Research Station, Riverside, CA, United States; USDA Forest Service, Pacific Northwest Research Station, Seattle, WA, United States; School of Environmental and Forest Sciences, University of Washington, Seattle, WA, United States
推荐引用方式 GB/T 7714	Scharko N.K.,Oeck A.M.,Myers T.L.,et al. Gas-phase pyrolysis products emitted by prescribed fires in pine forests with a shrub understory in the southeastern United States[J],2019,19(15).
APA	Scharko N.K..,Oeck A.M..,Myers T.L..,Tonkyn R.G..,Banach C.A..,...&Johnson T.J..(2019).Gas-phase pyrolysis products emitted by prescribed fires in pine forests with a shrub understory in the southeastern United States.Atmospheric Chemistry and Physics,19(15).
MLA	Scharko N.K.,et al."Gas-phase pyrolysis products emitted by prescribed fires in pine forests with a shrub understory in the southeastern United States".Atmospheric Chemistry and Physics 19.15(2019).