气候变化领域集成服务门户(CCPortal): Permafrost nitrous oxide emissions observed on a landscape scale using the airborne eddy-covariance method

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DOI	10.5194/acp-19-4257-2019
	Permafrost nitrous oxide emissions observed on a landscape scale using the airborne eddy-covariance method
	Wilkerson J.; Dobosy R.; Sayres D.S.; Healy C.; Dumas E.; Baker B.; Anderson J.G.
发表日期	2019
ISSN	16807316
起始页码	4257
结束页码	4268
卷号	19 期号:7
英文摘要	The microbial by-product nitrous oxide (N2O), a potent greenhouse gas and ozone depleting substance, has conventionally been assumed to have minimal emissions in permafrost regions. This assumption has been questioned by recent in situ studies which have demonstrated that some geologic features in permafrost may, in fact, have elevated emissions comparable to those of tropical soils. However, these recent studies, along with every known in situ study focused on permafrost N2O fluxes, have used chambers to examine small areas (<50 m2). In late August 2013, we used the airborne eddy-covariance technique to make in situ N2O flux measurements over the North Slope of Alaska from a low-flying aircraft spanning a much larger area: around 310 km2. We observed large variability of N2O fluxes with many areas exhibiting negligible emissions. Still, the daily mean averaged over our flight campaign was 3.8 (2.2-4.7) mg N2O mĝ'2 dĝ'1 with the 90 % confidence interval shown in parentheses. If these measurements are representative of the whole month, then the permafrost areas we observed emitted a total of around 0.04-0.09 g mĝ'2 for August, which is comparable to what is typically assumed to be the upper limit of yearly emissions for these regions. © Author(s) 2019.
语种	英语
scopus关键词	airborne survey; atmospheric chemistry; eddy covariance; emission; flux measurement; nitrous oxide; permafrost; Alaska; North Slope; 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/144520
作者单位	Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA 02138, United States; Atmospheric Turbulence and Diffusion Division, NOAA/ARL, Oak Ridge, TN 37830, United States; Oak Ridge Assoc. Universities (ORAU), Oak Ridge, TN 37830, United States; Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, United States; Department of Earth and Planetary Sciences, Harvard University, 12 Oxford Street, Cambridge, MA 02138, United States
推荐引用方式 GB/T 7714	Wilkerson J.,Dobosy R.,Sayres D.S.,et al. Permafrost nitrous oxide emissions observed on a landscape scale using the airborne eddy-covariance method[J],2019,19(7).
APA	Wilkerson J..,Dobosy R..,Sayres D.S..,Healy C..,Dumas E..,...&Anderson J.G..(2019).Permafrost nitrous oxide emissions observed on a landscape scale using the airborne eddy-covariance method.Atmospheric Chemistry and Physics,19(7).
MLA	Wilkerson J.,et al."Permafrost nitrous oxide emissions observed on a landscape scale using the airborne eddy-covariance method".Atmospheric Chemistry and Physics 19.7(2019).