气候变化领域集成服务门户(CCPortal): Surface Wetness as an Unexpected Control on Forest Exchange of Volatile Organic Acids

CCPortal

DOI	10.1029/2020GL088745
	Surface Wetness as an Unexpected Control on Forest Exchange of Volatile Organic Acids
	Fulgham S.R.; Millet D.B.; Alwe H.D.; Goldstein A.H.; Schobesberger S.; Farmer D.K.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:15
英文摘要	We report bidirectional exchange of volatile acids, including isocyanic and alkanoic acids, over a pine forest across multiple seasons. The exchange velocity of these acids is well correlated with dew point depression, suggesting an equilibrium-driven continuum of flux. Wetness on forest surfaces impacts the vertical exchange of gases, and we suggest that water films and droplets drive equilibrium partitioning, with acids being solvated in surface wetness and released through evaporation. Despite their volatility, these acids partition into neutral-to-alkaline aqueous films, consistent with reported dew pH. This relationship between exchange velocity and dew point depression holds for a wetter mixed forest, but not a very dry orchard. Dew point depression is an excellent indicator of acid fluxes so long as the canopy is occasionally wetted. ©2020. The Authors.
英文关键词	Alkalinity; Separators; Aqueous films; Dew point depression; Equilibrium partitioning; Exchange velocity; Mixed forests; Surface wetness; Volatile acids; Volatile organic acid; Forestry; coniferous forest; dew point; evaporation; gas exchange; volatile organic compound; wettability
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170058
作者单位	Department of Chemistry, Colorado State University, Fort Collins, CO, United States; Department of Soil, Water, and Climate, University of Minnesota, Minneapolis-Saint Paul, MN, United States; Department of Environmental Science, Policy, and Management, University of California Berkeley, Berkeley, CA, United States; Department of Applied Physics, University of Eastern Finland, Kuopio, Finland
推荐引用方式 GB/T 7714	Fulgham S.R.,Millet D.B.,Alwe H.D.,et al. Surface Wetness as an Unexpected Control on Forest Exchange of Volatile Organic Acids[J],2020,47(15).
APA	Fulgham S.R.,Millet D.B.,Alwe H.D.,Goldstein A.H.,Schobesberger S.,&Farmer D.K..(2020).Surface Wetness as an Unexpected Control on Forest Exchange of Volatile Organic Acids.Geophysical Research Letters,47(15).
MLA	Fulgham S.R.,et al."Surface Wetness as an Unexpected Control on Forest Exchange of Volatile Organic Acids".Geophysical Research Letters 47.15(2020).