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DOI	10.1016/j.atmosenv.2020.117748
	Nitrate isotopic composition of sequential Hurricane Harvey wet deposition: Low latitude NOx sources and oxidation chemistry
	David Felix J.; Murgulet D.
发表日期	2020
ISSN	13522310
卷号	238
英文摘要	Chemical characterization of hurricane wet deposition is integral to understanding how future extreme weather events will impact coastal biogeochemical cycles. Sequential Hurricane Harvey wet deposition samples (n = 7 over 20.5 h) were collected in southeastern Texas, U.S. and the isotopic composition of nitrate and water (δ15N–NO3-, δ18O–NO3- and δ18O–H2O, δ2H–H2O) and the concentrations of ammonium, anions, and dissolved organic carbon were measured. Areas of peak deposition (~1500 mm) received up to 75% of the region's typical average annual inorganic nitrogen wet deposition. After δ15N–NO3- values were corrected for potential fractionation effects, contributions of lightning, natural gas combustion, vehicle exhaust and biogenic sources to NO3− in wet deposition (43.7 ± 31.2%, 7.8 ± 6.1%, 42.6 ± 27.5% and 5.9 ± 5.3%, respectively) were determined using a Bayesian isotope mixing model. Results highlight the significance of natural-sourced nitrogen being deposited to terrestrial systems during hurricane events. The relatively low δ18O–NO3- (36.1 ± 3.0‰) emphasized the role played by hydroxyl and peroxy radicals in HNO3 formation during the tropical summer. An established global NOx oxidation model in combination with δ18O–NO3- approximates the significance of RO2 vs O3 oxidation of NO during the daytime (36.0% vs 64.0%, respectively) and results provide valuable insight to low-latitude atmospheric chemistry. © 2020 Elsevier Ltd
英文关键词	Ammonium; Hurricane; Inorganic nitrogen; Isotope; Nitrate; Wet deposition
语种	英语
scopus关键词	Atmospheric chemistry; Biogeochemistry; Hurricanes; Isotopes; Natural gas vehicles; Nitrates; Nitrogen; Nitrogen oxides; Organic carbon; Oxidation; Biogeochemical cycle; Chemical characterization; Dissolved organic carbon; Extreme weather events; Fractionation effects; Isotopic composition; Natural gas combustion; Terrestrial systems; Deposition; ammonia; anion; hydroxyl group; natural gas; nitrate; nitric oxide; nitrogen 15; organic carbon; oxygen 18; peroxy radical; water; atmospheric chemistry; biogenic emission; concentration (composition); exhaust emission; extreme event; hurricane; isotopic composition; nitrate; nitric oxide; oxidation; pollutant source; wet deposition; Article; Bayes theorem; combustion; concentration (parameter); exhaust gas; fractionation; hurricane; latitude; lightning; oxidation; priority journal; summer; Texas; wet deposition; Texas; United States
来源期刊	Atmospheric Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/145018
作者单位	Physical and Environmental Sciences Department, Texas A & M University – Corpus Christi, 6300 Ocean Drive, Corpus Christi, TX 78412, United States; Center for Water Supply Studies, Texas A & M University, 6300, Ocean Dr, Corpus Christi, United States
推荐引用方式 GB/T 7714	David Felix J.,Murgulet D.. Nitrate isotopic composition of sequential Hurricane Harvey wet deposition: Low latitude NOx sources and oxidation chemistry[J],2020,238.
APA	David Felix J.,&Murgulet D..(2020).Nitrate isotopic composition of sequential Hurricane Harvey wet deposition: Low latitude NOx sources and oxidation chemistry.Atmospheric Environment,238.
MLA	David Felix J.,et al."Nitrate isotopic composition of sequential Hurricane Harvey wet deposition: Low latitude NOx sources and oxidation chemistry".Atmospheric Environment 238(2020).