Measurement of HONO flux using the aerodynamic gradient method over an agricultural field in the Huaihe River Basin, China

doi:10.1016/j.jes.2021.09.005

	Measurement of HONO flux using the aerodynamic gradient method over an agricultural field in the Huaihe River Basin, China
	Meng, Fanhao 2,3; Qin, Min 2; Fang, Wu 2; Duan, Jun 2; Tang, Ke 2,3; Zhang, Helu 2,3; Shao, Dou 2,3; Liao, Zhitang 2,3; Feng, Yan 1,5; Huang, Yong 1,5
刊名	JOURNAL OF ENVIRONMENTAL SCIENCES
	2022-04-01
卷号	114
关键词	Aerodynamic gradient method HONO flux Huaihe River Basin Agricultural field
ISSN号	1001-0742
DOI	10.1016/j.jes.2021.09.005
通讯作者	Qin, Min(mqin@aiofm.ac.cn)
英文摘要	To investigate nitrous acid (HONO) levels and potential HONO sources above crop rotation fields. The HONO fluxes were measured by the aerodynamic gradient (AG) method from 14 December 2019 to 2 January 2020 over an agricultural field in the Huaihe River Basin. The ambient HONO levels were measured at two different heights (0.15 and 1.5 m), showing a typical diurnal cycle with low daytime levels and high nighttime levels. The upward HONO fluxes were mostly observed during the day, whereas deposition dominated at night. The diurnal variation of HONO flux followed solar radiation, with a noontime maximum of 0.2 nmol/(m 2 .sec). The average upward HONO flux of 0.06 ?? 0.17 nmol/(m 2 .sec) indicated that the agricultural field was a net source for atmospheric HONO. The higher HONO/NO 2 ratio and NO 2 -to-HONO conversion rate close to the surface suggested that nocturnal HONO was formed and released near the ground. The unknown HONO source was derived from the daytime HONO budget analysis, with an average strength of 0.31 ppbV/hr at noontime. The surface HONO flux, which was highly correlated with the photolysis frequency J (NO 2 ) ( R 2 = 0.925) and the product of J (NO 2 ) x NO 2 ( R 2 = 0.840), accounted for -23% of unknown daytime HONO source. The significant correlation between HONO fluxes and J (NO 2 ) suggests a light-driven HONO formation mechanism responsible for the surface HONO flux during daytime.
资助项目	National Natural Science Foundation of China[41875154] ; National Natural Science Foundation of China[U19A2044] ; National Natural Science Foundation of China[91544104] ; Anhui Provincial Key RD Program[202104i07020010]
WOS关键词	NITROUS-ACID HONO ; BOUNDARY-LAYER ; DAYTIME SOURCE ; ATMOSPHERIC CHEMISTRY ; VERTICAL PROFILES ; MIXING-RATIO ; RURAL SITE ; HUMIC-ACID ; URBAN SITE ; SOIL
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000798822800010
资助机构	National Natural Science Foundation of China ; Anhui Provincial Key RD Program
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/131145]
专题	中国科学院合肥物质科学研究院
通讯作者	Qin, Min
作者单位	1.Anhui Inst Meteorol Sci, Anhui Prov Key Lab Atmospher Sci & Satellite Remo, Hefei 230031, Peoples R China 2.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Hefei Inst Phys Sci, Key Lab Environm Opt & Technol, Hefei 230031, Peoples R China 3.Univ Sci & Technol China, Hefei 230026, Peoples R China 4.Chinese Acad Sci, Ctr Excellence Reg Atmospher Environm, Inst Urban Environm, Xiamen 361021, Peoples R China 5.Shouxian Natl Climatol Observ, Huaihe River Basin Typ Farm Ecometeorol Expt Fiel, Shouxian 232200, Peoples R China
推荐引用方式 GB/T 7714	Meng, Fanhao,Qin, Min,Fang, Wu,et al. Measurement of HONO flux using the aerodynamic gradient method over an agricultural field in the Huaihe River Basin, China[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2022,114.
APA	Meng, Fanhao.,Qin, Min.,Fang, Wu.,Duan, Jun.,Tang, Ke.,...&Liu, Wenqing.(2022).Measurement of HONO flux using the aerodynamic gradient method over an agricultural field in the Huaihe River Basin, China.JOURNAL OF ENVIRONMENTAL SCIENCES,114.
MLA	Meng, Fanhao,et al."Measurement of HONO flux using the aerodynamic gradient method over an agricultural field in the Huaihe River Basin, China".JOURNAL OF ENVIRONMENTAL SCIENCES 114(2022).