Observation and Analysis of Taizhou Atmosphere NH3 Concentration by Off-Axis Integrated Cavity Output Spectroscopy

doi:10.3964/j.issn.1000-0593(2021)02-0360-08

	Observation and Analysis of Taizhou Atmosphere NH3 Concentration by Off-Axis Integrated Cavity Output Spectroscopy
	Zhang Guo-xian 1,2; Hu Ren-zhi 1; Xie Pin-hua 1,2,3,4; Wang Feng-yang 1; Wang Yi-hui 1,2; Tong Jin-zhao 1; Chen Shi-yi 5; Li Shu-le 5; Qiu Wan-yi 5; Liu Wen-qing 1,2,3,4
刊名	SPECTROSCOPY AND SPECTRAL ANALYSIS
	2021-02-01
卷号	41
关键词	NH3 Emission source Backward trajectory Evaporation effect
ISSN号	1000-0593
DOI	10.3964/j.issn.1000-0593(2021)02-0360-08
通讯作者	Hu Ren-zhi(rzhu@aiofm.ac.cn)
英文摘要	Ammonia (NH3) is the most important reduced form of active nitrogen in the atmosphere, and is an important gaseous precursor for the formation of secondary inorganic ammonium salts. Under the extremely polluted conditions in China, these ammonium salts can account for 40%similar to 60% of the mass of PM2.5. NH3 pollution not only affects the intensity of light radiation globally but also exacerbates atmospheric photochemical pollution. At present, the source of ammonia in urban areas is still controversial. In order to study the pollution of NH3 in Taizhou, and then determine the source of NH3. Based on the off-axis integrated cavity output spectroscopy technology, this paper carried out continuous observation of atmospheric NH3 concentration in Taizhou in summer. Other pollutant concentrations ( such as O-3, NOx, CO, NH4+) were measured simultaneously. The observation point is 300 m away from the traffic arterial. The average concentration of NH3 during the observation period is (25. 1 +/- 4. 5) mu g. m(-3), which was higher than that of other cities at home and abroad. There is no significant difference in the mean value of NH3 during the day and at night, but it generally decreases during the day and increases at night. The stable atmospheric boundary layer at night maybe one of the main reasons for the accumulation of pollutants. In the morning, the concentration of NH3 increased sharply, mainly due to the evaporation of NHx (gaseous NH3 and particulate NH4) deposited in water vapor at night. With the enhancement of light, the evaporation of NH3 in environmental water vapor gradually ended, the photochemical reaction process gradually began to be dominated, then NH3 concentration increased slowly, gradually reached equilibrium, and finally declined rapidly. When the humidity at a high level during nighttime, the deposition process of NHx is easier to observe. They are combined with the meteorological parameters during the observation period and the concentration with the concentration of the conventional pollutants. The trend and level of pollutants in the Taizhou area has been discussed. The results show that the impact of traffic emissions on the NH3 concentration in Taizhou is small on most days. Only June 7th, NH3 has a good correlation with NOx, CO, with R-2 of 0. 740 and 0. 911. It is speculated that the day's traffic has a significant influence, and the traffic source is an important local source of NH3. Backward trajectory analysis was performed to compare the changes in pollutant concentrations caused by different air masses during the observation period. According to the analysis of observation results, pollution discharge from the industrial area on the northwest of the observation point may be an important cause of the pollution incident on June 10th at night.
WOS关键词	TECHNICAL NOTE ; AMMONIA ; URBAN ; VARIABILITY ; EMISSION
WOS研究方向	Spectroscopy
语种	英语
出版者	OFFICE SPECTROSCOPY & SPECTRAL ANALYSIS
WOS记录号	WOS:000626516700005
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/121179]
专题	中国科学院合肥物质科学研究院
通讯作者	Hu Ren-zhi
作者单位	1.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Key Lab Environm Opt & Technol, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Branch Grad Sch, Hefei 230026, Peoples R China 3.Chinese Acad Sci, CAS Ctr Excellence Reg Atmospher Environm, Inst Urban Environm, Xiamen 361000, Peoples R China 4.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China 5.Peking Univ, Coll Environm Sci & Engn, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Zhang Guo-xian,Hu Ren-zhi,Xie Pin-hua,et al. Observation and Analysis of Taizhou Atmosphere NH3 Concentration by Off-Axis Integrated Cavity Output Spectroscopy[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS,2021,41.
APA	Zhang Guo-xian.,Hu Ren-zhi.,Xie Pin-hua.,Wang Feng-yang.,Wang Yi-hui.,...&Liu Wen-qing.(2021).Observation and Analysis of Taizhou Atmosphere NH3 Concentration by Off-Axis Integrated Cavity Output Spectroscopy.SPECTROSCOPY AND SPECTRAL ANALYSIS,41.
MLA	Zhang Guo-xian,et al."Observation and Analysis of Taizhou Atmosphere NH3 Concentration by Off-Axis Integrated Cavity Output Spectroscopy".SPECTROSCOPY AND SPECTRAL ANALYSIS 41(2021).