Observation of the nighttime nitrate radical in Hefei, China.
Observation of nighttime nitrate radical (NO3) was performed by using long path differential optical absorption spectroscopy (LP-DOAS), on the outskirts of Hefei, China. The time series of NO3 and supporting parameters were simultaneously measured for a week (31 May-7 June 2006). The results indicated that the average concentration of NO3 was 15.6 pptv with an average lifetimes of 96 s, whereas, NO3 production rates varied from 8 x 10(5)/(cm3 x s) to 2.98 x 10(7)/(cm3 x s). Furthermore, the calculated N2O5 concentration averaged at 380 pptv. Analysis of data indicated that direct sinks were probably dominating the NO3 loss process during this campaign. The results were compared with other campaigns in the boundary layer.
Li
Suwen
S
Key Laboratory of Environmental Optical and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China. swli@aiofm.ac.cn
Liu
Wenqing
W
Xie
Pinua
P
Li
Ang
A
Qin
Min
M
Peng
Fumin
F
Zhu
Yanwu
Y
D000393:Air Pollutants / Q000032:analysis*; D002681:China; D004784:Environmental Monitoring; D009566:Nitrates / Q000032:analysis*; D009573:Nitrites / Q000032:analysis; D010126:Ozone / Q000032:analysis; D013997:Time Factors
D000393:Air Pollutants; D009566:Nitrates; D009573:Nitrites; D010126:Ozone