Development of a net ozone production rate detection system based on dual-channel cavity ring-down spectroscopy  

作　　者：Jinzhao Tong Renzhi Hu Changjin Hu Xiaoyan Liu Haotian Cai Chuan Lin Liujun Zhong JiaweiWang Pinhua Xie 

机构地区：[1]School of Environmental Science and Optoelectronic Technology,University of Science and Technology of China,Hefei 230026,China [2]Anhui Institute of Optics and Fine Mechanics,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,China [3]School of Pharmacy,Anhui Medical University,Hefei 230032,China

出　　处：《Journal of Environmental Sciences》2025年第3期419-430,共12页环境科学学报(英文版)

基　　金：supported by the National Natural Science Foundation of China(Nos.62275250 and 61905003);the Natural Science Foundation of Anhui Province(No.2008085J20);the National Key R&D Program of China(No.2022YFC3700301);Anhui Provincial Key R&D Program(No.2022l07020022).

摘　　要：A novel system for measuring net photochemical ozone production rates in the atmosphere based on cavity ring-down spectroscopy(OPR-CRDS)was developed.The system consists of two chambers(a reaction chamber and a reference chamber)and a dual-channel O_(x)-CRDS detector.To minimize the wall loss of O_(x)in the chambers,the inner surfaces of both chambers are coated with Teflon film.The performance of the OPR-CRDS system was characterized.It was found that even though the photolysis frequency(J value)decreased by 10%,the decrease in the P(O_(3))caused by the ultraviolet-blocking film coating was less than 3%.The two chambers had a good consistency in the mean residence time and the measurement of NO_(2)and O_(x)under the condition of no sunlight.The detection limit of the OPR-CRDS was determined to be 0.20 ppbv/hr.To further verify the accuracy of the system,the direct measurement values of the OPR-CRDS systemwere comparedwith the calculation results based on radical(OH,HO_(2),and RO_(2))reactions,and a good correlation was obtained between the measured and calculated values.Finally,the developed instrument was applied to obtain the comprehensive field observations at an urban site in the Yangtze River Delta(China)for 40 days,the time series and change characteristics of the P(O_(3))were obtained directly,and the good environmental adaptability and stability of the OPR-CRDS system were demonstrated.It is expected that the new instrument will be beneficial to investigations of the relationship between P(O_(3))and its precursors.

关 键 词：OZONE Net photochemical production rate CRDS Atmospheric chemistry 

分 类 号：F42[经济管理—产业经济]