Observations of N2O5 and NO3 at a suburban environment in Yangtze river delta in China: Estimating heterogeneous N2O5 uptake coefficients
Observations of N2O5 and NO3 at a suburban environment in Yangtze river delta in China: Estimating heterogeneous N2O5 uptake coefficients
复制标题
中国长江三角洲郊区环境中 N2O5 和 NO3 的观测：估算异质 N2O5 吸收系数
DOI：
10.1016/j.jes.2020.04.041
复制
发表时间：
2020
影响因子：
6.9
通讯作者：
Liu Wenqing
中科院分区：
文献类型：
--
作者：
Li Zhiyan;Xie Pinhua;Hu Renzhi;Wang Dan;Jin Huawei;Chen Hao;Lin Chuan;Liu Wenqing
硝酸根（NO3）和五氧化二氮（N2 O 5）在夜间大气化学中起着重要作用。2018年5月23日至6月15日，利用光腔衰荡光谱技术（CRDS）在中国南部污染严重的泰州市进行了NO3自由基和N2 O 5的半农村地面观测。NO3和N2 O 5的浓度相对较低，1 min平均值分别为4.4 ± 2.2和26.0 ± 35.7pptV。根据稳态寿命法确定了N_2O_5吸收系数为0.027 ~ 0.107。快速N2 O 5水解是NO3损失的最大贡献者，并导致大量硝酸盐形成，平均值为14.83 ± 6.01 µg/m3。进一步分析表明，N_2O_5的不均匀反应是夜间NOx损失的主要原因，该地区夜间NOx损失率为0.14 ± 0.02。
The nitrate radical (NO3) and dinitrogen pentoxide (N2O5) play an important role in the nocturnal atmosphere chemistry. Observations of NO3radicals and N2O5were performed in a semirural ground site at Tai'Zhou in polluted southern China using cavity ring down spectroscopy (CRDS) from 23 May to 15 June 2018. The observed NO3and N2O5concentrations were relatively low, with 1 min average value of 4.4 ± 2.2 and 26.0 ± 35.7 pptV, respectively. The N2O5uptake coefficient was determined to be from 0.027 to 0.107 based on steady state lifetime method. Fast N2O5hydrolysis was the largest contributor to the loss of NO3and contributed to substantial nitrate formation, with an average value of 14.83 ± 6.01 µg/m3. Further analysis shows that the N2O5heterogeneous reactions dominated the nocturnal NOxloss and the nocturnal NOxloss rate is 0.14 ± 0.02 over this region.