A Comprehensive Model Test of the HONO Sources Constrained to Field Measurements at Rural North China Plain

Environmental Science & Technology
Yuhan LiuYuanhang Zhang

Abstract

As nitrous acid (HONO) photolysis is an important source of hydroxyl radical (OH), apportionment of the ambient HONO sources is necessary to better understand atmospheric oxidation. Based on the data HONO-related species and various parameters measured during the one-month campaign at Wangdu (a rural site in North China plain) in summer 2014, a box model was adopted with input of current literature parametrizations for various HONO sources (nitrogen dioxide heterogeneous conversion, photoenhanced conversion, photolysis of adsorbed nitric acid and particulate nitrate, acid displacement, and soil emission) to reveal the relative importance of each source at the rural site. The simulation results reproduced the observed HONO production rates during noontime in general but with large uncertainty from both the production and destruction terms. NO2 photoenhanced conversion and photolysis of particulate nitrate were found to be the two major mechanisms with large potential of HONO formation but the associated uncertainty may reduce their importance to be nearly negligible. Soil nitrite was found to be an important HONO source during fertilization periods, accounted for (80 ± 6)% of simulation HONO during noontime. For some episodes of...Continue Reading

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Citations

Aug 2, 2020·The Science of the Total Environment·Yongchun LiuHaibo Feng
Mar 10, 2021·The Journal of Physical Chemistry. a·Maofa GeMingyuan Liu
Jul 30, 2021·Environmental Science & Technology·Deming XiaDavid T Allen
Jul 29, 2021·Environmental Science & Technology·Jingwei LiuYuanhang Zhang
Sep 15, 2020·Environmental Science & Technology·Wenqian ZhangMaofa Ge
Dec 9, 2020·Environmental Science & Technology·Songdi LiaoJunyu Zheng
Aug 19, 2020·Environmental Science & Technology·Chaoyang XueYujing Mu
Nov 23, 2021·Atmospheric Chemistry and Physics·Shuping ZhangHong He
Dec 14, 2021·The Science of the Total Environment·Rongrong GuWenxing Wang

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