loading page

Global and regional patterns of soil nitrous acid emissions and their acceleration of rural photochemical reactions
  • +20
  • Dianming Wu,
  • Jingwei Zhang,
  • Mengdi Wang,
  • Junling An,
  • Ruhai Wang,
  • Haroon Haider,
  • -- Xu-Ri,
  • Ye Huang,
  • Qiang Zhang,
  • Feng Zhou,
  • Hanqin Tian,
  • Xiuying Zhang,
  • Lingling Deng,
  • Yuepeng Pan,
  • Xi Chen,
  • Yuanchun Yu,
  • Chunsheng Hu,
  • Rui Wang,
  • Yaqi Song,
  • Zhiwei Gao,
  • Yue Wang,
  • Lijun Hou,
  • Min Liu
Dianming Wu
East China Normal University

Corresponding Author:[email protected]

Author Profile
Jingwei Zhang
The Institute of Atmospheric Physics, CAS, LAPC, Beijing, 100029, P.R.China
Author Profile
Mengdi Wang
East China Normal University
Author Profile
Junling An
Institute of Atmospheric Physics,Chinese Academy of Sciences
Author Profile
Ruhai Wang
Institute of soil Sciences, Chinese Academy of Sciences
Author Profile
Haroon Haider
East China Normal University
Author Profile
-- Xu-Ri
Institute of Tibetan Plateau Research, Chinese Academy of Sciences, ,
Author Profile
Ye Huang
East China Normal University
Author Profile
Qiang Zhang
Tsinghua University
Author Profile
Feng Zhou
Peking University
Author Profile
Hanqin Tian
Auburn University
Author Profile
Xiuying Zhang
International Institute for Earth System Science
Author Profile
Lingling Deng
East China Normal University
Author Profile
Yuepeng Pan
State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China
Author Profile
Xi Chen
East China Normal University
Author Profile
Yuanchun Yu
East China Normal University
Author Profile
Chunsheng Hu
Chinese Academy of Sciences (CAS)
Author Profile
Rui Wang
East China Normal University
Author Profile
Yaqi Song
East China Normal University
Author Profile
Zhiwei Gao
East China Normal University
Author Profile
Yue Wang
East China Normal University
Author Profile
Lijun Hou
East China Normal University
Author Profile
Min Liu
East China Normal University
Author Profile

Abstract

Abiotic and biotic releases of nitrous acid (HONO) from soils contribute substantially to the missing source of tropospheric HONO and hydroxyl radicals (OH). However, global and regional patterns of soil HONO emissions are rarely quantified, and the contributions of such emissions to atmospheric oxidization capacity are unclear. Here, we present that the best estimate of global soil HONO emissions in 2017 is 9.67 with a range of 7.36-11.99 Tg N yr⁻1, where cropland soils accounted for ~ 79%. The analyses also indicate that regional soil HONO emissions enhanced ground OH concentrations by 10-60% and ozone concentrations by 0.5-1.5 ppb at daytime in the ambient area of Shanghai, China. The impact of soil HONO emissions on OH budgets were more important in rural than urban areas. These findings suggest that the global soil HONO emissions, especially from cropland, could quicken photochemical reactions and aggravate air pollution in rural areas.
27 Mar 2022Published in Journal of Geophysical Research: Atmospheres volume 127 issue 6. 10.1029/2021JD036379