Articles | Volume 12, issue 12
Atmos. Meas. Tech., 12, 6449–6463, 2019
https://doi.org/10.5194/amt-12-6449-2019

Special issue: In-depth study of air pollution sources and processes within...

Atmos. Meas. Tech., 12, 6449–6463, 2019
https://doi.org/10.5194/amt-12-6449-2019

Research article 09 Dec 2019

Research article | 09 Dec 2019

Intercomparison of nitrous acid (HONO) measurement techniques in a megacity (Beijing)

Leigh R. Crilley et al.

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Latest update: 28 Feb 2021
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Short summary
Nitrous acid (HONO) is key species for understanding tropospheric chemistry, yet accurate and precise measurements are challenging. Here we report an inter–comparison exercise of a number of instruments that measured HONO in a highly polluted location (Beijing). All instruments agreed on the temporal trends yet displayed divergence in absolute concentrations. The cause of this divergence was unclear, but it may in part be due to spatial variability in instrument location.