Atmospheric Measurement Techniques
Atmospheric Measurement Techniques
AMT
Articles | Volume 15, issue 6
Articles | Volume 15, issue 6
https://doi.org/10.5194/amt-15-1983-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-15-1983-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 15, issue 6
Research article
 | 
31 Mar 2022
Research article |  | 31 Mar 2022

A relaxed eddy accumulation (REA) LOPAP system for flux measurements of nitrous acid (HONO)

Lisa von der Heyden, Walter Wißdorf, Ralf Kurtenbach, and Jörg Kleffmann

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Latest update: 17 Sep 2025
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Short summary
A relaxed eddy accumulation (REA) system based on the LOPAP technique for the quantification of vertical fluxes of nitrous acid (HONO) was developed and tested in a field campaign. Typical diurnal variations of the HONO fluxes were observed with low, partly negative fluxes during night-time and higher positive fluxes around noon. The highest correlation of the HONO flux was observed with the product of the NO2 photolysis frequency and the NO2 concentration.
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