Skip to Main content Skip to Navigation
Journal articles

Diurnal fluxes of HONO above a crop rotation

Abstract : Nitrous acid (HONO) fluxes were measured above an agricultural field site near Paris during different seasons. Above bare soil, different crops were measured using the aerodynamic gradient (AG) method. Two LOPAPs (LOng Path Absorption Photometer) were used to determine the HONO gradients between two heights. During daytime mainly positive HONO fluxes were observed, which showed strong correlation with the product of the NO2 concentration and the long wavelength UV light intensity, expressed by the photolysis frequency J(NO2). These results are consistent with HONO formation by photosensitized heterogeneous conversion of NO2 on soil surfaces as observed in recent laboratory studies. An additional influence of the soil temperature on the HONO flux can be explained by the temperature-dependent HONO adsorption on the soil surface. A parameterization of the HONO flux at this location with NO2 concentration, J(NO2), soil temperature and humidity fits reasonably well all flux observations at this location.
Document type :
Journal articles
Complete list of metadatas

Cited literature [94 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-01583184
Contributor : Archive Ouverte Prodinra <>
Submitted on : Tuesday, May 26, 2020 - 3:32:54 AM
Last modification on : Tuesday, September 8, 2020 - 2:24:02 PM

File

2017_Laufs_Atmos Chem Phys_1.p...
Publisher files allowed on an open archive

Licence


Distributed under a Creative Commons Attribution 4.0 International License

Identifiers

Citation

Sebastian Laufs, Mathieu Cazaunau, Patrick Stella, Ralf Kurtenbach, Pierre Cellier, et al.. Diurnal fluxes of HONO above a crop rotation. Atmospheric Chemistry and Physics, European Geosciences Union, 2017, 17 (11), pp.6907-6923. ⟨10.5194/acp-17-6907-2017⟩. ⟨hal-01583184⟩

Share

Metrics

Record views

1114

Files downloads

283