Assessment of various indoor HONO formation mechanisms based on in situ measurements and modeling
Résumé
The photolysis of HONO has been found to be the oxidation driver through OH formation
in the indoor air measurement campaign SURFin, an extensive campaign carried
out in July 2012 in a classroom in Marseille. In this study, the INCA-Indoor
model
is used to evaluate different HONO formation mechanisms that have been used previously
in indoor air quality models. In order to avoid biases in the results due to the
uncertainty in rate constants, those parameters were adjusted to fit one representative
day of the SURFin campaign. Then, the mechanisms have been tested with the
optimized parameters against other experiments carried out during the SURFin campaign.
Based on the observations and these findings, we propose a new mechanism
incorporating sorption of NO2 onto surfaces with possible saturation of these surfaces.
This mechanism is able to better reproduce the experimental profiles over a
large range of conditions.