VandenBoer, TrevorEbrahimi-Iranpour, Yashar2025-11-112025-11-112025-04-302025-11-11https://hdl.handle.net/10315/43232This study was undertaken in order to study the vertical distribution and surface interactions of gas-phase HONO under non-ideal mixing conditions during the 2011 NACHTT campaign using the Platform for Atmospheric Chemistry and vertical Transport in One Dimension (PACT-1D) model. This work builds on a previous 0D modelling study from the NACHTT campaign, where the greatest unknown source rate of HONO was found during the early morning when a morning burst of HONO were observed and a stable nocturnal boundary layer formed. The 48-hour model was initialized using observational constraints selected during periods where a morning burst of HONO were observed and a stable nocturnal boundary formed. The modelled HONO showed excellent agreement with observations when heterogeneous ground surface processes of HONO, surface water, and vertical mixing were accounted for without the need to apply additional daytime sources of HONO.Author owns copyright, except where explicitly noted. Please contact the author directly with licensing requests.Atmospheric chemistryAtmospheric sciencesMeteorologyElectronic Thesis or Dissertation2025-11-111D ModellingVertical distribution of Nitrous AcidHONOSurface interactionsNocturnal boundary layer dynamicsNACHTT campaignAtmospheric chemistry and vertical transport modelAtmospheric chemistryVertical transport modelNO2 hydrolysisDry depositionVertical mixing