Development of an atmospheric chemistry model coupled to the PALM model system 6.0: implementation and first applications

摘要: Abstract. In this article we describe the implementation of an online-coupled gas-phase chemistry model in turbulence resolving PALM system 6.0. The new is part PALM-4U components (read: for you; urban applications) which are designed application environment (Maronga et al., 2020). latest version Kinetic PreProcessor (KPP, 2.2.3), has been utilised numerical integration chemical reactions. A number tropospheric mechanisms different complexity have implemented ranging from photostationary state to more complex such as CBM4, includes major pollutants namely O3, NO, NO2, CO, a simplified VOC and small products. Further can also be easily added by user. work, provide detailed description model, its structure along with various features, input requirements, limitations. case study presented demonstrate environment. computation domain comprised Berlin, Germany, covering area 6.71 × 6.71 km horizontal resolution 10 m. We used "PARAMETERIZED" emission mode that only considers emissions traffic sources. Three varying one no-reaction (passive) applied results compared observations two permanent air quality stations Berlin fall within domain. show importance online photochemistry dispersion boundary layer. simulated NOx O3 species reasonable agreement observations. better during midday poorest evening transition hours at night. CBM4 SMOG than steady PHSTAT mechanism.