Nudging technique for scale bridging in air quality/climate atmospheric composition modelling

TitleNudging technique for scale bridging in air quality/climate atmospheric composition modelling
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2012
AuthorsMaurizi, A., Russo Felicita, D'Isidoro Massimo, and Tampieri F.
JournalAtmospheric Chemistry and Physics
Volume12
Pagination3677-3685
ISSN16807316
KeywordsAir quality, Atmospheric chemistry, atmospheric modeling, Chemical composition, climate effect, Equus asinus, Italy, numerical model, Po Valley, seasonal variation, time dependent behavior
Abstract

The interaction between air quality and climate involves dynamical scales that cover a very wide range. Bridging these scales in numerical simulations is fundamental in studies devoted to megacity/hot-spot impacts on larger scales. A technique based on nudging is proposed as a bridging method that can couple different models at different scales. Here, nudging is used to force low resolution chemical composition models with a run of a high resolution model on a critical area. A one-year numerical experiment focused on the Po Valley hot spot is performed using the BOLCHEM model to asses the method. The results show that the model response is stable to perturbation induced by the nudging and that, taking the high resolution run as a reference, performances of the nudged run increase with respect to the non-forced run. The effect outside the forcing area depends on transport and is significant in a relevant number of events although it becomes weak on seasonal or yearly basis. © 2012 Author(s).

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84860110918&doi=10.5194%2facp-12-3677-2012&partnerID=40&md5=85ea20c778deccd86ad85a53f138bbbe
DOI10.5194/acp-12-3677-2012