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• W3119150912 endingPage "129611" @default.
• W3119150912 startingPage "129611" @default.
• W3119150912 abstract "Modelling photochemical pollutants, such as ground level ozone (O3), nitric oxide (NO) and nitrogen dioxide (NO2), in urban terrain was proven to be cardinal, chronophagous and complex. We built linear regression and random forest regression models using 4-years (2015–2018; hourly-averaged) observations for forecasting O3, NO and NO2 levels for two scenarios (1-month prediction (for January 2019) and 1-year prediction (for 2019)) — with and without the impact of meteorology. These flexible models have been developed for, both, localised (site-specific models) and combined (indicative of city-level) cases. Both models were aided with machine learning, to reduce their time-intensity compared to models built over high-performance computing. O3 prediction performance of linear regression model at the city level, under both cases of meteorological consideration, was found to be significantly poor. However, the site-specific model with meteorology performed satisfactorily (r = 0.87; RK Puram site). Further, during testing, linear regression models (site-specific and combined) for NO and NO2 with meteorology, show a slight improvement in their prediction accuracies when compared to the corresponding equivalent linear models without meteorology. Random forest regression with meteorology performed satisfactorily for indicative city-level NO (r = 0.90), NO2 (r = 0.89) and O3 (r = 0.85). In both regression techniques, increased uncertainty in modelling O3 is attributed to it being a secondary pollutant, non-linear dependency on NOx, VOCs, CO, radicals, and micro-climatic meteorological parameters. Analysis of importance among various precursors and meteorology have also been computed. The study holistically concludes that site-specific models with meteorology perform satisfactorily for both linear regression and random forest regression." @default.
• W3119150912 created "2021-01-18" @default.
• W3119150912 creator A5004907604 @default.
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• W3119150912 creator A5089346942 @default.
• W3119150912 date "2021-06-01" @default.
• W3119150912 modified "2023-10-18" @default.
• W3119150912 title "Regression-based flexible models for photochemical air pollutants in the national capital territory of megacity Delhi" @default.
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• W3119150912 doi "https://doi.org/10.1016/j.chemosphere.2021.129611" @default.
• W3119150912 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33482521" @default.
• W3119150912 hasPublicationYear "2021" @default.
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