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• W2801996267 abstract "Long- and short-term exposure to PM2.5 is of great concern in China due to its adverse population health effects. Characteristic of the severity of the situation in China is that in the Jing-Jin-Ji region considered in this work a total of 2725 excess deaths have been attributed to short-term PM2.5 exposure during the period January 10-31, 2013. Technically, the processing of large space-time PM2.5 datasets and the mapping of the space-time distribution of PM2.5 concentrations often constitute high-cost projects. To address this situation, we propose a synthetic modeling framework based on the integration of (a) the Bayesian maximum entropy method that assimilates auxiliary information from land-use regression and artificial neural network (ANN) model outputs based on PM2.5 monitoring, satellite remote sensing data, land use and geographical records, with (b) a space-time projection technique that transforms the PM2.5 concentration values from the original spatiotemporal domain onto a spatial domain that moves along the direction of the PM2.5 velocity spread. An interesting methodological feature of the synthetic approach is that its components (methods or models) are complementary, i.e., one component can compensate for the occasional limitations of another component. Insight is gained in terms of a PM2.5 case study covering the severe haze Jing-Jin-Ji region during October 1-31, 2015. The proposed synthetic approach explicitly accounted for physical space-time dependencies of the PM2.5 distribution. Moreover, the assimilation of auxiliary information and the dimensionality reduction achieved by the synthetic approach produced rather impressive results: It generated PM2.5 concentration maps with low estimation uncertainty (even at counties and villages far away from the monitoring stations, whereas during the haze periods the uncertainty reduction was over 50% compared to standard PM2.5 mapping techniques); and it also proved to be computationally very efficient (the reduction in computational time was over 20% compared to standard mapping techniques)." @default.
• W2801996267 created "2018-05-17" @default.
• W2801996267 creator A5062894234 @default.
• W2801996267 creator A5085867269 @default.
• W2801996267 date "2018-09-01" @default.
• W2801996267 modified "2023-10-17" @default.
• W2801996267 title "Space-time PM2.5 mapping in the severe haze region of Jing-Jin-Ji (China) using a synthetic approach" @default.
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• W2801996267 doi "https://doi.org/10.1016/j.envpol.2018.04.092" @default.
• W2801996267 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/29751328" @default.
• W2801996267 hasPublicationYear "2018" @default.
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