https://scholars.lib.ntu.edu.tw/handle/123456789/350810
標題: | Spatiotemporal modelling of ozone distribution in the State of California | 作者: | Bogaert, P. Christakos, G. Jerrett, M. HWA-LUNG YU |
關鍵字: | Air pollution; BME; California; GIS; Mapping; Ozone; Random fields; Seasonal variations | 公開日期: | 2009 | 卷: | 43 | 期: | 15 | 起(迄)頁: | 2471-2480 | 來源出版物: | Atmospheric Environment | 摘要: | This paper is concerned with the spatiotemporal mapping of monthly 8-h average ozone (O3) concentrations over California during a 15-years period. The basic methodology of our analysis is based on the spatiotemporal random field (S/TRF) theory. We use a S/TRF decomposition model with a dominant seasonal O3 component that may change significantly from site to site. O3 seasonal patterns are estimated and separated from stochastic fluctuations. By means of Bayesian Maximum Entropy (BME) analysis, physically meaningful and sufficiently detailed space-time maps of the seasonal O3 patterns are generated across space and time. During the summer and winter months the seasonal O3 concentration maps exhibit clear and progressively changing geographical patterns over time, suggesting the existence of relationships in accordance with the typical physiographic and climatologic features of California. BME mapping accuracy can be superior to that of other techniques commonly used by EPA; its framework can rigorously assimilate useful data sources that were previously unaccounted for; the generated maps offer valuable assessments of the spatiotemporal O3 patterns that can be helpful in the identification of physical mechanisms and their interrelations, the design of human exposure and population health models, and in risk assessment. As they focus on the seasonal patterns, the maps are not contingent on short-time and locally prevalent weather conditions, which are of no interest in a global and non-forecasting framework. Moreover, the maps offer valuable insight about the space-time O3 concentration patterns and are, thus, helpful for disentangling the influence of explanatory factors or even for identifying some influential ones that could have been otherwise overlooked. © 2009 Elsevier Ltd. All rights reserved. |
URI: | http://www.scopus.com/inward/record.url?eid=2-s2.0-63249133514&partnerID=MN8TOARS http://scholars.lib.ntu.edu.tw/handle/123456789/350810 |
DOI: | 10.1016/j.atmosenv.2009.01.049 | SDG/關鍵字: | BME; California; GIS; Random fields; Seasonal variations; Air quality; Environmental Protection Agency; Geographic information systems; Health risks; Machine design; Models; Nematic liquid crystals; Ozone; Risk management; Risk perception; Risk assessment; ozone; atmospheric modeling; atmospheric pollution; Bayesian analysis; climate conditions; concentration (composition); GIS; health risk; ozone; pollution exposure; risk assessment; seasonal variation; spatial variation; spatiotemporal analysis; article; Bayes theorem; exposure; health; model; priority journal; risk assessment; space; summer; time; United States; weather; winter; California; North America; United States |
顯示於: | 生物環境系統工程學系 |
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