DOI: 10.1016/j.atmosenv.2017.05.007
Scopus记录号: 2-s2.0-85019062198
论文题名: Urban airborne matter in central and southern Chile: Effects of meteorological conditions on fine and coarse particulate matter
作者: Yáñez M ; A ; , Baettig R ; , Cornejo J ; , Zamudio F ; , Guajardo J ; , Fica R
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 161 起始页码: 221
结束页码: 234
语种: 英语
英文关键词: Generalized additive models
; Meteorology
; PM2.5
; PMcoarse
Scopus关键词: Meteorology
; Particles (particulate matter)
; Coarse particulate matter
; Generalized additive model
; Global environmental problems
; Meteorological condition
; Meteorological parameters
; Meteorological variables
; Respirable particulate matters
; Temperature and relative humidity
; Wind
; atmospheric modeling
; atmospheric pollution
; meteorology
; particulate matter
; public health
; relative humidity
; urban area
; urban pollution
; wind velocity
; air pollution
; airborne particle
; Article
; Chile
; city
; environmental temperature
; humidity
; latitude
; particulate matter
; priority journal
; seasonal variation
; spring
; summer
; urban area
; velocity
; wind
; winter
; Chile
; Metropolitana
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Air pollution is one of the major global environmental problems affecting human health and life quality. Many cities of Chile are heavily polluted with PM2.5 and PM10, mainly in the cold season, and there is little understanding of how the variation in particle matter differs between cities and how this is affected by the meteorological conditions. The objective of this study was to assess the effect of meteorological variables on respirable particulate matter (PM) of the main cities in the central-south valley of Chile during the cold season (May to August) between 2014 and 2016. We used hourly PM2.5 and PMcoarse (PM10- PM2.5) information along with wind speed, temperature and relative humidity, and other variables derived from meteorological parameters. Generalized additive models (GAMs) were fitted for each of the eight cities selected, covering a latitudinal range of 929 km, from Santiago to Osorno. Great variation in PM was found between cities during the cold months, and that variation exhibited a marked latitudinal pattern. Overall, the more northerly cities tended to be less polluted in PM2.5 and more polluted in PMcoarse than the more southerly cities, and vice versa. The results show that other derived variables from meteorology were better related with PM than the use of traditional daily means. The main variables selected with regard to PM2.5 content were mean wind speed and minimum temperature (negative relationship). Otherwise, the main variables selected with regard to PMcoarse content were mean wind speed (negative), and the daily range in temperature (positive). Variables derived from relative humidity contributed differently to the models, having a higher effect on PMcoarse than PM2.5, and exhibiting both negative and positive effects. For the different cities the deviance explained by the GAMs ranged from 37.6 to 79.1% for PM2.5 and from 18.5 to 63.7% for PMcoarse. The percentage of deviance explained by the models for PM2.5 exhibited a latitudinal pattern, which was not observed in PMcoarse. This highlights the greater predictability of PM2.5 according to meteorological parameters in the cities to the south. Southern cities located spatially close to one another had similar patterns in both the selected variables for the models and the trends. The meteorological factor influencing the cities had a major impact on PM concentrations. The findings of this study may aid understanding of PM variation across the country, in the way of improving forecasting models. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82524
Appears in Collections: 气候变化事实与影响
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作者单位: Poplar Technology Center (PTC), University of Talca, 2 Norte 685, P.O. Box 747, Talca, Chile; Ministry of the Environment, 1 Oriente 1590, Talca, Chile
Recommended Citation:
Yáñez M,A,, Baettig R,et al. Urban airborne matter in central and southern Chile: Effects of meteorological conditions on fine and coarse particulate matter[J]. Atmospheric Environment,2017-01-01,161