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Trend Analysis of Historical Ambient Air Monitoring Data in Edmonton and Fort McKay, Alberta

机译：埃尔伯塔州埃德蒙顿和麦凯港历史环境空气监测数据趋势分析

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Collecting and analyzing ambient air monitoring data is valuable for understanding the state of air quality and addressing perceptions and concerns about it relates to health impacts. Analysis of trends provides an indication of whether air quality is changing for better or worse. This paper provides results of trend analysis of ambient air data at two Alberta monitoring stations: 1) in Edmonton - a major city in central Alberta with a regional population of about 1,000,000, and 2) in Fort McKay - a small community of 400 people situated among expanding oil sand extraction and production facilities in northern Alberta. Using an assumption that ambient air concentrations display a trend with time, two non-parametric methods were used - the Mann-Kendall test and Sen's test. Historical data for a number of air pollutants were examined over an eight-year period at the two monitoring stations. Pollutant concentrations and hourly exceedance frequencies corresponding to cumulative frequency values of the 50% (median), 65%, 80%, 90% and 95% percentiles for each year were examined in the analysis. Statistically significant decreasing trends were observed for SO2, CO, and PM_2.5 at Edmonton (α=0.10, α=0.05, or α=0.01), while no trends were observed for NO2, O3, and total hydrocarbons (THCs) (α=0.10) for the eight-year period 1997 to 2004. No statistically significant trends were observed for SO2, NO2, O3, PM_2.5, and THCs at Fort McKay (α=0.10) for the six-year period 1999 to 2004. The period of study over which trends were examined was short - less than a decade. Changes or lack of changes observed in air quality do not necessarily provide an indication of what may happen over the long-term. However results generally support that, despite increasing economic and other development activity in Edmonton and continuous oil sands development surrounding the community of Fort McKay, air quality remains unchanged during the last six to eight years.
机译：收集和分析环境空气监测数据对于了解空气质量的状态和解决其关于其涉及健康影响的顾虑是有价值的。趋势分析提供了空气质量是否变化的指示，以便更好或更糟。本文提供了在艾伯塔省监测站的环境空中数据趋势分析的结果：1）在埃德蒙顿 - 艾伯塔省中部的一个主要城市，区域人口约为1,000,000，以及2）在堡垒McKay - 一个400人的小社区位于在Alberta Northern Alborth的扩大油沙提取和生产设施中。使用假设环境空气浓度随时间显示趋势，使用了两种非参数方法 - Mann-Kendall测试和森的测试。在两个监测站的八年期间检查了许多空气污染物的历史数据。在分析中检查了污染物浓度和对应于50％（中位数），65％，80％，90％和95％百分比的累积频率值的频率。在Edmonton（α= 0.10，α= 0.05或α= 0.05）的SO2，CO和PM_2.5中观察到统计学显着的降低趋势，而NO 2，O 3和总烃（THC）没有观察到趋势（α = 0.10）1997年至2004年八年期间。1999年至2004年六年期间，SO2，NO2，O3，PM_2.5和THC，八年期间没有观察到统计上显着的趋势。研究趋势的研究期限短于十年。在空气质量中观察到的变化或缺乏变化不一定能够提供长期可能发生的事情的指示。然而，结果普遍支持，尽管埃德蒙顿的经济和其他发展活动增加了埃德蒙顿和堡垒阵线社区的连续油砂发展，但在过去六到八年内，空气质量保持不变。

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