This paper analyzes the PM₁₀ concentrations and influences of atmospheric condition (AC) and land coverage (LC) on a high-pollution megacity (Bogota, Colombia) from a public health viewpoint. Information of monitoring stations equipped with measuring devices for PM₁₀/temperature/solar-radiation/wind-speed were used. The research period lasted eight years (2007–2014). AC and LC were determined after comparing daily PM₁₀ concentrations (DPM₁₀) to reference limits published by the World Health Organization (WHO). ARIMA models for DPM₁₀ were also developed. The results indicated that urban sectors with lower atmospheric instability (AI) had a 2.85% increase in daily mortality (DM) in relation to sectors with greater AI. In these sectors of lower AI, impervious LC predominated, instead of vegetated LC. An ARIMA analysis revealed that a greater extent of impervious LC around a station led to a greater effect on previous days’ DPM₁₀ concentrations. Extreme PM₁₀ episodes persisted for up to two days. Extreme pollution episodes were probably also preceded by low mixing-layer heights (between 722–1085 m). The findings showed a 13.0% increase in WHO standard excesses (PE) for each 10 µg/m³ increase in DPM₁₀, and a 0.313% increase in DM for each 10% increase in PE. The observed average reduction of 14.8% in DPM₁₀ (−0.79% in DM) was probably due to 40% restriction of the traffic at peak hours.

中文翻译：

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高污染大城市中PM10的公共卫生注意事项：大气条件和土地覆盖率的影响

本文从公共卫生的角度分析了PM ₁₀浓度以及大气条件（AC）和土地覆盖（LC）对高污染特大城市（哥伦比亚波哥大）的影响。使用了配备有PM ₁₀ /温度/太阳辐射/风速测量设备的监测站的信息。研究期为八年（2007-2014）。在将每日PM ₁₀浓度（DPM ₁₀）与世界卫生组织（WHO）发布的参考限值进行比较后，确定了AC和LC 。DPM _10的ARIMA模型也被开发出来。结果表明，相对于具有较高AI的部门，大气不稳定性（AI）较低的城市部门的日死亡率（DM）增加了2.85％。在AI较低的这些部门中，不渗透LC占主导地位，而不是植被LC。ARIMA分析显示，站点周围较大程度的不可渗透LC会导致对前几天DPM ₁₀浓度的更大影响。极端PM ₁₀集持续了两天。极低的污染事件可能还伴随着较低的混合层高度（722–1085 m之间）。研究结果表明，DPM ₁₀每增加10 µg / m ³，WHO标准过量（PE）就会增加13.0％，PE每增加10％，DM就会增加0.313％。在DPM _10中观察到的平均减少14.8％（在DM中为-0.79％）可能是由于高峰时段的流量限制达到40％。