| 关中地区PM2.5时空演化及人口暴露风险 |
| 摘要点击 2864 全文点击 1314 投稿时间：2020-04-22 修订日期：2020-06-17 |
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| 中文关键词 PM2.5 时空演化 人口暴露风险 关中地区 Theil-Sen趋势分析 |
| 英文关键词 PM2.5 spatial and temporal evolution population exposure risk Guanzhong area Theil-Sen Median trend analysis |
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| 中文摘要 |
| 近年来以细颗粒物PM2.5为代表的大气污染已给人体健康带来严重风险.基于PM2.5遥感反演数据和人口格网分布数据，测度关中地区人口暴露于PM2.5的风险程度，并采用Theil-Sen Median趋势分析、Mann-Kendall检验和空间自相关分析等方法，探索2000~2016年关中地区PM2.5及人口暴露风险的时空演化过程.结果表明：①2006、2007和2013年关中地区污染重且范围广，这3 a在40%以上区域PM2.5年均质量浓度超过了35 μg·m-3的限值，2000~2016年关中地区PM2.5空间分布范围不断扩大，形成了自中部向东北部的连续带状集中分布区；②2000~2016年，关中地区几乎每年都有超过60%的人口暴露在PM2.5年均35 μg·m-3质量浓度限值以上，且人口暴露风险不断加剧，尤其是2011年后，人口暴露的高风险区范围持续增加；③2000~2016年关中地区PM2.5人口暴露风险格局大体相似，较高等级以上风险区主要集中在关中地区中部，东西方向上形成连续的带状分布区，高值区集中在几个主要城市的中心城区，低值区则主要分布在关中地区周边广大区域. |
| 英文摘要 |
| In recent years, atmospheric pollution represented by fine particulate matter PM2.5 pollution has seriously threatened human health. Therefore, it is important to identify the risk level of population exposure to PM2.5. Based on PM2.5 remote sensing inversion data and population distribution, this study measured the risk level of population exposure to PM2.5 in the Guanzhong area. Furthermore, the methods of Theil-Sen Median trend analysis, Mann-Kendall test, and geo-spatial analysis were used to reveal the temporal and spatial characteristics of population exposures risk to PM2.5 in the Guanzhong area from 2000 to 2016. The results show that:①The years with heavy pollution and wide range in the Guanzhong area are 2006, 2007, and 2013, and the annual average concentration of PM2.5 exceeded 35 μg·m-3 in more than 40% of the Guanzhong area. From 2000 to 2016, the spatial distribution range of PM2.5 in the Guanzhong area continued to expand, forming a continuous belt-shaped concentrated distribution area from the center to the northeast. ②More than 60% of the population in the Guanzhong area was exposed in the areas with annual average concentration of PM2.5 above 35 μg·m-3 from 2000 to 2016, and the population exposure risk continued to increase, especially after 2011, the range of the high-risk area expanded dramatically. ③The pattern of population exposure risk to PM2.5 in the Guanzhong area was generally similar from 2000 to 2016. The areas with higher risk levels were mainly concentrated in the central Guanzhong area, forming a continuous belt-shaped distribution area from west to east. The areas with the highest value were distributed in the urban areas of several major cities, while the areas with the lowest value were mainly concentrated in the surrounding areas of Guanzhong. |
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