长江三角洲城市群空气质量时空分布特征

发布时间：2018-07-02 11:22

本文选题：长三角城市群 + 时空分布　；参考：《长江流域资源与环境》2017年05期

【摘要】：基于数理统计、空间插值技术、相关性分析与GIS地图表达,研究长江三角洲城市群AQI及各空气含量因子污染浓度的时间、空间分布特征。通过提取国务院最新规划的长江三角洲城市群空间分布数据,划分研究区为"一核五圈",探讨了空气质量指数的时间变化特征和AQI、首要污染物的空间分布规律,定量评价了AQI与其污染因子的相关性,结果表明:(1)时间变化上,长三角城市群空气质量季均变化规律为夏季最好,冬季最差;月均变化呈波浪形分布,在1月份的平均浓度皆为最高;周均变化为:在一周后半段达到一周最大值;(2)空间分布上,分季节看,AQI在春、秋、冬三季空间梯度变化显著,呈现北高、南低的分布格局。在首要污染物的分布上,以PM_(2.5)和O_3均分长三角地区;(3)PM_(2.5)含量空间分布与AQI有较高相似性,均处于北高南低的分布状态,臭氧分布呈现东高西低,即较发达的城市臭氧含量相对较高的空间分布格局。最后通过相关性计算,AQI与PM_(2.5)相关性显著,与O_3没有明显相关性,为长三角大气污染防治提供依据。
[Abstract]:Based on mathematical statistics, spatial interpolation, correlation analysis and GIS map representation, the temporal and spatial distribution characteristics of AQI and air content factor pollution concentration in Yangtze River Delta urban agglomeration were studied. By extracting the spatial distribution data of urban agglomeration in the Yangtze River Delta, which is newly planned by the State Council, the study area is divided into "one core and five circles", and the temporal variation characteristics of air quality index and the spatial distribution of AQI and the primary pollutants are discussed. The correlation between AQI and its pollution factors was evaluated quantitatively. The results showed that: (1) the seasonal variation of air quality in Yangtze River Delta urban agglomeration was the best in summer and the worst in winter. The average concentration in January was the highest, and the weekly average was the highest in the second half of the week; (2) the spatial distribution of AQI in spring, autumn and winter was significant in spring, autumn and winter, showing a distribution pattern of high in the north and low in the south. In the distribution of primary pollutants, PM2.5 and OK3 were used to divide the Yangtze River Delta region, (3) the spatial distribution of PM2.5 content was similar to AQI, and the distribution of ozone was lower in the north and south, and the ozone distribution was lower in the east and the west. That is the spatial distribution pattern of relatively high ozone content in more developed cities. Finally, the correlation between AQI and PM2.5 was significant, but not with OK3, which provided the basis for the prevention and control of atmospheric pollution in Yangtze River Delta.
【作者单位】：江西理工大学建筑与测绘工程学院;
【基金】：国家自然科学基金项目(41261093) 江西省自然科学基金(2010GQS0080)~~
【分类号】：X51

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