Temporal and Spatial Changes of PM 2.5 Pollution in China from 2013 to 2015

Q2 Environmental Science

环境科学研究 Pub Date : 2017-05-25 DOI:10.13198/J.ISSN.1001-6929.2017.01.93

李沈鑫, 邹滨, 刘兴权, 方新

引用次数: 1

摘要

Since the first nationwide ground level monitoring of PM2.5 in China in 2013, there have been few studies analyzing the overall spatiotemporal changes of PM2.5 pollution in the past three years at the national spatial scale, identifying the spatial range of PM2.5 pollution exacerbation or mitigation, and lacking direct comparative evaluation of the differences in PM2.5 pollution characteristics changes inside and outside the national key air pollution prevention and control areas. Based on PM2.5 monitoring data from 2013 to 2015, Comprehensively utilizing spatiotemporal statistical analysis and spatial interpolation mapping methods, revealing the past 3 years ρ (PM2.5) and the spatiotemporal variation pattern of pollution days at different levels, with a focus on comparing and analyzing the inside and outside of the "three zones and ten groups" region ρ The difference in changes in (PM2.5). The results show that from 2013 to 2015, there were 335 monitoring stations out of 413 continuously monitored nationwide ρ The average annual concentration of (PM2.5) has decreased, with 218 stations achieving two consecutive years of annual concentration reduction and 74 stations ρ The average annual value of (PM2.5) has been reduced to meet the national second level standard; Most parts of the country ρ The annual exceeding standard rate of (PM2.5) has decreased from over 50% to below 30%, the proportion of heavily polluted sites has decreased from 88.38% to 73.77%, and the proportion of severely polluted sites has decreased from 65.86% to 36.35%; The PM2.5 pollution in the Yangtze River Delta urban agglomeration, Changzhutan urban agglomeration, Wuhan and surrounding urban agglomeration, and Shaanxi Guanzhong urban agglomeration shows a significant improvement trend; Xizang, the Yunnan-Guizhou Plateau, urban agglomeration on the west side of the Straits, Pearl River Delta urban agglomeration and other coastal areas ρ (PM2.5) has been consistently low, with relatively good air quality; However, at the same time, the Beijing Tianjin Hebei urban agglomeration, the Shandong Peninsula urban agglomeration, and the central and northern regions of Henan Province are still areas of heavy PM2.5 pollution in China. New PM2.5 heavy pollution patterns are gradually forming in southwestern Xinjiang, Hefei, Nanchang, and other regions

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2013—2015年中国PM 2.5 污染状况时空变化

自2013年我国首次开展全国范围PM2.5近地面监测以来，少有研究从全国空间尺度分析近3年全国PM2.5污染状况时空变化的总体特征，识别PM2.5污染加剧或缓解的空间范围，更缺乏直接对比评估国家大气污染重点防控区内外PM2.5污染特征变化的差异.基于2013—2015年PM2.5监测数据，综合运用时空统计分析与空间插值制图手段，揭示近3年ρ(PM2.5)及不同等级污染天数的时空变化格局，并着重对比分析“三区十群”区域内外ρ(PM2.5)的变化差异.结果表明，2013—2015年，全国持续监测的413个站点中有335个监测站点ρ(PM2.5)年均值下降，其中218个站点实现连续两年年均浓度降低，74个站点ρ(PM2.5)年均值降至符合国家二级标准；全国大部分地区ρ(PM2.5)年超标率由50%以上降至30%以下，重度污染站点占比由88.38%降至73.77%，严重污染站点占比由65.86%降至36.35%；长三角城市群、长株潭城市群、武汉及周边城市群、陕西关中城市群PM2.5污染呈现明显好转趋势；西藏、云贵高原以及海峡西岸城市群、珠三角城市群等沿海地区ρ(PM2.5)一直较低，空气质量相对优良；但与此同时，京津冀城市群、山东半岛城市群及河南中部和北部地区仍是中国PM2.5重污染区域，新疆西南部、合肥、南昌等地区逐渐形成新的PM2.5重污染格局.

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来源期刊

环境科学研究 Environmental Science-Environmental Science (miscellaneous)

CiteScore

3.80

自引率

0.00%

发文量

6496

期刊介绍：