京津冀大气污染传输通道区大气污染时空格局研究

客观理解京津冀大气污染传输通道城市（“2+26”城市）空气污染时空格局对于区域大气污染联合防治具有重要意义.本研究采用遥感数据反演的PM_2.5浓度产品,利用趋势分析法和重心分析法,揭示了京津冀城市大气污染传输通道区2000~2015年大气污染时空格局演化特征.结果表明：（1）区域PM_2.5平均浓度整体呈现出太行山脉区域较低,太行山脉以东较高的格局,城镇地区明显高于周边地区.（2）2000~2015年区域PM_2.5年均浓度总体呈增加趋势,主要表现在2000~2007年,呈显著增加趋势的面积占全区的88.48%,之后呈稳定状态.（3）区域PM_2.5污染重心位于衡水、邢台和德州3市交界处,区域北部大气污染较严重.本研究可为京津冀及周边地区大气污染防治政策制定和措施实施提供参考与支持.

Spatiotemporal patterns of air pollution in air pollution transmission channel of Beijing-Tianjin-Hebei from 2000 to 2015

It is of great significance for preventing and controlling regional air pollution to understand spatiotemporal patterns of air pollution in air pollution transmission channel (also known as "2+26" cities) of the Beijing-Tianjin-Hebei area. Spatial pattern and temporal variation of air pollution in "2+26" cities was revealed with the satellite-derived PM_2.5 concentration data from 2000 to 2015 and the linear trend analysis and the barycenter analysis. The main findings are as follows:PM_2.5 concentration was lower in the west and higher in the east with the Taihang Mountain as the demarcation. And that in the center of the city was higher than that in surrounding regions. The concentration of PM_2.5 generally showed an increasing trend from 2000 to 2015, especially during 2000~2007. The area with significant increasing trend during 2000~2007 accounted for 88.48% of the total area. The gravity center of PM_2.5 pollution was located at the junction of Hengshui, Xingtai and Dezhou, which indicated that the pollution in the north of the study area was more serious. This study could provide reference and support for policy formulation and implementation of air pollution control measures in Beijing-Tianjin-Hebei regions.