关中地区冬季人为源减排对PM25浓度的影响.PDF

中国环境科学 2017,37(5) ：1646~1656 China Environmental Science 关中地区冬季人为源减排对 PM2.5 浓度的影响 孟 宁 1,贝耐芳 1*,李国辉 2, 肖 波 1,3 (1.西安交通大学人居环境与建筑工程学院地球环境科学系,陕西 西安 710049 ；2. 中国科学院地球环境研究所中科院气溶胶化学与物理重点实验室,陕西 西安 710061 ；3.西安市气象局, 陕西 西安 710016) 摘要：使用 WRF-Chem 模式和关中地区高分辨率的人为源排放清单,选取 2013 年冬季不利于关中地区污染物扩散的 4 类典型天气形势中 的各 1d,模拟了 PM2.5 时空分布和日变化趋势, 同时以国家环境空气质量标准为目标,制定人为源等比例减排的敏感性试验.结果表明,模式可 以较好地捕捉 PM2.5 的时空分布和变化趋势,且与天气形势有着一致的对应关系.在 4 类不利天气形势下,PM2.5 浓度随着人为排放源的减少 呈二次曲线下降趋势,PM2.5 浓度下降率与所在区域原有大气污染程度成正比.在不同天气形势下,要使 PM2.5 浓度达到国家环境空气质量标 准 75µg/m3 时,人为源需削减比例为 30%~60%. 关键词：天气形势；PM2.5 ；关中地区；人为源减排 中图分类号：X513 文献标识码：A 文章编号：1000-6923(2017)05-1646-11 Response of the wintertime PM2.5 level to anthropogenic emission mitigations in the Guanzhong basin. MENG Ning 1 1* 2 1,3 , BEI Nai-fang , LI Guo-hui , XIAO Bo (1.Department of Environmental Science and Technology, School of Human Settlements and Civil Engineering, Xian Jiaotong University, Xian 710049, China ；2.Key Lab of Aerosol Chemistry Physics, Chinese Academy of Sciences (KLACP), Institute of Earth Environment, Chinese Academy of Sciences, Xian 710061, China；3.Xian Meteorological Bureau of Shannxi Province, Xian 710016, China). China Environmental Science, 2017,37(5)：1646~1656 Abstract ：Based on the analysis of four typical unfavorable synoptic situations during wintertime in the Guanzhong basin (GZB), the WRF-Chem model had been applied to simulate the selected four days representing the four unfavorable synoptic situations during the wintertime of 2013. The results generally showed good consistence between the modeled and observed PM2.5 distributions and variations. Further studies had been performed to verify the PM2.5 response to the ant