| 基于光化学指标法的邯郸市臭氧生成敏感性 |
| 摘要点击 2299 全文点击 735 投稿时间：2020-10-29 修订日期：2020-12-07 |
| 查看HTML全文
查看全文 查看/发表评论 下载PDF阅读器 |
| 中文关键词 WRF-CMAQ 光化学指标 邯郸市 臭氧 敏感性 |
| 英文关键词 WRF-CMAQ photochemical indicator Handan City ozone sensitivity |
| 作者 | 单位 | E-mail | | 牛元 | 北京工业大学环境与能源工程学院, 区域大气复合污染防治北京市重点实验室, 北京 100124 | niuyuan@emails.bjut.edu.cn | | 程水源 | 北京工业大学环境与能源工程学院, 区域大气复合污染防治北京市重点实验室, 北京 100124 | chengsy@bjut.edu.cn | | 欧盛菊 | 北京工业大学环境与能源工程学院, 区域大气复合污染防治北京市重点实验室, 北京 100124 | | | 姚诗音 | 北京工业大学环境与能源工程学院, 区域大气复合污染防治北京市重点实验室, 北京 100124 | | | 沈泽亚 | 北京工业大学环境与能源工程学院, 区域大气复合污染防治北京市重点实验室, 北京 100124 | | | 关攀博 | 北京工业大学环境与能源工程学院, 区域大气复合污染防治北京市重点实验室, 北京 100124 | |
|
| 中文摘要 |
| 邯郸市近年来O3污染状况越发严峻，2018年夏季（6~8月），邯郸市O3日最大8 h平均浓度为175μg·m-3，超标天数达54 d，超标率59%，最高浓度达257μg·m-3.本研究应用WRF-CMAQ模式系统和光化学指标法对邯郸市夏季O3生成敏感性特征进行分析.结果表明，用H2O2/HNO3表征O3生成敏感性较其他指标在理论和模拟效果方面均更合适.基于精细化的源清单和网格分辨率，CMAQ对H2O2和HNO3有较好的模拟效果.对H2O2/HNO3的模拟结果显示，邯郸市VOCs控制区范围逐月减少，6月协同控制区范围占比最大，7月和8月以NOx控制区为主.邯郸市各区县VOCs和NOx排放量比值显著的空间差异，是O3生成敏感性差别的主要原因.VOCs/NOx<1.7的区域，其O3生成趋向于受VOCs控制，邯郸南部VOCs/NOx>6.9的区域，NOx是O3生成的主控因子，1.7x<6.9的区域更易受到VOCs和NOx的协同控制.当HCHO/NO2、O3/HNO3和O3/NOx过渡范围分别为0.35~0.6、20~35和10~25时，可以得到与H2O2/HNO3较为一致的敏感性空间分布，H2O2/（O3+NO2）不能指示出与其他指标一致的结果，表明该指标可能不适用于邯郸市. |
| 英文摘要 |
| Ozone pollution in Handan has become severe in recent years and in the summer of 2018, the average maximum daily 8-hour average ozone concentration in Handan was 175 μg·m-3 with a maximum of 257 μg·m-3. Ozone concentrations exceeded the National Air Quality Grade Ⅱ Standard in 59% of cases. In this study, the H2O2/HNO3 indicator was applied to analyze summertime ozone sensitivity in Handan using the WRF-CMAQ modeling system. The results showed that H2O2/HNO3 was more appropriate than other ozone indicators, both theoretically and based on simulation outputs. The good simulation effect of CMAQ on H2O2 and HNO3 was attributed to fine emission inventory and grid resolution. The H2O2/HNO3 simulation results showed that the relative importance of a VOCs-limited regime decreased month by month; a VOCs-NOx-mixed-limited regime was dominant in June; and a NOx-limited regime was more dominant in July and August than in June. The remarkable spatial difference in VOCs and NOx emission ratios among the counties of Handan led to differences in ozone sensitivity. The VOCs-limited regime was concentrated in counties where VOCs/NOx emission ratios were lower than 1.7. Southern counties had a NOx-limited regime, where VOCs/NOx emission ratios were higher than 6.9. Counties with VOCs/NOx emission ratios varying from 1.7 to 6.9 were more susceptible to both VOCs and NOx. According to these results, the transition range of HCHO/NO2, O3/HNO3, and O3/NOx ratios were adjusted to 0.35-0.6, 20-35, and 10-25 respectively. Adjusting the transition range of H2O2/(O3+NO2) was not effective, indicating that this indicator may not be applicable to Handan. |
|
|
|
