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| 莆田地区夜间臭氧污染成因分析 |
| Cause Analysis of Nighttime Ozone Pollution in Putian |
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| DOI： |
| 中文关键词: 臭氧 污染成因 夜间 后向轨迹 边界层高度 莆田市 |
| 英文关键词: Ozone Cause of pollution Nighttime Backward trajectory Boundary layer height Putian |
| 基金项目:国家自然科学基金资助项目（No.U1405235）；华东区域气象科技协同创新基金资助项目（No.QYHZ201813）；福建省气象局开放式研究基金资助项目（No2019KX04）；莆田市科技计划基金资助项目（2021SJGY001） |
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| 中文摘要: |
| 基于2016—2020年莆田市监测站O3逐小时质量浓度观测资料和边界层高度数据，分析5年间4次夜间O3质量浓度超标的过程。沿海各市的O3数据、后向轨迹和MEIC污染排放清单表明，O3污染前体物来源于长三角地区和福州地区。4次夜间O3污染期间，O3与NOx整体相关性小，相关系数为0.23，外来源输送导致出现O3与NOx整体相关性较小的现象。4次夜间O3质量浓度超标成因是外来源输送的O3在夜间时段随着后向轨迹向本地区输送时，O3因缺少NO的滴定作用而无法分解，且垂直方向上边界层高度降低。 |
| 英文摘要: |
| Based on the hourly O3 mass concentration data and boundary layer height data from monitoring stations in Putian from 2016 to 2020， this paper studied four events of nighttime O3 mass concentration exceeding the standard over a period of 5 years. O3 concentration，backward trajectory and MEIC pollution emission inventory of coastal cities indicated that the precursors of O3 pollution originated from the Yangtze River Delta and Fuzhou regions. During the four nighttime O3 pollution periods，the overall correlation between O3 and NOx was poor，with a correlation coefficient of 0.23， due to the transportation of external sources. The reasons for nighttime O3 mass concentration exceeding the standard four times were when O3 from external sources was transported to the region along the backward trajectory during nighttime， O3 could not decompose due to the lack of NO titration， and the height of the boundary layer decreased in vertical direction. |
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