| 基于WRF-CMAQ/ISAM模型的榆林市夏季O3来源解析 |
| 摘要点击 1527 全文点击 444 投稿时间：2022-07-01 修订日期：2022-09-06 |
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| 中文关键词 臭氧(O3) 挥发性有机化合物(VOCs) 来源解析 CMAQ-ISAM模型 榆林市 |
| 英文关键词 ozone (O3) volatile organic compounds (VOCs) source analysis CMAQ-ISAM model Yulin City |
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| 中文摘要 |
| 为了更清楚地了解榆林市夏季臭氧污染来源，提出科学的治理建议，利用WRF-CMAQ模型对2019年7月榆林市和周边地区（包含太原市、西安市、银川市和呼和浩特市等省会城市）的O3浓度进行模拟；利用ISAM模块，对榆林市一次重污染过程的O3和其前体物NOx、VOCs来源进行量化.结果表明，重污染日榆林市的O3主要来自模拟区域外的远距离传输（55.5%），其次是模拟区域内前体物的光化学反应生成（20.6%，榆林市、山西省、内蒙古自治区和陕西省依次为10.0%、5.0%、2.3%和2.1%，甘肃省、宁夏回族自治区和河南省合计为1.2%）和初始条件（0.3%），剩余来源（23.6%）未能被成功标记；榆林市处于VOCs控制区，其VOCs由烷烃（76.5%）、酮类（9.2%）和其它种类的VOCs （14.3%）构成，VOCs来源有模拟区域内的污染源排放（45.6%，榆林市、山西省、内蒙古自治区和陕西省依次为22.0%、11.4%、6.3%和5.1%，甘肃省、宁夏回族自治区和河南省合计为0.8%）和模拟区域外的远距离传输（27.9%），剩余26.5%未被成功标记.研究表明，治理榆林市O3污染，不仅要对本地VOCs排放加以控制，也应做好外围周边地区VOCs排放的统筹规划. |
| 英文摘要 |
| In order to have a clearer understanding of the sources of ozone pollution in Yulin City in summer and put forward scientific governance suggestions, the WRF-CMAQ model was used to simulate the O3 concentration in Yulin City and surrounding areas (including Taiyuan City, Xi'an City, Yinchuan City, Hohhot City, and other provincial capital cities) in July 2019. Using the ISAM module, the sources of O3 and its precursors NOx and VOCs in a heavy pollution process in Yulin City were quantified. The results showed that on heavy pollution days, the O3 in Yulin City mainly came from the long-distance transmission outside the simulation area (55.5%), followed by the photochemical reaction of precursors in the simulation area (20.6%, 10.0%, 5.0%, 2.3%, and 2.1%, respectively, in Yulin City, Shanxi Province, Inner Mongolia Autonomous Region, and Shaanxi Province, 1.2% in Gansu Province, Ningxia Hui Autonomous Region, and Henan Province in total), and initial conditions (0.3%); the remaining sources (23.6%) could not be successfully labeled. Yulin City is in the VOCs control area, and its VOCs were composed of paraffin (76.5%), ketones (9.2%), and other types of VOCs (14.3%). The VOCs came from the emission of pollution sources in the simulation area (45.6%, 22.0%, 11.4%, 6.3%, and 5.1%, respectively, in Yulin City, Shanxi Province, Inner Mongolia Autonomous Region, and Shaanxi Province, 0.8% in Gansu Province, Ningxia Hui Autonomous Region, and Henan Province in total) and the long-distance transmission outside the simulation area (27.9%); the remaining 26.5% were not successfully marked. This research showed that to control the O3 pollution in Yulin, not only should the local VOCs emissions be controlled, but the overall planning of VOCs emissions in the peripheral areas should also be done well. |
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