基于WRF-CMAQ/ISAM模型的榆林市夏季O_(3)来源解析  

Analysis of O_(3) Sources in Yulin City in Summer Based on WRF-CMAQ/ISAM Model

作　　者：王伊凡 仝纪龙[1] 陈羽翔 林鑫 刘永乐 敖丛杰 刘浩天 WANG Yi-fan;TONG Ji-long;CHEN Yu-xiang;LIN Xin;LIU Yong-le;AO Cong-jie;LIU Hao-tian(College of Atmospheric Sciences,Lanzhou University,Lanzhou 730000,China)

机构地区：[1]兰州大学大气科学学院,兰州730000

出　　处：《环境科学》2023年第7期3676-3684,共9页Environmental Science

基　　金：国家自然科学基金项目(42075174)。

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NO_(x)、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.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 O_(3) 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 O_(3) and its precursors NO_(x) and VOCs in a heavy pollution process in Yulin City were quantified.The results showed that on heavy pollution days,the O_(3) 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 O_(3) 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.

关 键 词：臭氧(O_(3)) 挥发性有机化合物(VOCs) 来源解析 CMAQ-ISAM模型 榆林市 

分 类 号：X515[环境科学与工程—环境工程]