2015—2020年中国臭氧污染时空演化及其与厄尔尼诺-南方涛动的关系研究  

Spatial-Temporal Evolution of Ozone Pollution and Its Relationship with El Nino-Southern Oscillation in China from 2015 to 2020

作　　者：杨艺科 王晓红[1] 凌元锦 陆庆恒 秦靖蒿 李晓艺 于乐江[2] YANG Yike;WANG Xiaohong;LING Yuanjin;LU Qingheng;QIN Jinghao;LI Xiaoyi;YU Lejiang(College of Environment and Safety Engineering,Qingdao University of Science and Technology,Qingdao 266042,China;State Oceanic Administration Key Laboratory for Polar Science,Polar Research Institute of China,Shanghai 200136,China)

机构地区：[1]青岛科技大学环境与安全工程学院,山东青岛266042 [2]中国极地研究中心,自然资源部极地科学重点实验室,上海200136

出　　处：《环境科学研究》2023年第5期895-903,共9页Research of Environmental Sciences

基　　金：山东省自然科学基金项目(No.ZR2020MD016)。

摘　　要：为研究2015—2020年我国近地面臭氧(O_(3))污染时空演化特征以及厄尔尼诺-南方涛动(ENSO)对我国O_(3)污染的影响,本文基于2015—2020年我国近1500个监测站点的O_(3)浓度数据(不包括港澳台地区数据),综合运用空间自相关、热点分析、异常值分析及回归分析,研究2015—2020年我国O_(3)污染的时空演化、浓度异常特征及其与ENSO事件和气象因素的关系.结果表明:(1)2015—2019年我国O_(3)污染集聚效应不断增强,但2020年显著降低.(2)我国O_(3)浓度呈先升高(2015—2018年)后下降(2018—2020年)的特征,2017年、2018年O_(3)年均浓度分别较上一年升高8.72%、1.76%,2019年、2020年O_(3)年均浓度分别较上一年下降3.60%、3.66%.除2019年、2020年外,O_(3)浓度高值聚集区站点的O_(3)浓度峰值和高值天数(日均值大于120μg/m^(3)的天数)均大于O_(3)浓度低值聚集区站点.(3)O_(3)高浓度时期为每年的4—10月.O_(3)高浓度区域春、夏两季以华北为核心,秋季向华南和东南地区转移.(4)回归分析表明,我国O_(3)浓度正异常与ENSO负相拉尼娜相关,O_(3)浓度负异常与ENSO正相厄尔尼诺相关.我国东南部O_(3)浓度异常主要受ENSO期间太阳辐射异常和降水异常的影响,而西部和北部地区O_(3)浓度异常主要受ENSO期间风速异常的影响.研究显示,2015—2020年我国O_(3)平均浓度呈先升高后降低的变化趋势,O_(3)高浓度时期以春、夏两季为主,O_(3)高浓度区域随季节而发生变化,且不同区域O_(3)污染变化特征不同,ENSO对我国不同区域O_(3)污染的影响机制不同.To study the spatiotemporal evolution characteristics of near-surface ozone(O_(3))pollution in China from 2015 to 2020 and the effects of El Nino southern Oscillation(ENSO)on it,the temporal and spatial characteristics of O_(3) pollution and its relationship with ENSO and meteorological factors were investigated based on O_(3) observed data from nearly 1500 monitoring stations in China from 2015 to 2020 using spatial autocorrelation,hot spot analysis,anomalies analysis,and regression analysis.The result shows that:(1)The agglomeration effect of O_(3) pollution first intensified from 2015 to 2019,and then dramatically weakened in 2020.(2)The national average O_(3) concentration first increased from 2015 to 2018,and then decreased from 2018 to 2020.Compared with the previous year,the annual average O_(3) concentration increased by 8.72% and 1.76% in 2017 and 2018,respectively.It decreased by 3.60% and 3.66% in 2019 and 2020,respectively.In addition,the maximum peak and high-value(daily average value greater than 120μg/m^(3))days of O_(3) concentration in the high O_(3) concentration aggregated area were higher than those in the low O_(3) concentration aggregated area,except for 2019 and 2020.(3)In the case of seasonal variations,high O_(3) concentration typically lasted from April to October each year.In spring and summer,the high O_(3) concentration area was concentrated in North China,but in autumn,the center gradually shifted to South and southeast China.(4)It was demonstrated that there was a relationship between the positive anomaly of O_(3) concentration and the ENSO negative phase La Nina,and the negative anomaly of O_(3) concentration and the ENSO positive phase El Nino.The ENSO-related solar radiation and precipitation anomalies primarily affect the O_(3) concentration anomaly in southeast China,while the ENSO-related wind speed anomaly primarily affects the O_(3) concentration anomaly in western and northern China.The study shows that from 2015 to 2020 the national average O_(3) concentration first incre

关 键 词：臭氧(O_(3)) 时空演化 浓度异常 回归 厄尔尼诺-南方涛动(ENSO) 

分 类 号：X513[环境科学与工程—环境工程]