不同天气型下影响胶东经济圈臭氧污染的关键天气因子及来源分析  

Analysis of key factors and sources of ozone pollution in Jiaodong Economic Circle under different weather patterns

作　　者：于慧珍 马艳 郭丽娜 郭飞燕 孟赫 黄容 YU Hui-zhen;MA Yan;GUO Li-na;GUO Fei-yan;MENG He;HUANG Rong(Qingdao Meteorological Bureau,Qingdao 266003,China;Qingdao Eco-environment Monitoring Center of Shandong Province,Qingdao 266003,China)

机构地区：[1]青岛市气象局,山东青岛266003 [2]山东省青岛生态环境监测中心,山东青岛266003

出　　处：《中国环境科学》2024年第1期48-57,共10页China Environmental Science

基　　金：山东省自然科学基金面上项目(ZR2021MD116)。

摘　　要：基于2014~2021年臭氧实况和再分析资料研究不同天气型下影响胶东经济圈臭氧污染的关键天气因子以及气流来源.结果显示容易出现臭氧污染的天气形势主要有4类,高空均为西风槽后西北气流控制,地面分别对应东北低压槽、弱反气旋、海上高压后部和大陆高压控制,4类天气型下臭氧污染日数分别占比58%、28%、6%和5%.不同天气型下影响臭氧的关键天气要素不同,东北低压槽型的关键因子是太阳辐射、云量以及低层相对湿度;弱反气旋型主要与太阳辐射、云量、低层湿度和低层纬向风相关;海上高压后部型主要与太阳辐射、云量、低层温度和低层湿度相关;大陆高压型主要与低层温度、低层经向风和大气稳定度相关.后向轨迹聚类分析显示,是否发生臭氧污染与气流来源的纬度或是否来源于内陆有关,胶东经济圈臭氧污染主要受山东省、安徽省、江苏省以及东南近海的影响.一次连续臭氧污染过程分析显示,当高空受西风槽后西北气流或高压脊控制,低层受内陆西北或西南气流影响时,有利于胶东经济圈臭氧污染的发生和持续.The key factors and sources of ozone pollution in Jiaodong Economic Circle under different weather patterns were studied based on the ozone observation and reanalysis data from 2014 to 2021.Results show that there are four types of weather patterns which are prone to ozone pollution.In the four weather patterns,the upper level is all controlled by the northwesterlies behind the westerly trough,while the surface is dominated by low-pressure trough in the northeastern China,weak anticyclone,rear of offshore high-pressure,and continental high-pressure.The number of ozone pollution days under the four weather types accounted for 58%,28%,6%and 5%of the total ozone pollution days,respectively.The key factors affecting ozone pollution are different under different weather patterns.For the northeast low-pressure trough type,the key factors are associated with the solar radiation,cloud fraction and low-level relative humidity.For the weak anticyclone type,the ozone is mainly correlated with solar radiation,cloud fraction,low-level relative humidity and zonal winds.For the rear of offshore high-pressure type,the ozone is mainly associated with solar radiation,cloud fraction,low-level temperature and relative humidity.For the continental high-pressure type,the ozone is mainly related to low-level temperature,low-level meridional wind and atmospheric stability.Backward trajectory cluster analysis shows that the occurring of ozone pollution is related to the latitude of the source of the air flow or whether it comes from inland.The ozone pollution in Jiaodong Economic Circle mainly comes from the Shandong Province,Anhui Province,Jiangsu Province and southeastern coastal China.The analysis of a long-lasting ozone pollution process shows that it is favorable for the occurrence and long duration of ozone pollution in the Jiaodong Economic Circle when the weather pattern is controlled by the northwesterly wind behind the trough or high-pressure ridge in the upper level,and by the inland northwesterly or southwesterly flow in the

关 键 词：臭氧污染 客观分型 关键因子 后向轨迹聚类 

分 类 号：X515[环境科学与工程—环境工程]