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作 者:马庚雪 李钢[2] 刘艳杰 齐浩 Ma Gengxue;Li Gang;Liu Yanjie;Qi Hao(Beichen Meteorological Observatory of Tianjin,Tianjin 300400,China;Tianjin Meteorological Observatory,Tianjin 300074,China;Langfang Meteorological Observatory of Hebei Province,Langfang 065000,China)
机构地区:[1]天津市北辰区气象局,天津300400 [2]天津市气象台,天津300074 [3]河北省廊坊市气象台,河北廊坊065000
出 处:《环境科学与管理》2023年第11期57-62,共6页Environmental Science and Management
摘 要:文章研究了2014年-2021年天津地区空气质量指数(Air Quality Index, AQI)的时空分布特征,发现天津地区污染情况逐年好转,但臭氧污染逐年加重。季节变化特征为冬季最重,夏季最轻。日变化特征为臭氧浓度在午后最为严重,其余污染物则在早晚高峰时段污染严重。在各污染物中,PM_(2.5)的空气质量分指数与AQI分布最为相似,对空气污染贡献最大。AQI的空间分布表明,冬季西南内陆地区污染最重,春季和秋季中南部地区污染程度更高。运用经验正交分解法(Empirical Orthogonal Fuction, EOF)分析AQI距平场,发现前三个模态累计方差贡献为56.6%,且通过检验,体现了天津空气污染分布的南北差异、东西差异和区域性生产活动的影响。This paper studies the temporal and spatial distribution characteristics of air quality index(AQI)in Tianjin from 2014 to 2021.It finds that the pollution situation in Tianjin is getting better year by year,but the ozone pollution is getting worse year by year.The seasonal variation characteristics indicate that the degree of air pollution is the heaviest in winter and the lightest in summer.The daily variation characteristics indicate that ozone concentration is most severe in the afternoon.The other pollutants are heavily polluted during peak hours in the morning and evening.Among all pollutants,PM _(2.5) has the most similar distribution with AQI,and contributes the most to air pollution.The spatial distribution of AQI shows that the southwest inland areas are the most polluted in winter.In spring and autumn,the pollution level in the middle and southern areas is higher.The Empirical Orthogonal Fuction(EOF)method is used to analyze the AQI anomaly field.It is found that the cumulative variance contribution of the first three modes is 56.6%,and all of them pass the test.The three modes reflect the north-south difference,the east-west difference,and the influence of regional production activities in Tianjin air pollution distribution.
分 类 号:X16[环境科学与工程—环境科学]
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