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Circulation weather type classification for air pollution over the Beijing-Tianjin-Hebei region during winter |
YANG Xu1, ZHANG Xiao-ling2,3, KANG Yan-zhen1, ZHANG Ying2, WANG Shi-gong1,2, LI Zi-ming4, LI Hao1 |
1. Key Laboratory of Arid Climate Change and Disaster of Reduction of Gansu Province, School of Atmospheric Science, Lanzhou University, Lanzhou 730000, China;
2. Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, School of Atmospheric Science, Chengdu University of Information Technology, Chengdu 610225, China;
3. Institute of Urban Meteorology, China Meteorological Administration, Beijing, 100089, China;
4. Environmental Meteorology Forecast Center of Beijing-Tianjin-Hebei, Beijing 10089, China |
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Abstract Circulation weather types were identified over the Beijing-Tianjin-Hebei (BTH) region during winter based on sea surface pressure fields from ERA-Interim reanalysis dataset from 2013 to 2015 using the PCT (principal component analysis in T-mode) method. The characteristics of air pollution associated with key meteorological parameters under different atmospheric conditions was analyzed using the corresponding time period of air pollution data and conventional meteorological observations. Also the causes of the occurrence of high pollution episodes and the characteristic weather features over the BTH region were investigated by analyzing typical data collected in the most polluted month. The results showed that there were nine main circulation types over the BTH region, i.e., non-polluted circulation types with high pressure to the front of the BTH region or to south of this region, and polluted circulation types with high pressure fields, the rear of high pressure, col pressure field or ahead of the cold front. Overall, the polluted circulation types were characterized by high relative humidity with weak winds, high stable energy and low maximum mixing depth, which reduced the possibility of dilution of pollutants from the local area, therefore, the observed averaged air quality index (AQI) values in most cities were above 150. Two heavy air pollution episodes occurred in February 2014 caused by the persistent high pressure fields which lasted for a few days. The evolution of the high pressure system led to strengthening of the northerly wind, which reduced the concentrations of pollution over north cities of the BTH, however, southerly winds carried air pollutants to make the concentration increase rapidly in the north cities of the BTH.
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Received: 30 November 2016
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[1] |
张莹,邵毅,王式功,等.北京市空气污染物对呼吸系统疾病门诊人数的影响[J]. 中国环境科学, 2014,34(9):2401-2407.
|
[2] |
郑山,王敏珍,王式功,等.大气污染物对兰州心脑血管疾病住院影响的病例交叉研究[J]. 中国环境科学, 2012,32(7):1182-1187.
|
[3] |
胡伟,魏复盛.空气污染对儿童及其父母呼吸系统健康的影响[J]. 中国环境科学, 2000,20(5):425-428.
|
[4] |
刘咸德,李军,赵越,等.北京地区大气颗粒物污染的风向因素研究[J]. 中国环境科学, 2010,30(1):1-6.
|
[5] |
杜荣光,齐冰,郭惠惠,等.杭州市大气逆温特征及对空气污染物浓度的影响[J]. 气象与环境学报, 2011,27(4):49-53.
|
[6] |
杜川利,唐晓,李星敏,等.城市边界层高度变化特征与颗粒物浓度影响分析[J]. 高原气象, 2014,33(5):1383-1392.
|
[7] |
唐宜西,张小玲,熊亚军,等.北京一次持续霾天气过程气象特征分析[J]. 气象与环境学报, 2013,29(5):12-19.
|
[8] |
廖晓农,张小玲,王迎春,等.北京地区冬夏季持续性雾-霾发生的环境气象条件对比分析[J]. 环境科学, 2014,35(6):2031-2044.
|
[9] |
李云婷,王占山,安欣欣,等.2015年"十一"期间北京市大气重污染过程分析[J]. 中国环境科学, 2016,36(11):3218-3226.
|
[10] |
孟燕军,程丛兰.影响北京大气污染物变化的地面天气形势分析[J]. 气象, 2002,28(4):42-47.
|
[11] |
戴竹君,刘端阳,王宏斌,等.江苏秋冬季重度霾的分型研究[J]. 气象学报, 2016,74(1):133-148.
|
[12] |
张晓勇,张裕芬,冯银厂,等.天气类型对天津大气PM10污染的影响分析[J]. 环境科学研究, 2010,23(9):1115-1121.
|
[13] |
Philipp A, Beck C, Huth R, et al. Development and comparison of circulation type classifications using the COST 733dataset and software[J]. International Journal of Climatology, 2016,36(7):2673-2691.
|
[14] |
Huth R. A circulation classification scheme applicable in GCM studies[J]. Theoretical & Applied Climatology, 2000,67(1/2):1-18.
|
[15] |
Richman M B. Obliquely rotated principal components:An improved meteorological map typing technique?[J]. Journal of Applied Meteorology, 1981,20(10):1145-1159.
|
[16] |
Huth R, Beck C, Philipp A, et al. Classifications of atmospheric circulation patterns[J]. Annals of the New York Academy of Sciences, 2008,1146(1):105-152.
|
[17] |
Zhang J P, Zhu T, Zhang Q H, et al. The impact of circulation patterns on regional transport pathways and air quality over Beijing and its surroundings[J]. Atmospheric Chemistry & Physics & Discussions, 2012,11(12):33465-33509.
|
[18] |
Ye X, Song Y, Cai X, et al. Study on the synoptic flow patterns and boundary layer process of the severe haze events over the North China Plain in January 2013[J]. Atmospheric Environment, 2016,124:129-145.
|
[19] |
陈媛,岑况, Norra S,等.北京市区大气气溶胶PM2.5污染特征及颗粒物溯源与追踪分析[J]. 现代地质, 2010,24(2):345-354.
|
[20] |
尚可政,王式功,杨德保,等.兰州城区稳定能量及其与空气污染的关系[J]. 高原气象, 2001,20(1):76-81.
|
[21] |
王式功,姜大膀,杨德保,等.兰州市区最大混合层厚度变化特征分析[J]. 高原气象, 2000,19(3):363-37.
|
|
|
|