ANALYSIS ON METEOROLOGICAL CONDITION AND CHARACTERISTICS OF A SEVERE HAZE POLLUTION IN XI'AN CHINA

Transcription

1 104 Environmental Engineering * PM 2. 5 T WD WS RH p VIS PM μg /m km PM 2. 5 /PM 10 64% ~ 80% r r = r = km - 1 DOI /j. hjgc ANALYSIS ON METEOROLOGICAL CONDITION AND CHARACTERISTICS OF A SEVERE HAZE POLLUTION IN XI'AN CHINA LIANG Jun-ning 1 2 GAO Min 1 2 WANG Shan 3 1. Shaanxi Provincial Academy of Environmental Science Xi an China 2. Shaanxi Engineering Technology Research Center of Pollution Reduction Xi an China 3. Xi an Meteorological Bureau Xi an China Abstract In order to understand the effect of weather conditions on the haze pollution in Xi an. We used the hourly monitoring data of 13 stations and meteorological observation data such as temperature T wind speed WS wind direction WD relative humidity RH pressure P and visibility VIS to analyze the meteorological condition of a severe haze pollution which happened in Dec 16th ~ 26th 2013 in Xi an. The results showed that daily mean concentrations of PM 2. 5 reached 744 μg /m 3 nearly 10 times more than national standard value and the minimum visibility dropped to km. During the heavy haze pollution the proportion of PM 2. 5 of PM 10 was between 64% and 80%. High relative humidity low wind speed no dominant wind direction and stable atmosphere were the main meteorological factors of this sever haze pollution. The correlation coefficient between VIS and WS P was and respectively which showed significant positive correlation while the correlation coefficient of VIS and T was only indicated weak positive correlation. The relationship between VIS and RH showed significant negative correlation and the correlation coefficient was According to the calculation results the effect of fine particles on the visibility was very obvious and the correlation coefficient was The highest extinction coefficient of fine particulate was 9. 2 km - 1 in this haze process. Keywords haze fine particles meteorological conditions correlation coefficient extinction coefficient 0 * 2012KTZB

2 Air Pollution Control m /s mm 905 mm d h 12 U PM Fig. 1 Ambient monitoring stations distribution in Xi an PM 2. 5 PM Thermo Scientific d 26 β PM 10 PM PM 10 PM T WD WS RH p VIS SPSS18. 0 SigmaPlot OriginPro WHO N N E E 204 km 116 km USERPA EU 29 PM 2. 5 PM km 2 1 GB

3 106 Environmental Engineering 24 h 13 PM 2. 5 PM Table 1 1 Reference guidelines for ambient PM value μg /m 3 PM h PM h PM μg /m PM 2. 5 PM km 16 PM μg /m μg /m PM μg /m PM μg /m 3 PM 2. 5 Table 2 The daily mean value of PM 2. 5 in Xi an μg /m PM 2. 5 /PM 10 2 PM 2. 5 PM 10 PM 2. 5 PM 10 PM 2. 5 /PM % ~ 84. 5% 64% ~ 80% 16 PM 2. 5 /PM PM 2. 5 /PM 10 70% 24 PM 2. 5 /PM 10 31% Fig PM 2. 5 /PM 10 The variation of PM 2. 5 /PM 10 in a severe haze pollution in Xi'an

4 Air Pollution Control ~ ~ 3. 0 Cao 32 Chen m /s PM Table 3 PM 2. 5 n = 264 Correlations among visual range meteorological observables and PM 2. 5 mass n = 264 PM PM a b c PM PM Fig. 3 3 PM 2. 5 Variations of PM 2. 5 mass with the meteorological parameters in Xi an PM % 11. 4% 8. 3% 7% 13. 6% 3 PM PM 2. 5 PM % ~ 70% 50% ~ 60% 46% ~ 84% % ~ 84% 26 46% ~ 993 hpa

5 108 Environmental Engineering L v = /b 1 b = b r + b a + b p 2 b a = 3. 3 φ NO 2 3 L v km b km - 1 b r km - 1 b a km - 1 b p km - 1 φ NO b p 4 b p = L v φ NO PM 2. 5 PM PM 2. 5 PM Fig PM 2. 5 PM 2. 5 The relationship of atmospheric extinction coefficient and PM 2. 5 mass PM km μg /m μg /m PM 2. 5 /PM % ~ 84. 5% 64% PM 2. 5 PM Lighty J S Veranth J M Sarifim A F. Combustion aerosols Factors governing their size and composition and implication of human health J. International Journal of Air and Waste Manage Association Seung Shik Park Jan Kleissl David Harrison et al. Characteristics of PM 2. 5 episodes revealed by semi-continuous measurements at the baltimore supersite at ponca St J. Aerosol Science and Technology PM PM 2. 5 PM 10 J PM 2. 5 J PM PM J J

6 Air Pollution Control J J particle concentrations and size distributions in three parking garage J Indian haze Similar regional impacts on climate J. Geophysical J J visibilities for hazy days in the North China Plain J. Atmospheric Koschmieder H. Theorie der horizontalen Sichtw cete Bcetr J ljntb@ 163. com J Obaidullah M Dyakov I V Peeters L et al. Measurements of J. International Journal of Energy and Environment Patricia K Quinn Timothy S Bates. North American Asian and Research Letters Cao Junji Wang Qiyuan Chow J C et al. Impacts of aerosol compositions on visibility impairment in Xi' an China J. Atmospheric Environment Chen J Zhao C S Ma N et al. Chemistry and Physics J PhysAtmos A parameterization of low 櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅 92 5 Isaac Ray. Incineration Facility Employs Eet ESP Polution Control Technology to Meet New EPA Mact Mulit-pollutant Standards C Chikayuki Nagata Shiro Suzuki Kazuaki Miyake et al. Wet type ICESP VIII Proceedings Electrostatic Precipitator Technology for Industrial and Power 6. J Applications C ICESP XIII Proceedings John C Tverberg. Stainless steel in the brewery J. MBAA TQ 7. J ph J C M. 9. M J D WFGD R D @ 139. com