Influence of Mountain Valley Breeze and Sea Land Breeze in Winter on Distribution of Air Pollutants in Beijing-Tianjin-Hebei Region

被引：0

作者：

Li Q.-C. ^{[1
]}

Li J. ^{[1
]}

Zheng Z.-F. ^{[1
]}

Wang Y.-T. ^{[1
]}

Yu M. ^{[1
]}

机构：

[1] Institute of Urban Meteorology, China Meteorological Administration, Beijing

来源：

Huanjing Kexue/Environmental Science | 2019年 / 40卷 / 02期

关键词：

Air pollution; Convergence line; Mountain valley breeze(MVB); Sea land breeze(SLB); Transportation and aggregation of air pollutants;

D O I：

10.13227/j.hjkx.201803193

中图分类号：

学科分类号：

摘要：

To reveal the effect of Mountain Valley Breeze (MVB) and Sea Land Breeze (SLB) in winter on the spatial-temporal distribution of air pollutants in the Beijing-Tianjin-Hebei region, hourly data from Automatic Weather Stations (AWS) and hourly air pollutant concentration data in December 2016 from the China National Environmental Monitoring Center were used to calculate the average wind vector fields and PM 2.5 concentration fields. The change rule of MVB and SLB and its influence on the distribution of PM 2.5 concentration were analyzed. The prevailing factor for the MVB days was the southerly wind (valley wind) in the Beijing-Tianjin-Hebei region from noon to afternoon, this valley wind transports air pollutants from the eastern areas of the Taihang Mountains and southwestern areas of Beijing northward. In the evening, "herringbone" convergence lines formed between the emerging mountain breeze in the western and northern parts of Beijing, as well as in the piedmont areas of the Taihang Mountains, and the southerly wind. The PM 2.5 concentration increased in Beijing, Langfang, Baoding, Shijiazhuang, and Xingtai according to the concentration of the convergence lines. For the SLB days, the PM 2.5 concentration increased in the piedmont areas of the Taihang Mountains due to the influence of valley wind from noon to afternoon. For the MVB days, from noon until midnight, the sea breeze appeared in the eastern coastal areas and reached the southeastern part of Tianjin, the PM 2.5 concentration increased towards the front of the sea breeze. The influence of MVB and SLB on the distribution of air pollutants in the heavy pollutions process were surveyed by analyzing the temporal variation relationship between the vertical distribution of wind over 0-325 m tower (at the Institute of Atmospheric Physics) and PM 2.5 concentration of urban area, and by using the Cressman method to interpolate the 10 m wind data and PM 2.5 concentration data to 2D grid field. From noon to afternoon, the air pollutants were blown to Beijing by valley wind. In the evening, the air pollutants converged near the convergence lines, which were formed by the mountain breeze and southerly wind. The severe pollution zone formed in the plains of Beijing and south of Beijing. From midnight to early morning, the air pollutants in Beijing were gradually blown away by the mountain breeze and stayed south of Beijing and northwest of Tianjin. In the winter, the effect of MVB on the recycling and accumulation of air pollutants plays an important role in severe atmospheric pollution incidents in Beijing, south of Beijing, and the eastern areas of the Taihang Mountains. © 2019, Science Press. All right reserved.

引用

页码：513 / 524

页数：11

共 24 条

[1] Guo J.Y., Zhang Y.J., Zheng H.T., Et al., Characteristics of spatial distribution and variations of atmospheric fine particles in Beijing in 2015, Acta Scientiae Circumstantiae, 37, 7, pp. 2409-2419, (2017)
[2] Liao X.N., Zhang X.L., Wang Y.C., Et al., Comparative analysis on meteorological condition for persistent haze cases in summer and winter in Beijing, Environmental Science, 35, 6, pp. 2031-2044, (2014)
[3] Reeves H.D., Stensrud D.J., Synoptic-scale flow and valley cold pool evolution in the western United States, Weather and Forecasting, 24, 6, pp. 1625-1643, (2009)
[4] Silcox G.D., Kelly K.E., Crosman E.T., Et al., Wintertime PM <sub>2.5</sub> concentrations during persistent, multi-day cold-air pools in a mountain valley , Atmospheric Environment, 46, pp. 17-24, (2012)
[5] Curci G., Cinque G., Tuccella P., Et al., Modelling air quality impact of a biomass energy power plant in a mountain valley in central Italy, Atmospheric Environment, 62, pp. 248-255, (2012)
[6] Wu D., Liao B.T., Wu M., Et al., The long-term trend of haze and fog days and the surface layer transport conditions under haze weather in North China, Acta Scientiae Circumstantiae, 34, 1, pp. 1-11, (2014)
[7] You C.H., Cai X.H., Song Y., Et al., Local atmospheric circulations over Beijing-Tianjin area in summer, Acta Scientiarum Naturalium Universitatis Pekinensis, 42, 6, pp. 779-783, (2006)
[8] Liu S.H., Liu Z.X., Li J., Et al., Numerical simulation for the coupling effect of local atmospheric circulations over the area of Beijing, Tianjin and Hebei Province, Science in China Series D: Earth Sciences, 52, 3, pp. 382-392, (2009)
[9] Yang Y., Tang G.Q., Ji D.S., Et al., 2015, Effects of local circulation on atmospheric pollutants in Beijing-Tianjin-Hebei region during summer, Chinese Journal of Environmental Engineering, 9, 5, pp. 2359-2367, (2015)
[10] Zhu C.J., Ye Z.J., Duan B.Z., Et al., Characteristics of local circulation and aerosol distribution over Beijing-Tianjin area during autumn and winter, Acta Scientiae Circumstantiae, 2, 4, pp. 342-350, (1982)

← 1 2 3 →