2017, Volume 3, Issue 2
Engineering >> 2017, Volume 3, Issue 2 doi: 10.1016/J.ENG.2017.01.009
Environmental and Dynamic Conditions for the Occurrence of Persistent Haze Events in North China
a National Climate Center, Beijing 100081, China
b Chinese Academy of Meteorological Sciences, Beijing 100081, China
c College of Atmospheric Science, Nanjing University of Information Science and Technology, Nanjing 210044, China
Next Previous
Abstract
This paper presents a concise summary of recent studies on the long-term variations of haze in North China and on the environmental and dynamic conditions for severe persistent haze events. Results indicate that haze days have an obviously rising trend over the past 50 years in North China. The occurrence frequency of persistent haze events has a similar rising trend due to the continuous rise of winter temperatures, decrease of surface wind speeds, and aggravation of atmospheric stability. In North China, when severe persistent haze events occur, anomalous southwesterly winds prevail in the lower troposphere, providing sufficient moisture for the formation of haze. Moreover, North China is mainly controlled by a deep downdraft in the mid-lower troposphere, which contributes to reducing the thickness of the planetary boundary layer, obviously reducing the atmospheric capacity for pollutants. This atmospheric circulation and sinking motion provide favorable conditions for the formation and maintenance of haze in North China.
Figures
Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
References
[ 1 ] Chan CK, Yao X. Air pollution in mega cities in China. Atmos Environ 2008;42(1):1–42 link1
[ 2 ] Wu D, Wu X, Li F, Tan H, Chen J, Cao Z, et al.Temporal and spatial variation of haze during 1951–2005 in Chinese mainland. Acta Meteorol Sinica 2010;68(5):680–8. Chinese.
[ 3 ] Ding Y, Liu Y. Analysis of long-term variations of fog and haze in China in the recent 50 years and their relations with atmospheric humidity. Sci China Earth Sci 2014;57(1):36–46 link1 link2
[ 4 ] Wang Y, Zhang J, Wang L, Hu B, Tang G, Liu Z, et al.Researching significance, status and expectation of haze in Beijing-Tianjin-Hebei region. Adv Earth Sci 2014;29(3):388–96. Chinese.
[ 5 ] Hu Y. Temporal variability and spatial distribution of haze in China and its association with climate change [dissertation].Lanzhou: Lanzhou University; 2009. Chinese.
[ 6 ] Zhang P, Guan Z, Shao P, Jiang Y, He J. Interdecadal changes in wintertime hazy days in Jiangsu Province and their association with circulation anomalies and regional warming trends. J Trop Meteorol 2015;31(1):103–11. Chinese.
[ 7 ] Wu P, Ding Y, Liu Y, Li X. Influence of the East Asia winter monsoon and atmospheric humidity on the wintertime haze frequency over central-eastern China. Acta Meteorol Sinica 2016;74(3):352–66. Chinese.
[ 8 ] Flocas H, Kelessis A, Helmis C, Petrakakis M, Zoumakis M, Pappas K. Synoptic and local scale atmospheric circulation associated with air pollution episodes in an urban Mediterranean area. Theor Appl Climatol 2009;95(3):265–77 link1
[ 9 ] Wang L, Zhang N, Liu Z, Sun Y, Ji D, Wang Y. The influence of climate factors, meteorological conditions, and boundary-layer structure on severe haze pollution in the Beijing-Tianjin-Hebei region during January 2013. Adv Meteorol 2014;2014(7):1–14 link1
[10] Zhao X, Zhao P, Xu J, Meng W, Pu W, Dong F, et al.Analysis of a winter regional haze event and its formation mechanism in the North China Plain. Atmos Chem Phys 2013;13(11):5685–96 link1
[11] Song L, Gao R, Li Y, Wang G. Analysis of China’s haze days in the winter half-year and the climatic background during 1961–2012. Adv Climate Change Res 2014;5(1):1–6 link1
[12] Zhang R, Li Q, Zhang R. Meteorological conditions for the persistent severe fog and haze events over eastern China in January 2013. Sci China Earth Sci 2014;57(1):26–35 link1
[13] Fu G, Xu W, Yang R, Li J, Zhao C. The distribution and trends of fog and haze in the North China Plain over the past 30 years. Atmos Chem Phys 2014;14(21):11949–58 link1
[14] Wu P, Ding YH, Liu Y. Atmospheric circulation and dynamic mechanism for persistent haze events in the Beijing-Tianjin-Hebei region. Adv Atmos Sci 2017;34(4):429–40 link1
[15] Zhang Y, Zhang P, Wang J, Qu E, Liu Q, Li G. Climatic characteristics of persistent haze events over Jingjinji during 1981–2013. Meteorol Mon 2015;40(3):311–8. Chinese.
[16] Chen H, Wang H. Haze days in North China and the associated atmospheric circulations based on daily visibility data from 1960 to 2012. J Geophys Res─Atmos 2015;120(12):5895–909 link1
[17] Quan J, Gao Y, Zhang Q, Tie X, Cao J, Han S, et al.Evolution of planetary boundary layer under different weather conditions, and its impact on aerosol concentrations. Particuology 2013;11(1):34–40 link1
京公网安备 11010502051620号
