Spatial and temporal distribution characteristic of fog days and haze days from 1960~2012 and impact factors over the Yangtze River Delta Region
GUO Ting1, ZHU Bin1, KANG Zhi-ming2, GUI Hai-ling3, KANG Han-qing1
1. Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing 210044, China;
2. Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing 210044, China;
3. National Meteorological Centre, Beijing 100081, China
Spatial and temporal distribution characteristics of Fog days and haze days and connecting factors have been analysed by applying meteorological data from 42 surface weather stations in the Yangtze River Delta region from 1960 to 2012. Results show that:In terms of spatial distribution, the major fog values are distributed in east coastal area of Yancheng city, Huangshan mountain and east coastal area of Zhejiang, while the major haze values are distributed in Nanjing, Hangzhou, Hefei, Quzhou, together with other surrounding cities. In terms of temporal distribution, the annual fog days in large cities has increased since the 1960s but discreased in 1980s; the fog days at small cities has a time lag compared to the evolution at the large cities. Monthly variation of fog days for the large cities appeared with high frequency in winter and spring while less and least in autumn and summer, Monthly variation of fog days for the small cities displayed bimodal trend, with more fog days in spring and winter. Average number of haze days at large cities and small cities depicted a increasing trend, and the differences in the number of haze days for large and small cities had been widening after 1990s. The rising temperature caused by regional climate change and urbanization and the high aerosol abundance caused by heavy air pollution led to the major reason of the different variation characteristics of haze days and fog days in Yangtze River Delta region. However, due to the complicated interaction between each influencing factors, intensive investigation is still required for further study.
郭婷, 朱彬, 康志明, 桂海林, 康汉青. 1960~2012年长江三角洲地区雾日与霾日的气候特征及其影响因素[J]. 中国环境科学, 2016, 36(4): 961-969.
GUO Ting, ZHU Bin, KANG Zhi-ming, GUI Hai-ling, KANG Han-qing. Spatial and temporal distribution characteristic of fog days and haze days from 1960~2012 and impact factors over the Yangtze River Delta Region. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(4): 961-969.
Delfino R J, Gong Jr H, W S L, et al. Asthma symptoms in Hispanic children and daily ambient exposures to toxic and criteria air pollutants. Environ. Health Persp, 2003,111:649-656.
[4]
Schichtel B A., Husar R B, Falke S R, et al. Haze trends over the United States, 1980~1995[J]. Atmospheric Environment, 2001,35(30):5205-5210.
[5]
Robert Vautard, Pascal Yiou, Greet Jan van Oldenborgh. Decline of fog mist and haze in Europe over the 30 years[J]. Nature Geoscience, 2009,2:115-119.
[6]
Martin Doyle, Stephem Dorling. Visibility trends in the UK 1950~1997[J]. Atmospheric Environment, 2002,36:3161-3172.
[7]
Zhang X Y, Wang Y O, Niu, et al. Atmospheric aerosol compositions in China:spatial/temporal variability, chemical signature, regional haze distribution and comparisons with global aerosols[J]. Atmospheric Chemistry and Physics, 2012,12(2):779-799.
Quan J, Zhang Q, He H, et al. Analysis of the formation of fog and haze in North China Plain[J]. Atmosphere Chemistry and Physics, 2011,11:8205-8214.
[12]
Shi Chune, MattisaRoth, ZhangHao, et al. Impacts of urbanization on long~term fog variation in Anhui Province China[J]. Atmosphere Environment, 2008,42:8484-8492.
WU D, TIE X X, LI C C, et al. An extremely low visibility event over the Guangzhou region:A case study[J]. Atmospheric Environment, 2005,39(35):6568-6577.
Fu F G, Xu W F, Rong R F, et al. The distribution and trends of fog and haze in the North China Plain over the past 30 years[J]. Atmosphere Chemistry and Physics, 2014,14:16123-16149.
Du Y, Xie Z, Zeng Y, et al. Impact of urban expansion on regional temperature change in the Yangtze River Delta[J]. Journal of Geographical Sciences, 2007,17(4):387-398.