Analysis of visibility characteristics and connecting factors over the Yangtze River Delta Region during winter time
ZHOU Yi-ke1,2, ZHU Bin1,2, HAN Zhi-wei3, PAN Chen1,2, GUO Ting1,2, WEI Jian-su4, LIU Duan-yang4
1. Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing 210044, China;
2. Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing 210044, China;
3. Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China;
4. Meteorological Observatory of Jiangsu Province, Nanjing 210008, China
Based on the meteorological data from 28 observation stations in winter 2013 and 2014, NCEP FNL reanalysis data and ground PM2.5 observations, the characteristic of visibility and its relationship with air pollutants and meteorological conditions in the Yangtze River Delta in winter were analyzed. In winter 2013, the frequency of haze day was 53.4%. 81.6% of the visibility change can be explained by PM2.5 concentration, 10m wind speed, wind shear (500~850hPa), relative humidity, temperature difference (925~1000hPa), potential pseudo-equivalent temperature difference (850~925hPa). The effects of meteorological conditions and air pollutants on visibility were comparable, and the contribution of thermal factor was almost twice that of dynamical factor. The RH impact on visibility was stronger at lower PM2.5 concentration and higher RH (>70%). The visibility in winter 2014 was well reproduced by the nonlinear regression equation.
周奕珂, 朱彬, 韩志伟, 潘晨, 郭婷, 魏建苏, 刘端阳. 长江三角洲地区冬季能见度特征及影响因子分析[J]. 中国环境科学, 2016, 36(3): 660-669.
ZHOU Yi-ke, ZHU Bin, HAN Zhi-wei, PAN Chen, GUO Ting, WEI Jian-su, LIU Duan-yang. Analysis of visibility characteristics and connecting factors over the Yangtze River Delta Region during winter time. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(3): 660-669.
Charlson R J, Ahlquist N C, Horvath H. On the generality of correlation of atmospheric aerosol mass concentration and light scatter[J]. Atmospheric Environment (1967), 1968,2(5):455-464.
[5]
Noll K E, Mueller P K, Imada M. Visibility and aerosol concentration in urban air[J]. Atmospheric Environment (1967), 1968,2(5):465-475.
[6]
Charlson R J. Atmospheric visibility related to aerosol mass concentration: review[J]. Environmental Science & Technology, 1969,3(10):913-918.
[7]
Horvath H, Noll K E. The relationship between atmospheric light scattering coefficient and visibility[J]. Atmospheric Environment (1967), 1969,3(5):543-550.
[8]
Miller M E, Canfield N L, Ritter T A, et al. Visibility changes in Ohio, Kentucky, and Tennessee from 1962 to 1969[J]. Monthly Weather Review, 1972,100(1):67-71.
[9]
Stuart Naegele P, William D Sellers. A Study of Visibility in Eighteen Cities in the Western and Southwestern United States[J]. Mon. Wea. Rev., 1981,109:2394-2399.
[10]
Lee D O. Trends in summer visibility in London and southern England 1962~1979[J]. Atmospheric Environment (1967), 1983, 17(1):151-159.
[11]
Lee D O. The choice of visibility statistics in the analysis of long term visibility trends in southern England[J]. Weather, 1988,43: 332-338.
[12]
Lee D O. The influence of wind direction, circulation type and air pollution emissions on summer visibility trends in southern England[J]. Atmospheric Environment. Part A. General Topics, 1990,24(1):195-201.
[13]
Hand J L, Malm W C. Review of the IMPROVE equation for estimating ambient light extinction coefficients[M]. CIRA, Colorado State University, 2007.
Day D E, Malm W C. Aerosol light scattering measurements as a function of relative humidity: a comparison between measurements made at three different sites[J]. Atmospheric Environment, 2001,35(30):5169-5176.
Kang H, Zhu B, Su J, et al. Analysis of a long-lasting haze episode in Nanjing, China[J]. Atmospheric Research, 2013,120: 78-87.
[22]
Zhao X J, Zhao P S, Xu J, et al. Analysis of a winter regional haze event and its formation mechanism in the North China Plain[J]. Atmospheric Chemistry and Physics, 2013,13(11):5685-5696.
Mang L, et al. Regression Analyses between Recent Air Quality and Visibility Changes in Megacities at Four Haze Regions in China[J]. Aerosol and Air Quality Research, 2012,12:1049-1061
Griffing G W. Relationships between the prevailing visibility, nephelometer scattering coefficient, and sunphotometer turbidity coefficient[J]. Atmospheric Environment, 1980,14(5):577-584.
[33]
Ozkaynak H, Schatz A D, Thurston G D, et al. Relationships between aerosol extinction coefficients derived from airport visual range observations and alternative measure of air-borne particle mass[J]. Air Pollution Control Association, 1985,35: 1176-1185.
[34]
Che H, Zhang X, Li Y, et al. Horizontal visibility trends in China 1981~2005[J]. Geophysical Research Letters, 2007,34(24): L24706.
Liu X, Xie X, Yin Z Y, et al. A modeling study of the effects of aerosols on clouds and precipitation over East Asia[J]. Theoretical and applied climatology, 2011,106(3/4):343-354.