Fig 1 Observation stations distribution in China (Bext values are multiplied by 1000
in the legend)
Fig 2 The division of sub-regions in China mainland
Table 1 Visibility time series and seasonal patterns for the selected sites
Eastern China
Location
HungQia
Lishui
Nanjing
Time series
Seasonal pattern
1973-1980
Seasonal pattern
1973-1980
Seasonal pattern
1973-1980
Seasonal pattern
1973-1980
Continue Table 1
South coastal area
Xiamen
Xinyi
Shenzhen
Continue Table 1
Southwestern China
Kunming
Guiyang
Mengla
Continue Table 1
Central China
Taiyuan
Nanyang
Changde
Continue Table 1
Bay area
Dalian
Tsingtao
Continue Table 1
Northeastern China
Shenyang
Changchun
Mohe
Continue Table 1
Northern and Northwestern China
Lanzhou
Abag qi
Tikanlik
Continue Table 1
Sichuan Basin
Chongqing
a
b
c
d
x
a
a
Figure 3 Visibility distribution over eastern and central China
(a: 1973-1980 summer; b: 1973-1980 winter; c: 2000-2005 summer; d: 2000-2005
winter)
a
b
c
d
Fig 4 The spatial distribution of aerosol optical depth in central and eastern China
(a: spring; b: summer; c: fall; d: winter)
Fig 5 Topographical map of central and eastern China
Fig 6 The comparison of visibility between Shijiazhuang(blue) and Zhangjiakou(red)
Fig 7 The comparison of visibility between Shijiazhuang(red) and Xingtai (blue)
Fig 8 The comparison of visibility between Xi’an (red) and Taiyuan (blue)
Fig 9 The comparison of visibility between Zhengzhou (red) and Xi’an (blue)
Fig 10 The comparison of visibility between Shijiazhuang (red) and Taiyuan (blue)