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Table 3 Pollution concentrations in the Oslo centre urban background, and indoors in the Oslo University Aula, used in the deposition modelling

From: Estimation of the historical dry deposition of air pollution indoors to the monumental paintings by Edvard Munch in the University Aula, in Oslo, Norway

Pollutant (µg m−3), I = indoor, O = outdoor. i = interpolated
  SO2 NOx O3 PM2.5 PM2.5   SO2 NOx O3 PM2.5 PM2.5
Year I I I I-low I-high Year I I I I-low I-high
1835 0.1 1.5 30 12 37 1985 2.7 52 13 4.6 9.2
1840–1875 i i i i i 1986 2.2 47 15 4.3 8.5
1875 2.7 3.8 29 27 85 1987 2.7 63 11 3.7 7.4
1880–1935 i i i i i 1988 2.0 51 14 2.6 5.2
1940 24 13 25 14 43 1989 1.4 46 15 3.7 7.4
1945 8.5 5.8 28 17 53 1990 1.0 37 17 3.4 6.8
1950–1955 i i i i i 1991 0.9 38 17 i i
1959 15 25 1992 1.0 43 16   
1960 28 46 15 14 23 1993 0.8 39 16   
1961 27 50 14 12 19 1994 0.8 41 16   
1962 32 52 13 12 19 1995 0.6 35 17 2.3 4.7
1963 45 74 10 13 20 1996 0.8 43 16 2.6 5.3
1964 33 58 12 10 16 1997 0.7 38 17 2.3 4.6
1965 26 49 14 i i 1998 0.7 35 17 2.1 4.3
1966 34 61 12 1999 0.7 33 18 2.0 4.0
1967 33 58 12 2000 0.6 30 19 1.9 3.8
1968 35 68 11 2001 i i i 2.1 4.2
1969 35 69 10 2002 0.4    i i
1970 38 77 9 2003–2004 i     
1971 28 81 9 2005 0.3     
1972 15 63 11 2006–2007 i     
1973 8.5 52 13 2008 0.5 35    
1974 8.2 43 15 2009 i 35    
1975 4.9 43 16 2010   36    
1976 6.4 53 13 2011 0.1 39    
1977 5.9 53 13 2012 i 30    
1978 5.3 52 14 2013   31    
1979 5.5 58 12 2014 1.0 23    
1980 4.0 48 14 4.1 8.2 2015 i 24    
1981 4.1 48 14 3.6 7.2 2016   26    
1982 3.3 43 15 4.3 8.6 2017 0.1 22    
1983 3.1 42 16 2.9 5.8 2018–2019 i i    
1984 2.4 41 16 2.3 4.5 2020 0.5 16 23 1.8 3.5