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

Heritage Science

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

Pollutant (µg m⁻³), I = indoor, O = outdoor. i = interpolated
	SO₂	NO_x	O₃	PM_2.5	PM_2.5		SO₂	NO_x	O₃	PM_2.5	PM_2.5
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	i	i	i	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