Table 1 Mean and standard deviation (2001–2020) of PM2.5 concentrations (µg m−3) averaged by country

From: Large transboundary health impact of Arctic wildfire smoke

Country

Mean PM2.5

Population-weighted mean PM2.5

Total

Attributed to Arctic wildfires

Total

Attributed to Arctic wildfires

µg m−3

µg m−3

% of total

µg m-3

µg m−3

% of total

Russia

7.8 ± 0.9

1.8 ± 0.7

22.8 ± 7.0

14.7 ± 1.2

1.2 ± 0.4

8.2 ± 1.8

USA

7.3 ± 1.1

0.2 ± 0.1

3.3 ± 1.6

9.2 ± 1.7

0.1 ± 0.0

1.1 ± 0.4

Canada

4.1 ± 0.5

1.1 ± 0.4

27.1 ± 7.4

6.8 ± 0.8

0.6 ± 0.1

8.7 ± 2.2

Greenland

1.5 ± 0.1

0.1 ± 0.0

3.8 ± 1.2

1.1 ± 0.1

0.0 ± 0.0

3.5 ± 1.1

Iceland

4.8 ± 0.3

0.0 ± 0.0

0.9 ± 0.6

4.8 ± 0.3

0.0 ± 0.0

0.6 ± 0.6

Norway

5.1 ± 0.5

0.1 ± 0.0

2.0 ± 0.7

6.5 ± 0.8

0.1 ± 0.1

1.8 ± 0.7

Sweden

5.5 ± 0.6

0.1 ± 0.0

2.1 ± 0.7

6.7 ± 0.9

0.1 ± 0.0

1.1 ± 0.4

Finland

5.3 ± 0.7

0.1 ± 0.1

2.5 ± 1.2

6.4 ± 1.0

0.1 ± 0.1

1.5 ± 0.8

Mongolia

19.1 ± 1.5

1.1 ± 0.8

5.7 ± 3.6

37.5 ± 4.0

2.0 ± 1.2

5.3 ± 3.2

Belarus

16.2 ± 1.9

0.5 ± 0.3

2.8 ± 1.6

16.4 ± 1.9

0.5 ± 0.3

2.8 ± 1.6

Georgia

20.8 ± 1.3

0.5 ± 0.2

2.5 ± 1.0

20.5 ± 1.2

0.4 ± 0.2

1.8 ± 0.8

Estonia

9.2 ± 1.4

0.2 ± 0.1

2.2 ± 1.1

7.8 ± 1.3

0.2 ± 0.1

2.0 ± 1.1

Latvia

14.9 ± 1.9

0.3 ± 0.2

2.0 ± 1.0

14.3 ± 1.9

0.2 ± 0.1

1.5 ± 0.7

Japan

11.4 ± 1.1

0.2 ± 0.1

2.0 ± 1.0

12.1 ± 1.0

0.1 ± 0.1

0.8 ± 0.4

Lithuania

15.6 ± 1.9

0.3 ± 0.2

1.8 ± 1.0

15.0 ± 1.9

0.3 ± 0.2

1.9 ± 1.1

Moldova

18.1 ± 1.8

0.3 ± 0.2

1.8 ± 1.2

18.3 ± 1.8

0.4 ± 0.3

2.0 ± 1.3

China

32.2 ± 3.3

0.5 ± 0.3

1.5 ± 0.8

48.7 ± 6.6

0.2 ± 0.1

0.4 ± 0.2

  1. PM2.5 concentrations are taken from the scenario with Arctic Council wildfires included, while the ‘wildfire-attributed’ PM2.5 is from the difference between the two scenarios with and without Arctic Council wildfires. Arctic Council states are denoted using bold text, while the other countries shown are the eight countries with the highest proportion of Arctic Council wildfire-sourced PM2.5. In addition, China is included due to its high Arctic wildfire-attributed excess deaths.