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Table 4

UV integrated fluxes.

Spectral Type O2 MR (% PAL) UVA 315–400 nm (W m−2) UVB 280–315nm (W m−2) UVC 121.6–280 nm (W m−2)



TOA Surface % to surf. TOA Surface % to surf. TOA Surface % to surf.
G0V 100 96.6 77.9 80.7 22.4 1.5 6.7 11.2 3.8e−27 3.4e−26
G0V 10 96.6 76.7 79.4 22.4 1.4 6.2 11.2 1.8e−08 1.6e−07
G0V 1 96.6 77.5 80.3 22.4 2.4 10.7 11.2 1.7e−04 1.5e−03
G0V 0.1 96.6 78.6 81.4 22.4 5.9 26.3 11.2 1.7e−02 1.5e−01

Sun 100 82.9 67.5 81.4 16.2 1.6 10.2 6.7 2.8e−21 4.1e−20
Sun 10 82.9 66.5 80.2 16.2 1.6 9.6 6.7 3.3e−08 5.0e−07
Sun 1 82.9 67.1 81.0 16.2 2.7 16.4 6.7 2.3e−04 3.5e−03
Sun 0.1 82.9 67.7 81.7 16.2 5.6 34.8 6.7 1.5e−02 2.3e−01

K2V 100 34.2 28.0 81.9 4.8 0.68 14.1 1.4 1.1e−18 8.0e–17
K2V 10 34.2 27.6 80.8 4.8 0.74 15.4 1.4 1.8e−08 1.3e−06
K2V 1 34.2 27.8 81.4 4.8 1.2 25.4 1.4 1.0e−04 7.3e−03
K2V 0.1 34.2 28.0 81.8 4.8 2.2 44.8 1.4 1.0e−02 7.2e−01

K5V 100 15.3 12.8 83.6 0.68 0.10 14.4 0.16 2.1e−21 1.3e−18
K5V 10 15.3 12.6 82.6 0.68 0.14 20.1 0.16 8.4e−09 5.1e−06
K5V 1 15.3 12.7 82.9 0.68 0.23 33.6 0.16 5.4e−05 3.3e−02
K5V 0.1 15.3 12.7 83.0 0.68 0.34 50.4 0.16 4.7e−03 2.8e+00

M5V 100 1.6 1.3 83.8 3.5e−02 6.5e−03 18.4 2.7e−02 9.8e−21 3.6e−17
M5V 10 1.6 1.3 83.1 3.5e−02 1.0e−02 28.8 2.7e−02 4.1e−09 1.5e−05
M5V 1 1.6 1.3 83.4 3.5e−02 1.6e−02 45.7 2.7e−02 3.8e−05 1.4e−01
M5V 0 1.6 1.3 83.4 3.5e−02 2.0e−02 56.3 2.7e−02 1.1e−03 4.2e+00

Notes. Abbreviations: MR = mixing ratio; PAL = present atmospheric level; TOA = top of atmosphere.

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