| Stratospheric ozone depletion increases downwelling radiation, particularly in the UV-B portion of the spectrum. |
| Ambient light at mesopelagic depths consists of dim, nearly monochromatic, and primarily downwelling solar radiation. |
| The model was more sensitive to leaf orientation than leaf optical properties, seabed reflectance, or the average cosine of downwelling irradiance. |
| As the spectral distribution narrows with depth, the angular distribution of the downwelling light broadens. |
| In this model run, anoxia is triggered by halving the O2 content of the downwelling water. |
| One possible explanation would be downwelling of dry air, which is also consistent with deeper clouds observed at the southern pole. |
