Effect of inhomogeneous surface albedo on UV radiation in the Antarctic environment ...
Each year in Antarctica, the period of greatest biological production in the coastal waters coincides with the onset of the ozone hole [Davidson and van der Heijden, 2000]. UV irradiance, enhanced by stratospheric ozone depletion and by highly reflective snow, may impact on the biota blooming in sea...
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| Format: | Thesis |
| Language: | unknown |
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University Of Tasmania
2023
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| Online Access: | https://dx.doi.org/10.25959/23246141.v1 https://figshare.utas.edu.au/articles/thesis/Effect_of_inhomogeneous_surface_albedo_on_UV_radiation_in_the_Antarctic_environment/23246141/1 |
| Summary: | Each year in Antarctica, the period of greatest biological production in the coastal waters coincides with the onset of the ozone hole [Davidson and van der Heijden, 2000]. UV irradiance, enhanced by stratospheric ozone depletion and by highly reflective snow, may impact on the biota blooming in sea ice and the marginal sea ice zone. This thesis examines how surface reflectivity influences the downwelling UV irradiance at the ground in the Antarctic environment. The work is based on numerical model simulations and on field observations. A 3-D Monte Carlo model of the transmission of UV radiation through the Antarctic atmosphere was developed for both clear and overcast sky conditions. It incorporated inhomogeneity of surface reflectance. Simulations were performed over a surface of 100 x 100 km\\(^2\\), one half of which was snow-covered ice and the other half was ocean. Multiple reflections of photons between the high albedo snow-covered surface and the atmosphere enhance both spectral (296 - 400 nm) and ... |
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