Potential effects of ultraviolet radiation reduction on tundra nitrous oxide and methane fluxes in maritime Antarctica.

ABSTRACT: Stratospheric ozone has begun to recover in Antarctica since the implementation of the Montreal Protocol. However, the effects of ultraviolet (UV) radiation on tundra greenhouse gas fluxes are rarely reported for Polar Regions. In the present study, tundra N₂O and CH₄ fluxes were measured under the simulated reduction of UV radiation in maritime Antarctica over the last three-year summers. Significantly enhanced N₂O and CH₄ emissions occurred at tundra sites under the simulated reduction of UV radiation. Compared with the ambient normal UV level, a 20% reduction in UV radiation increased tundra emissions by an average of 8 μg N₂O m^-2 h^-1 and 93 μg CH₄ m^-2 h^-1, whereas a 50% reducti

SUBMITTER: Bao T 

PROVIDER: S-EPMC5829069 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature