Short-term effects of Gamma Ray Bursts on oceanic photosynthesis

Details Short-term effects of Gamma Ray Bursts on oceanic photosynthesis Short-term effects of Gamma Ray Bursts on oceanic photosynthesis

2010-07-16

arxiv.org/abs/1007.2879v1

Astronomy and Astrophysics

Astrophysics

Earth and Planetary Astrophysics

Accepted for publication in Astrophysics and Space Science

Scientific paper

We continue our previous work on the potential short-term influence of a gamma ray bursts on Earth's biosphere, focusing on the only important short-term effect on life: the ultraviolet flash which occurs as a result of the retransmission of the {\gamma} radiation through the atmosphere. Thus, in this work we calculate the ultraviolet irradiances penetrating the first hundred meters of the water column, for Jerlov's ocean water types I, II and III. Then we estimate the UV flash potential for photosynthesis inhibition, showing that it can be important in a considerable part of the water column with light enough for photosynthesis to be done, the so called photic zone.

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