The seasonal fluctuation of photosynthetic gases causes a maximum oxygen release during the Northern Hemisphere's late summer (August - September) while at the same time, oxygen is at a minimum in the Southern Hemisphere's late winter.
(The seasonal fluctuation of photosynthetic gases; causes; a maximum oxygen release during the Northern Hemisphere's late summer) (oxygen; is; at a minimum in the Southern Hemisphere's late winter; T:at the same time)
The seasonal fluctuation of photosynthetic gases oxygen
causes is
a maximum oxygen release during the Northern Hemisphere's late summer
at a minimum in the Southern Hemisphere's late winter T:at the same time