This is caused by differences in ozone between the Northern and Southern Hemispheres, and also because the Earth is slightly closer to the Sun during the Southern Hemisphere summer (McKenzie and Elwood, 1990).
(This; is caused; by differences in ozone between the Northern and Southern Hemispheres) (the Earth; is; slightly closer to the Sun during the Southern Hemisphere summer)
This the Earth
is caused is
by differences in ozone between the Northern and Southern Hemispheres
slightly closer to the Sun during the Southern Hemisphere summer