Why should the eccentricity of the earth's orbit make winter different in the north hemisphere than the south?
North or South, latitude makes the difference depending on the angle of incidence of solar rays, The tilt of the Earth's axis at
When it is winter solstice in North, it is summer solstice in South.
During this season, North pole is hidden to the Sun. The polar axis turns the North Pole away from the Sun, while South Pole sees Sun. In summer solstice, it is vice versa.
The sea area is more in the southern hemisphere. This causes difference in mean temperatures, at latitudes