Do perihelion and aphelion effect seasons?
Perihelion and aphelion can have a small effect on seasons.
The main reason why we have seasons is due to the
Currently perihelion occurs around 3 January and aphelion occurs around 3 July. Due to the fact that the southern hemisphere has a large area of ocean and the specific heat capacity of water is high, the southern hemisphere retains a lot of the heat during its Winter months. The Earth is actually a few degrees warmer on average in July than it is in January.
The date of perihelion is precessing at a rate of about a day every 70 years. In about 12,000 years perihelion will be in the northern hemisphere Summer. As the northern hemisphere has a lot of land area Summers will be warmer while perihelion is in the northern hemisphere Summer months.