A season may be defined as a subdivision of the year, marked by changes in weather, ecology, and hours of daylight as a result from the revolution of the Earth around the Sun and the tilt of the Earth’s axis relative to the plane of revolution.
The northern hemisphere is exposed to more direct sunlight during the months of May, June and July, because the hemisphere faces the sun. The same phenomenon happens in southern hemisphere during the months of November, December and January. Due to 23.5° tilt of the Earth the Sun is higher in the sky during the summer months which increases the solar flux. However, due to seasonal lag, June, July and August are the hottest months in the northern hemisphere whereas December, January and February are the hottest months in the southern hemisphere. At any given time of the year one part of the planet is more directly exposed to the Sun’s rays. This exposure alternates because of Earth’s revolution in its orbit. At any given time of the year, the northern and southern hemispheres experience opposite seasons.
Seasonal weather differences between hemispheres are further caused by the Earth’s elliptical. Earth reaches perihelion, when it is closest to the Sun in January, and it reaches aphelion when it is farthest from the Sun in July. It noticeably softens the winters and summers in the northern hemisphere. In the southern hemisphere, the opposite effect is observed.
Seasonal changes also depend on factors such as proximity to oceans or other large bodies of water, currents in those oceans, oceanic cycles, and prevailing winds.
In temperate and sub-polar regions, generally four calendar-based seasons are followed: spring, summer, autumn and winter. In some tropical and subtropical regions the amount of rain varies more dramatically. Due to which these regions have rainy or monsoon season and the dry season. In other tropical areas a three-way division into hot, rainy, and cool season is used.
In the temperate and polar regions, seasons are marked by changes in the amount of sunlight, which in turn often causes cycles of dormancy in plants and hibernation in animals. These effects vary with latitude and with proximity to bodies of water.
In the tropics, there is no noticeable change in the amount of sunlight. However, many regions such as the northern Indian oceans are subject to monsoon rain and wind cycles.
Image source: https://chowchowbath.com/blogimages/SeasonschangeasBengaluruembracesSummer_11208/seasons.jpg
https://1.bp.blogspot.com/-Gx5M9txynao/TWUDypNjOmI/AAAAAAAAAmM/ymUSDah0Rhc/s1600/SEASONS.png
SchoolTutoring Academy is the premier educational services company for K-12 and college students. We offer tutoring programs for students in K-12, AP classes, and college. To learn more about how we help parents and students in Kanata visit: Tutoring in Kanata.