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On Earth, seasons are the result of the axial parallelism of Earth's tilted orbit around the Sun. [2] [3] [4] In temperate and polar regions, the seasons are marked by changes in the intensity of sunlight that reaches the Earth's surface, variations of which may cause animals to undergo hibernation or to migrate, and plants to be dormant ...
Thus, the greater the axial tilt, the stronger the seasons' variations at a given latitude. [4] Seasonal differences in the Sun's declination, as viewed from the mid-northern city of New York, New York This solargraph exposed over the course of a year shows the Sun's paths of diurnal motion, as seen from Budapest in 2014.
Given the different Sun incidence in different positions in the orbit, it is necessary to define a standard point of the orbit of the planet, to define the planet position in the orbit at each moment of the year w.r.t such point; this point is called with several names: vernal equinox, spring equinox, March equinox, all equivalent, and named considering northern hemisphere seasons.
This is the cause of Earth's seasons. Summer occurs in the Northern hemisphere when the north pole is directed toward and the south pole away from the Sun. Variations in Earth's axial tilt can influence the seasons and is likely a factor in long-term climatic change (also see Milankovitch cycles).
The growing season is now more than 50 days longer than it was in the 1970s in cities like Medford, Oregon, and Myrtle Beach, South Carolina, according to a new analysis from Climate Central.
The main cause of the Year Without a Summer is generally held to be a volcanic winter created by the April 1815 eruption of Mount Tambora on Sumbawa. [ 7 ] [ 8 ] [ 9 ] The eruption had a volcanic explosivity index (VEI) ranking of 7, and ejected at least 37 km 3 (8.9 cu mi) of dense-rock equivalent material into the atmosphere. [ 10 ]
Winter is the coldest and darkest season of the year in temperate and polar climates.It occurs after autumn and before spring.The tilt of Earth's axis causes seasons; winter occurs when a hemisphere is oriented away from the Sun.
The wet season (sometimes called the rainy season or monsoon season) is the time of year when most of a region's average annual rainfall occurs. [1] Generally, the season lasts at least one month. [2] The term green season is also sometimes used as a euphemism by tourist authorities. [3]