The seasons result from the Earth's axis being tilted to its orbital plane; it deviates by an angle of approximately 23.5 degrees of arc. Thus, at any given time during the summer or winter, one part of the planet is more directly exposed to the rays of the Sun (see Fig. 1). This exposure alternates as the Earth revolves in its orbit. At any given time, regardless of season, the northern and southern hemispheres experience opposite seasons (see Fig. 2 and Month ranges of seasons (below) and Effect of sun angle on climate).
Seasonal weather fluctuations also depend on factors such as proximity to oceans or other large bodies of water, currents in those oceans, El Niño/ENSO and other oceanic cycles, and prevailing winds.
In the temperate and polar regions, seasons are marked by changes in the amount of sunlight, which in turn often cause cycles of dormancy in plants and hibernation in animals. These effects vary with latitude, and with proximity to bodies of water. For example, the South Pole is in the middle of the continent of Antarctica, and therefore a considerable distance from the moderating influence of the southern oceans. The North Pole is in the Arctic Ocean, and thus its temperature extremes are buffered by the presence of all that water. The result is that the South Pole is consistently colder during the southern winter than the North Pole during the northern winter.
Correct grammer would make the question "Why are there seasons"
2007-01-05 00:23:55
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answer #1
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answered by DanE 7
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A solstice is either of the two events of the year when the sun is at its greatest distance from the equatorial plane. The name is derived from Latin sol (sun) and sistere (to stand still), because at the solstice, the Sun stands still in declination, that is, it reaches a maximum or a minimum. The term solstice can also be used in a wider sense as the date (day) that such a passage happens. The solstices, together with the equinoxes, are related to the seasons. In some languages they are considered to start or separate the seasons; in others they are considered to be center points (in English, in the Northern hemisphere, for example, the period around the June solstice is known as midsummer, and Midsummer's Day is the 24 June — now two or three days after the solstice).
The two solstices can be distinguished by different pairs of names, depending on which feature one wants to stress.
Summer solstice and winter solstice are the most common names. However, these can be ambiguous since seasons of the northern hemisphere and southern hemisphere are opposites, and the summer solstice of one hemisphere is the winter solstice of the other.
Northern solstice and southern solstice indicate the direction of the sun's movement. The northern solstice is in June on Earth, when the sun is directly over the Tropic of Cancer in the Northern Hemisphere, and the southern solstice is in December, when the sun is directly over the Tropic of Capricorn in the Southern Hemisphere. Some consider these terms to be the most neutral and unambiguous.
June solstice and December solstice are an alternative to the more common "summer" and "winter" terms, but without the ambiguity for which hemisphere they are intended. They are still not universal, however, as not all people on Earth use a solar-based calendar where the solstices occur every year in the same month (as they do not in the Jewish calendar, for example), and the names are also not useful for other planets (Mars, for example), even though these planets do have seasons.
First point of Cancer and first point of Capricorn. One disadvantage of these names is that, due to the precession of the equinoxes, the astrological signs where these solstices are located no longer correspond with the actual constellations.
Taurus solstice and Sagittarius solstice are names that indicate in which constellations the two equinoxes are currently located. These terms are not widely used, though, and until December 1989 the first solstice was in Gemini, according to official IAU boundaries.
As far as the "Seasons" go, that would be attributedto Climate not Solstice or seasons. When the northern hemispher is tilted closer to the sun, we have winter. However, Seattle Washington does not experience the same climate at let's say Pittsburgh, PA or even London England. The Jet Streams flow control Climate, which is a totally different question.
Sorry Hope this helps
2007-01-05 08:32:03
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answer #2
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answered by danielle Z 7
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in simple words. The earth's axis verses rotation with son. Think of it in the days getting longer or shorter. This is due to the earths axes moving. It's also been used as a symbol of life. Thing (trees &plants) represent the human life. in winter things. die, Spring is the beginning of new life. Summer is the middle of life & Fall is the end. Hope this helped.
2007-01-05 08:38:18
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answer #3
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answered by Blues Man 7
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Rotation and tilt of the earth and the orbit around the sun. Closer to the equator or the poles there are less radical changes to their weather.
2007-01-05 08:18:25
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answer #4
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answered by Chuck C 4
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The clothing industry does it to make more money.
2007-01-05 08:23:07
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answer #5
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answered by Anonymous
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