Sunday, August 29, 2010

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Why the seasons? CF No. 169

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SCIENCE EASY
No. 169 Author: Maria Cristina Chaler. Series
Juguemos to why? Why
seasons are different in each hemisphere?

In the northern hemisphere or Boreal stations oppose the South or Southern hemispheres.
is in the North v Spring (March 21) when the South begins in the fall. V In the North
shows the summer (June 21) when the southern winter begins. V In the North
begins winter (December 21) and the South begins to summer. V In the North
is autumn (21 September) and in the south is spring.

stations do not appear in the same manner and with the same intensity in each hemisphere of Earth, the Northern Hemisphere winter is much colder than the southern hemisphere and the reverse happens with the heat of summer. There are areas of the planet, between the tropics where only two seasons the wet and dry and do not talk about summer, winter, autumn or spring.
The Earth's axis tilt is one of the most important causes of seasonal variations in the four key moments of the 365 days that takes the translation of the earth around the sun.

The seasons are four, spring, summer, autumn and winter for many locations of both hemispheres and occur in different months and are manifested in different ways depending on the latitude as it depends on the inclination of Earth's axis (23.5 degrees) with respect to translational and perpendicular to the sun.

There are four important moments or points on the elliptical translation of the earth around the sun that influence differently in the northern hemisphere or Boreal and South or Southern hemisphere, two of these moments are called solstices or points farthest from the earth to the sun and two points are called equinoxes or points of land closest to the sun.
The solstices occur in the months of June and December and stations manifested are opposite in each hemisphere does not depend on the position of the distance to the sun, but the tilt of Earth's axis relative to the sun. Let

:
solstice in June, the planet is tilted to the North Pole toward the sun and the south pole so it will be opposite in the Northern Hemisphere summer with longer days and shorter nights. The closer we get to the North Pole will be shorter and the nights in the same night there will be a pole. In the South or Southern hemisphere will present the winter and Ecuador away from the night will be longer to become eternal night in the southern pole itself.
In the December solstice the planet is at the other end of the elliptical, but with the north pole furthest from the star while the south will be closer and the summer will be manifested in the south and winter in the north will be presented, giving the opposite conditions to move away of Ecuador.
In March and September equinoxes, the Earth is closest to the sun and the sun's rays strike perpendicular to the tropics but the tilt of Earth's axis away and not about any of the poles in particular, are two times when the duration of night and day are alike, and the stations do not have such extreme temperatures will be in autumn or spring.

In Ecuador and between the tropics the four seasons but do not manifest themselves distinguish a dry season of low rainfall and high temperatures and a wet heavy rain (tropical rain).

continue wondering why?


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