Climate of entire earth is not the same.There are reasons
The average temperature at a given point on the Earth's surface is not
all year due to the changing seasons.
There are three reasons for this phenomenon:
• The revolution of the Earth around the Sun
• The planet's round shape, and the inclination of its axis of daily
• The axis of the poles, in relation to the plane of its orbit around the
The Earth revolves around the Sun in an elliptical orbit contained within a
called the ecliptic plane. Because its orbit is only slightly off-center,
moves in a nearly circular path. The Earth makes one complete rotation
the Sun in one year.
Because the Earth is round, the Sun's rays are perpendicular to its surface
Equator, and increasingly oblique as they got closer to the poles.
This means that for a given quantity of solar energy reaching the ground,
heated surface will be smaller at the Equator than at the poles. The
therefore receives more energy per surface unit than the poles.In addition,
closer one gets to the poles, the greater distance the Sun's rays must
through the atmosphere, losing energy along the way.
As a result, the Equator receives twice as much solar energy than a
60 degrees latitude.
However, the phenomenon of the seasons, is solely due to the fact that the
of the poles is not perpendicular to the ecliptic plane. In other words,
equatorial plane is not congruent with the ecliptic plane. There is an
obliquity, of 23.5 degrees between them.
If this angle were zero, at any given latitude, for example in Paris, the
solar energy received would be the same in December as in June, and there
would be no difference in temperature between winter and summer.The
of solar energy received is lower resulting in cold winter weather.On the
hand, in June the Sun's rays reach at the same latitude at much more
perpendicular angle. The quantity of energy received is higher. It's