| | |
 | | touch me | by kalandrakas on Flickr |
| - A season is a division of the year, marked
by changes in weather and hours of daylight.
- Seasons result from the yearly revolution of the Earth around
the Sun and
the tilt
of the Earth's axis relative to the plane of revolution.
- In temperate and sub-polar regions generally four calendar
based seasons are recognized: spring , summer , autumn and winter .
- However, ecologists in Europe and
Australia
are increasingly using a six season model for temperate climate
regions that includes pre-spring and late
summer as distinct seasons along with the
traditional four .
|
| - During May, June and July, the northern hemisphere is exposed to
more direct sunlight because the hemisphere faces the sun.
- The same is
true of the southern hemisphere
in November, December and January.
- However, due to seasonal
lag, June, July and August are the hottest months in the northern
hemisphere and December, January and February are the hottest months in
the southern hemisphere.
|
 | | a touch of sakura | by kalandrakas on Flickr |
| - In some tropical and subtropical regions it is more common to speak
of the rainy (or wet, or monsoon)
season versus the dry season, because the amount of precipitation may vary more
dramatically than the average temperature. For example, in Nicaragua,
the dry season is called Summer (Oct to May) and the rainy season is
called Winter (Apr to Nov) even though it is located in the northern
hemisphere.
- In other tropical areas a three-way division into hot, rainy and cool
season is used.
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