Wednesday, April 11, 2012

Top 5 natural phenomenon

5.Penitentes

They are a snow formation found at high altitudes.They take the form of tall thin blades of hardened
 snow and can be as tall as a person.



















4. Red tides

Red tide is a common name for algal bloom.It is an event in which marine or fresh water algae
( eg : Gonyaulax - genus of Dinoflagellates) accumulate rapidly in the water and causes in discoloration
of the surface water due to the presence of photosynthetic pigments in them.















 


3.Light pillar

Light pillars are a kind of optical phenomenon. They are formed by the reflection of sunlight by
 ice crystals that are present in the Earth's atmosphere.The light pillar is prominently visible when the
Sun is low or lies below the horizon. Light pillars can sometimes also be seen arising from the Moon.




























2.Waterspout


waterspout is a small-diameter column of rapidly swirling air in contact with a water surface.Though they occur majority in the tropics, they can also seasonally appear in temperate areas throughout the world.Waterspouts are closely related to other atmospheric phenomena such as tornadoes, whirlwinds and fire storms.






























1.Aurora
 Aurora, is the glow in the sky seen at polar latitudes.It is caused by the collision of energetic
 charged particles with atoms in the high altitude atmosphere.





















credits: Google images

 


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