Monday 14 September 2015

The Ice Age

There were four major Ice Ages in Earth's history. The earliest of these is believed to have occurred around 2.7 - 2.3 billion years ago during the Proterozonic period*.

The Big Chill - The abrupt cooling about 1.5 million years ago led to the last ice age known as Pleistocene Epoch, probably resulted from small shifts in the Earth's tilt towards the Sun.

The climate was divided into two periods :

  • Glacial Period(Cold)
  • Inter Glacial Period(Warm)
Glacial Period

The current Inter Glacial period began around 10,000 years ago.

After 5,000 years of irregular warming and cooling the world shifted from Glacial period to the current Inter Glacial period.

El NiNo Phenomenon - It is the reversal in the flow of water in the Pacific ocean that causes change in weather in every 2 to 7 years time. It is one of the most powerful factor that affects climate after seasons. It is the warm phase and its counterpart cool phase is known as La Nina Phenomenon. 

*Proterozonic Period - The period extending between 2.5 Billion years and 541 million years ago.

No comments:

Post a Comment

Follow me on Blogarama