1. Climatic Changes

2. Ice Ages Glaciers have advanced and retreated the last 2 million years
It is called an ice age when much of the Earth’s surface is covered with vast sheets of ice
Ice ages alternate with warm periods called interglacial intervals
The most recent ice age ended about 10,000 years ago

5. Short-term Climatic Changes
The change of seasons also area change in climate
This change in temp and precip is caused from the change in solar radiation received by that area

6. El Nino
This is caused from a warm ocean current that from off the west coast of S. America
This causes the NW coast of S. America to be warmer and wetter then normal
The increased precip pumps large amounts of heat and moisture into the upper atmosphere
The temp difference in the upper atmosphere allows the jet streams over the US to dip farther south
El Nino brings stormy weather to normally dry places and causes drought in normally wet places
El Nino does hinder hurricane activity