Climate+change+in+the+past+million+years

Climate Change in the Past Million Years
By Devon Archambault and Shawnee Mason

**Climate change** is any long-term significant change in the expected patterns of average weather of a specific region over an appropriately significant period of time. Climate change is frequently associated with the collapse of civilizations, cities and dynasties. Notable collapses for which climate change has been suggested as a cause include Harappa, the Hittites and the civilization in Ancient Egypt. **History**: In the past 2,000 years it has been pretty stable. Scientists have identified three departures from this stability One is called The Medieval Climate Anomaly. This was around 900 and 1300 AD. Evidence has said that Europe, Greenland and Asia experienced warmth. Some warmth that occurred in some regions were the geographical extent, magnitude and timing of the warmth. The American West experienced dry conditions at this time period. Another was called the Little Ice Age. This was around 1500 and 1850. This was not a true Ice age because major sheets of ice didn't develop across the land. The average temperatures were up to 2 Degrees Fahrenheit. And lastly there was the Industrial Era. Which was a warm period that has emerged in the last 100 years. There has been increasing emissions of greenhouse gases from human activities. The sea level in the last century has risen 5 to 6 inches,and from the last ice age 120 meters. For the past century the average rise in sea level was 1.8 but now it is around 2.1 a year. When the sea level changed some of the ice caps started to melt and sea level raised about 4-5 meters and the temperature in the Arctic was about 3-5 degrees hotter. They are predicting that the sea level will rise 10-15 inches by 2025.

This picture to the right shows the history of sea level changes.

Sites for pictures:
 * [|www.joergresag.privat.t-online.de/ mybk4htm/ca]...

Sites for website:
 * []
 * []
 * []

Site for Wikispace:
 * http://climate-jigsaw.wikispaces.com/The+History+of+Sea+Level+Changes