Past+Climates+(P3)

Climate Factors: 1.) The earths orbit and tilt affects the direct and inderect rays of sunlight. There are also changes inside the sun which causes weak and strong sunlight. The suns intensity has increased by 30% in the last 10,000 years. The weak sunlight causes cooling and the strong sunlight causes heating of the earth.

2.) Volcanic eruptions emit two kinds of gases they are Aerosol and Carbon dixoide. Aerosol causes short term cooling becasue it blocks the sunlight form getting to the earths surface, the evidence is conclusive becasue they used New England in 1816 as an example, "the year without a summer." Carbon dixoide is a long term heating of the earth, the carbon dixoide slowly gets trapped in the atmosphere during the greenhouse effect, and the evidence is not conclusive becasue they cannot prove it yet.

3.) The level of carbon dixoide in the atmospehere affects the tempertaure. For example when the earth heats the oceans release carbon dixoide and when the earth cools CO2 goes into the oceans and travel through the gulf streams and can contribute to additional cooling. CO2 levels have been high during glacial periods.

Climate Period: 1.) The medieval Climate Anomaly was between 900 and 1300 AD. The climate conditions were mostly warm in Europe and Asia.

2.) The little ice age took place between 1500 and 1850. It was not considered a true ice age because major ice sheets were not devoloped. The tempeture was about 2*F colder than today (Varied by region)

3.) Industrial era the time period was from 1900-2000. It was considered a warming condition because of all the increasing emmisions from greenhouse gases.

Geo-Political (Period 3)