What are we talking about?

During the last 100 years, the low Earth atmosphere average temperature increase of approximately 0.7°C .

The issue: Knowing that the average temperature on Earth have always varied, does the variation of the last century is :

1. Natural ?
2. Caused by human activity ?

What are the main impacts of this past average temperature change that scientists can observe?

•Regional average air temperature variation of the Earth.
•Seas levels variation.
•Polar ice coverage variation.
•Atmosphere activity variation and particularly the cyclones activity.
•Biodiversity variation.
•And.... atmospheric CO2 variation.

What was the low atmosphere CO2 content variation during the 20th century?

Antarctic atmospheric CO2 content

source : Laboratoire de Glaciologie et Géophysique de l'Environnement

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