Climate system

The totality of the atmosphere, hydrosphere, biosphere, and geosphere and their interactions.

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El Niño

An irregularly occurring climatic phenomenon, but that usually occurs every three to five years. It is evident during the Christmas season (El Niño referes to "baby Jesus") on the oceanic surfaces of the eastern part of the tropical Pacific Ocean. The phenomenon...

United Nations Framework Convention on Climate Change or the Climate Change Convention

See UNFCCC.

Climate change

Changes that are directly or indirectly attributed to human activity and alter the composition of the world's atmosphere and that is added to that caused by the natural climatic variability observed over comparable periods.