Global warming and climate change are terms for the observed century-scale rise in the average temperature of the Earth's climate system and its related effects. Multiple lines of scientific evidence show that the climate system is warming.Although the increase of near-surface atmospheric temperature is the
measure of global warming often reported in the popular press, most of
the additional energy stored in the climate system since 1970 has gone
into ocean warming. The remainder has melted ice and warmed the
continents and atmosphere. Many of the observed changes since the 1950s are unprecedented over decades to millennia.