Greenhouse gases are trapping a lot of heat in the climate system and most of it is ending up in the ocean.
Atmospheric carbon dioxide levels continue to climb, averaging 400 parts per million for the month of February — the earliest in the year Earth has hit this global warming milestone on record.
This is the first time in at least 800,000 years, and possibly as long as 2 million, that atmospheric carbon dioxide levels have been this high.
The 10 warmest years on record globally have all happened since 1998, with 2014 on top as the warmest of all.
A look at how El Niño influences global weather patterns.
A graphical look at the top indicators of a warming world.
Record lows are outpacing record highs since last year. This is becoming rarer in a warming world.
The amount of carbon dioxide in the atmosphere has a strong correlation with rising temperatures.