Scientists say they are more certain than ever about the impact of global warming on a critical weather pattern.
The El Nino-Southern Oscillation (ENSO) occurs in the Pacific Ocean but plays an important part in the world's climate system.
Researchers have until now been unsure as to how rising temperatures would affect ENSO in the future. But this new study suggests that droughts and floods driven by ENSO will be more intense.
The ENSO phenomenon plays a complicated role in the global weather system.
The El Nino part of the equation sees a warming of the eastern and tropical Pacific, while its cooler sister, La Nina, makes things chillier in these same regions.