An extensive assessment of the water level records for the last 113 years reveals that the frequency and severity of floods in the Amazon River have increased fivefold over the last two to three decades, with the dramatic change, at least partially, driven by global warming.
The analysis shows that the gap of 20 years, which used to punctuate two successive severe floods in the Amazon basin in the early 20th century, has now shrunk to an average of just four years, writes Science Daily.
The researchers attribute the uptick in extreme flooding events in the Amazon basin to the warming Atlantic Ocean and the cooling Pacific Ocean, which give rise to Walker Circulation, characterized by high precipitation, reports Inhabitat.
Global warming, the scientists believe, has an indirect role in this phenomenon, as it pushes the wind belts further south, channeling warm water from the Indian Ocean to the Atlantic.
Source: Blouin News