Scientists Discover Connection Between Floods and Droughts Globally

Connection Between Floods and Droughts

Researchers monitoring Earth's water from space have uncovered that the climatic phenomena El Niño and La Niña synchronize floods and droughts across continents. According to a recent study, when these climate cycles intensify, regions separated by vast distances can simultaneously become extremely wet or severely dry. This research shows that water crises are not isolated events but part of a global pattern.

The study published in AGU Advances emphasizes that over the past two decades, ENSO, a recurring climatic pattern in the equatorial Pacific, has played a critical role in causing extreme changes in global water storage. Furthermore, researchers found that ENSO aligns these extremes so that different continents experience unusually wet or dry conditions at the same time.

Bridget Scanlon, a co-author of the study and research professor at the Bureau of Economic Geology at the University of Texas, explained the importance of understanding these global patterns: "We can identify areas that are simultaneously wet or dry, which affects water availability and food production." When multiple regions face either water shortage or excess, the impact can resonate in agriculture, trade, and humanitarian planning.

This study is among the first to examine extreme total water storage concerning ENSO on a global scale. Researchers utilized gravitational data from the GRACE and GRACE-FO satellites to estimate total water storage, allowing them to observe how extreme wet and dry conditions are correlated across vast distances.