A closer look at “Ancient Stalagmites Reveal Exceptions to Asia–South America Monsoon Seesaw Over 450,000 Ye”, exactly as the source publishes it. A new study of ancient stalagmites from China and Brazil reveals that the long-held 'monsoon seesaw' pattern—where a strong Asian monsoon often coincides with a weak South American monsoon, and vice versa—has had notable exceptions over the past 450,000 years. Researchers analyzed oxygen isotope records from cave formations, which preserve rainfall history, and found that while the seesaw holds on average, it breaks down during certain periods, especially when ice sheets in the Northern Hemisphere were large.
These exceptions mean that drought risks in Asia and South America do not always balance each other, complicating predictions for water resources, agriculture, and hydropower across the two regions. The findings, published in a peer-reviewed journal, highlight the need to consider long-term climate variability when planning for future monsoon changes under global warming. For the complete material, the listing points back to the source inside the network.