Decadal East Asian monsoon anomalies and implications for societal conflicts.
Zhao K, Liang Y, Huang C, Wang Y, Sun W
Climate Adaptation
The same monsoon patterns that historically wiped out harvests across China still govern rainfall for crops feeding hundreds of millions of people today — and this research shows they can flip from flood to drought within a decade.
Scientists used cave formations — layers of minerals deposited by dripping water over centuries — to reconstruct China's rainfall history from 1787 to 2007. They found that five major dry spells, linked to weak sunlight and shifts in ocean currents, caused farming collapses so severe they fueled mass social uprisings. The study is a warning that these patterns of feast and famine can recur, putting food systems at serious risk.
Key Findings
Five major monsoon extremes between 1787 and 2007 CE caused megadroughts across China, each triggered by reduced solar output and amplified by Atlantic and Pacific ocean-atmosphere interactions.
A rapid flood-to-drought switch in the 1850s is linked to contributing factors behind the Taiping Rebellion (1851–1864 CE), one of history's deadliest conflicts, illustrating direct climate-to-crop-to-conflict pathways.
The East Asian summer monsoon has shown a persistent weakening trend since the end of the Little Ice Age (~1850), overlaid by decadal oscillations that can rapidly destabilize agricultural regions.
chevron_right Technical Summary
A 220-year cave mineral record from China reveals that East Asian monsoon collapses — driven by low solar activity and amplified by ocean circulation — triggered megadroughts that caused widespread crop failure and even contributed to the Taiping Rebellion. The findings show a clear link between monsoon extremes and societal instability, with implications for future climate resilience.
Abstract Preview
The East Asian summer monsoon anomalies, responsible for floods and droughts across China, pose great challenges to the climate resilience of human society. However, mechanisms and impacts of decad...
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