Abrupt population declines in ancient China more than 3,000 years ago were likely driven by intensified typhoons and catastrophic flooding, according to a new study published in the journal Science Advances on March 4. The research combines analysis of ancient oracle bone inscriptions, archaeological evidence, and paleoclimate modeling to build a case that extreme weather reshaped two of China’s earliest civilizations.
The study focuses on the Shang dynasty, which ruled the Yellow River valley from 1600 to 1046 B.C. The Shang controlled a region known as the Central Plains, often described as the cradle of Chinese civilization, and are recognized for producing the earliest known evidence of Chinese writing: divination texts carved onto turtle shells and ox shoulder bones, collectively called oracle bones.
What the Oracle Bones Revealed
Researchers examined more than 55,000 pieces of oracle bone script dated between 1250 and 1046 B.C., the final two centuries of Shang rule. They tracked instances of weather-related writing and found a notable increase in divinations concerning heavy rain and water-related disasters during the middle of that period. The pattern suggests growing anxiety within Shang society about extreme rainfall and flooding in the Central Plains.
The inscriptions themselves offer a direct window into that anxiety. One oracle bone asks, “Will there be a disaster?” Another reads, “Is this rain auspicious?” The character for disaster in that script visually resembles a series of waves.
Archaeological Evidence Beyond the Shang
The Shang were not alone in their misfortune. The research team also examined archaeological data from the Chengdu Plain, southwest of the Central Plains, home to the Shu kingdom, a contemporaneous civilization that endured until 316 B.C.
The findings from Chengdu were direct. Flood-damaged buildings dated to around 950 B.C. Flood-destroyed dikes appeared around 500 B.C. Archaeological sites across the plain decreased in number over time and clustered at higher elevations, indicating that populations moved to escape rising waters.
The Paleoclimate Picture
The team’s paleoclimate modeling tied these on-the-ground findings to specific storm patterns across two distinct time windows. Northward typhoon activity intensified between 1850 and 1350 B.C., correlating with the disruptions experienced by the Shang in the Central Plains. A separate intensification of westward typhoon activity between 850 and 500 B.C. aligned with the flooding events recorded in the Chengdu Plain during the Shu period.
“What stood out here was intensified typhoon activities,” the researchers wrote, linking that activity to widespread inland flooding and the resulting population decline and social upheaval across both regions.
The Shang dynasty ultimately collapsed in 1046 B.C., overthrown by the Zhou people. Tens of thousands of bronze, ceramic, and jade artifacts excavated from the Shang capital at modern-day Anyang had previously illustrated the dynasty’s wealth and sophistication before its fall. The new study adds a climatic dimension to that collapse, suggesting that the natural environment played a measurable role in weakening one of China’s most consequential early states.
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