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Documenting, understanding and projecting changes in the hydrological cycle in the American cordillera (CRN2047)
The project examines hydrological cycles in the American cordillera, specifically in North America and basins in Bolivia, Chile, and Argentina. Initial results include a 700-year tree-ring reconstruction showing severe 14th-century droughts in the high Andes that led to social conflict and village abandonment. In Chile, a slight decline in streamflow over the last century is noted, with significant rainfall drops in 1945 linked to the Pacific Decadal Oscillation. Additionally, drought risk in the southern Andes was higher between 1920 and 2002 than between 1346 and 1919, threatening agriculture and hydroelectric power.
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Document type: Fact sheet