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New study maps monsoon shifts over 450,000 years

Original: "Interhemispheric monsoon dynamics over the past 450,000 years", Olsen et al, 2026 https://www. nature.com/articles/s415

A new Nature paper by Olsen and colleagues reconstructs interhemispheric monsoon dynamics across the past 450,000 years, examining how rainfall patterns shift between hemispheres over glacial cycles. Early commentary online focuses on the study's implications for an AMOC collapse, with readers highlighting projections of reduced rainfall over densely populated regions such as India and China, versus increased rain over the South Pacific and Indian oceans.

Why now: The study's findings on how ocean circulation collapse could redistribute monsoon rainfall are alarming for heavily populated Asian regions.

Olsen et alNatureAMOCIndiaChina

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• "Interhemispheric monsoon dynamics over the past 450,000 years", Olsen et al, 2026 https://www. nature.com/articles/s41586-026 -11166-3 🔒 When AMOC stops, where do we get more rain? In unpopulated regions, over the South Pacific and Indian ocean. India and China? Say goodbye to… · anlomedad@fedifreu.de · 3

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