According to new research from Live Science, a cold patch forming in the North Atlantic Ocean is altering the Indian summer monsoon through shifts in the jet stream—the river of wind that normally separates Arctic and tropical air. When these Atlantic cold anomalies develop, they redirect the jet stream's path, which changes where monsoon rains fall across South Asia. For over a billion people who depend on monsoon rainfall for agriculture and water supply, these shifts can have serious consequences for food security and livelihoods.

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