A long-term shift in the tropical Pacific Ocean has played contrasting roles in wildfire activity on opposite sides of the world, amplifying fire-prone conditions in the southwestern United States while easing them in eastern Australia. According to a new study published in the journal Nature Communications, the Pacific Ocean pattern increased drying-related burned forest area in the U.S. Southwest by about 22%, but reduced it by roughly 19% in eastern Australia. The findings are based on nearly four decades of wildfire and climate data spanning 1984 to 2022.
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