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Enhanced North Pacific Subpolar Gyre Circulation Led to Hypoxia Events During Last Deglacial Warm Periods

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Observational analysis revealed strengthening of subpolar gyre ties to hypoxia in North Pacific, indicating climate impact.

Hypoxia events in the North Pacific were linked to enhanced subpolar gyre circulation during warming periods.
The mean temperature difference between NE and NW Pacific indicated significant subpolar gyre variation.
Enhanced upwelling of nutrient-rich waters likely expanded oxygen minimum zones during the Bolling-Allerod and early Holocene.
The shifts in westerlies contributed to the complex dynamics of ocean circulation and productivity.

Chen et al. (2025) studied this question.

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