Inter-hemispheric asynchrony of climate change through the last deglaciation has been theoretically linked to latitudinal shifts in the southern westerlies via their influence over CO₂ out-gassing from the Southern Ocean. Proxy-based reconstructions disagree on the behaviour of the westerlies through this interval. The last deglaciation was interrupted in the Southern Hemisphere by the Antarctic Cold Reversal (ACR; 14.7 to 13.0 ka BP (thousand years Before Present)), a millennial-scale cooling event that coincided with the Bølling–Allerød warm phase in the North Atlantic (BA; 14.7 to 12.7 ka BP). We present terrestrial proxy palaeoclimate data that demonstrate a migration of the westerlies during the last deglaciation. We support the hypothesis that wind-driven out-gassing of old CO₂ from the Southern Ocean drove the deglacial rise in atmospheric CO₂.

通过最后一次冰消期，半球间气候变化的不同步在理论上与南西风带的纬度变化有关，因为它们对从南大洋释放的CO ₂产生影响。基于代理的重建不同意西风带在这个区间的行为。南半球的最后一次冰消被南极冷逆转（ACR；14.7 至 13.0 ka BP（千年前））中断，这是一个千年尺度的冷却事件，与北大西洋的 Bølling-Allerød 暖期相吻合（ BA；14.7 至 12.7 ka BP）。我们提供了陆地代理古气候数据，这些数据证明了最后一次冰消期间西风带的迁移。我们支持旧 CO ₂风驱动除气的假设来自南大洋推动了大气 CO ₂的冰消期上升。