Over the coming century, both Arctic and Antarctic sea ice cover are projected to substantially decline. While many studies have documented the potential impacts of projected Arctic sea ice loss on the climate of the mid-latitudes and the tropics, little attention has been paid to the impacts of Antarctic sea ice loss. Here, using comprehensive climate model simulations, we show that the effects of end-of-the-century projected Antarctic sea ice loss extend much further than the tropics, and are able to produce considerable impacts on Arctic climate. Specifically, our model indicates that the Arctic surface will warm by 1 °C and Arctic sea ice extent will decline by 0.5 × 10 6 km 2 in response to future Antarctic sea ice loss. Furthermore, with the aid of additional atmosphere-only simulations, we show that this pole-to-pole effect is mediated by the response of the tropical SSTs to Antarctic sea ice loss: these simulations reveal that Rossby waves originating...

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预计南极海冰损失导致北极强劲变暖

在未来的一个世纪中，预计北极和南极海冰覆盖率都将大幅下降。尽管许多研究已经记录了预计的北极海冰损失对中纬度和热带地区气候的潜在影响，但很少有人关注南极海冰损失的影响。在这里，通过使用综合的气候模型模拟，我们表明，到本世纪末，南极海冰损失的影响要比热带地区扩大得多，并且能够对北极气候产生重大影响。具体来说，我们的模型表明，北极冰层将变暖1°C，北极海冰范围将因未来南极海冰的损失而下降0.5×10 6 km 2。此外，借助其他仅限大气的模拟，