The dynamics of the Late Glacial have been demonstrated by numerous records from the Northern Hemisphere and far fewer from the Southern Hemisphere (SH). SH paleoclimate records reveal a general warming trend, interrupted by a deglaciation pause Antarctic Cold Reversal (ACR; ∼14,700–13,000 cal BP). Here, we present decadal tree‐ring stable isotope chronologies (δ¹⁸O, δ¹³C) from New Zealand (NZ) subfossil kauri trees (n = 6) covering the post‐ACR millennium from 13,020 to 11,850 cal BP. We find a distinct, simultaneous downturn (∼12,625–12,375 cal BP) in all tree‐ring proxies paralleling regional tree growth declines, suggesting a widespread climate deterioration. This downturn was characterized by sustained high precipitation, low temperatures, and high relative humidity in NZ with incoming weather fronts from the South Ocean. Despite these promising results, questions remain about what drove the Kauri Downturn and how the hydroclimatic conditions were altered during this time period.

中文翻译：

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新西兰南极寒冷逆转之后，贝壳杉树环稳定同位素揭示了百年气候衰退

北半球的大量记录证明了晚冰川的动力学，而南半球的记录则少得多。南半球的古气候记录显示出总体变暖趋势，被冰期暂停，南极冷逆流（ACR；〜14,700-13,000 cal BP）打断。在这里，我们目前的十年树轮稳定同位素年代学（δ ¹⁸ O，δ ¹³从新西兰（NZ）亚化石贝壳树（C）ñ = 6）涵盖了从13,020到11,850 cal BP的ACR后的千年。我们发现所有树木年轮代理均出现明显的同时低迷（〜12,625–12,375 cal BP），与区域树木生长下降平行，这表明气候正在广泛恶化。这种低迷的特点是新西兰持续的高降水，低温和高相对湿度，以及来自南大洋的天气前沿。尽管取得了这些令人鼓舞的结果，但对于造成贝壳杉低迷的原因以及这段时期的水文气候条件如何变化，仍然存在疑问。