Calcareous loess in North Canterbury, eastern South Island, New Zealand (NZ), preserves subfossil bird bone, terrestrial gastropods, and eggshell, whose abundances and radiocarbon ages allowed us to reconstruct aspects of palaeoenvironment at high resolution through 25 to 21 cal ka BP. This interval includes millennial-scale climatic variability during the extended last glacial maximum (30–18 ka) of Australasia. Our loess palaeoclimatic record shows good correspondence with stadial and interstadial climate events of the NZ Climate Event Stratigraphy, which were defined from a pollen record on the western side of South Island. An interstade from 25.4 to 24 cal ka BP was warm but also relatively humid on eastern South Island, and loess grain size may indicate reduced vigour of the Southern Hemisphere westerly winds. The subsequent stade (24–22.6 cal ka BP) was drier, colder, and probably windier. The next interstade remained relatively dry on eastern South Island, and westerly winds remained vigorous. The 25.4–24 ka interstade is synchronous with Heinrich stade 2, which may have driven a southward migration of the subtropical front, leading to warming and wetting of northern and central South Island and retreat of Southern Alps glaciers at ca. 26.5 ka.

中文翻译：

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来自新西兰奥特阿罗阿北坎特伯雷的卡斯山黄土部分的南半球末次盛冰期古环境记录

新西兰 (NZ) 南岛东部北坎特伯雷的钙质黄土保存着亚化石鸟类骨骼、陆地腹足动物和蛋壳，其丰度和放射性碳年龄使我们能够通过 25 到 21 cal ka BP 以高分辨率重建古环境的各个方面。该区间包括大洋洲末次盛冰期延长（30-18 ka）期间的千年尺度气候变化。我们的黄土古气候记录与 NZ 气候事件地层学（根据南岛西侧的花粉记录定义）的 stadial 和 interstadial 气候事件有很好的对应关系。南岛东部从 25.4 到 24 cal ka BP 的交界处温暖但也相对潮湿，黄土颗粒大小可能表明南半球西风的活力减弱。随后的舞台（24-22。6 cal ka BP）更干燥、更冷，而且可能风更大。下一个交界处南岛东部仍然相对干燥，西风依然强劲。25.4-24 ka 的跨台与 Heinrich 台 2 同步，这可能推动了副热带锋向南迁移，导致南岛北部和中部变暖和湿润，以及南阿尔卑斯山冰川在 ca 后退。26.5 卡。