To address long-standing questions concerning Southern Hemisphere climate dynamics and palaeoecological change in southern Africa, a Late Glacial-Holocene alluvial sediment sequence from the relatively dry interior year-round rainfall zone in South Africa was investigated. The study site borders the Fynbos biome and Succulent Karoo biome ecotone, and comprises a rare stratified sequence of sandy and organic-rich silt deposits, shown to span the last 14,000 years. A high resolution multi-proxy record of ecological change was derived using pollen, phytoliths and organic geochemical analyses. For the period 14–11 ka, significant valley aggradation occurred under relatively drier conditions, followed, during the early and middle Holocene, by alternating phases of humid and dry events with higher stream energy, slower accumulation or subtle seasonality changes. A transition from relatively humid to more arid conditions at 4–3 ka is identified and is consistent in timing with several interior year-round rainfall zone records. Results revealed alternations of fynbos and karroid elements and C₃/C₄ grasses throughout the last fourteen thousand years, but did not suggest large-scale biome shifts. The record joins a growing number of sites contributing to debate over the complex atmospheric-oceanic drivers of palaeoclimate in this region. These data broadly fit to the regional pattern for the southernmost interior of South Africa in showing alternating influences from the westerly winter rain systems in the early Holocene, with a greater contribution from subtropical summer rain system during the middle and later Holocene.

为了解决有关南部非洲南半球气候动态和古生态变化的长期问题，研究了来自南非相对干燥的内部全年降雨带的晚冰川-全新世冲积沉积序列。该研究地点与Fynbos生物群落和肉质Karoo生物群落过渡带接壤，包括罕见的分层层状含沙和富含有机物的粉砂沉积物，显示了近14,000年的历史。利用花粉，植石和有机地球化学分析获得了高分辨率的多代理生态变化记录。在14-11 ka期间，在相对较干燥的条件下发生了明显的谷地凝结，随后在全新世早期和中期，湿润和干燥事件交替出现，河流能量较高，积累速度较慢或季节性变化微妙。可以确定在4–3 ka时从相对潮湿的状态过渡到更干旱的状态，并且与几个内部全年降雨区记录的时间安排一致。结果揭示了股骨和类固醇和C的交替在过去的一万四千多年中，₃ / C _4的草丛没有出现大规模的生物群落转移。该记录加入了越来越多的站点，为有关该地区古气候的复杂大气海洋驱动因素的辩论做出了贡献。这些数据大体上与南非最南端内部的区域格局相吻合，显示出全新世早期由西风冬季降雨系统产生的交替影响，而全新世中期及以后的亚热带夏季雨水系统贡献更大。