A combined analysis of sedimentological, molecular, and microfossil proxies was used to determine paleoclimatic and paleoceanographic variations and assess sediment transport pathways along the last c.a. 6300 years in a sedimentary record collected on the inner shelf of the southwestern Atlantic Ocean. The combined use of terrestrial and marine proxies enables a more complete environmental perspective of the La Plata River plume influence on the southwestern Atlantic shelf, regarding the relationship between climate, productivity, as well as hydrodynamic. Variations in marine productivity, lipid biomarkers of terrestrial plants, diagnostic geochemical indices, and sea-surface temperature point to three phases within the core. The first interval (6300–5200 cal yr BP) was characterized by low marine and terrigenous organic matter input, with pulses of phytodetritus indicated by benthic foraminifera. These features suggested dry climatic conditions over the southeastern portion of South America, with the influence of sediments from the adjacent continent and, on a smaller scale, transported from the Argentinian shelf due to the high relative sea level. The second interval (5200–2800 cal yr BP) was distinguished by a slight increase in marine productivity and terrigenous input, indicating a transition period with an increase of total rainfall influenced by an intensified South American Monsoon System (SAMS) and the modern El Niño-Southern Oscillation (ENSO) phenomenon. These features, associated with the changes in wind patterns and the lower relative sea level, suggest the onset of the influence of the La Plata River (LPR) plume over the southern regions of the Brazilian continental shelf for the last 6300 cal yr BP. The last interval (2800–890 cal yr BP) had the highest contents of marine and terrigenous proxies, suggesting less climatic variability, as the long-term intensification of the SAMS and a further increase in the amplitude of the ENSO resulted in the modern establishment and dominant influence of the LPR plume on the core site. Variations in sea-surface temperature up to 3.3°C were related to the influence of the LPR plume on the shelf off southern Brazil.

对沉积学、分子和微化石替代物的综合分析用于确定古气候和古海洋学变化，并评估在大西洋西南部内陆架上收集的沉积记录中过去大约 6300 年的沉积物输送路径。结合使用陆地和海洋代理，可以更完整地了解拉普拉塔河羽流对西南大西洋大陆架的影响，以及气候、生产力和水动力之间的关系。海洋生产力、陆生植物脂质生物标志物、诊断地球化学指数和海面温度的变化指向核心内的三个阶段。第一个区间（6300-5200 cal yr BP）的特点是海洋和陆源有机质输入量低，用底栖有孔虫指示的植物碎屑脉冲。这些特征表明南美洲东南部的气候条件干燥，受到来自相邻大陆的沉积物的影响，并且由于相对海平面较高，因此在较小的范围内从阿根廷大陆架搬运而来。第二个区间（5200-2800 cal yr BP）的特点是海洋生产力和陆源输入略有增加，表明受南美季风系统（SAMS）和现代厄尔尼诺现象影响，总降雨量增加的过渡期- 南方涛动 (ENSO) 现象。这些特征，与风模式的变化和较低的相对海平面有关，表明拉普拉塔河 (LPR) 羽流在过去 6300 cal BP 对巴西大陆架南部地区的影响开始了。最后一个间隔（2800-890 cal yr BP）海洋和陆源代理的含量最高，表明气候变异较小，因为SAMS的长期强化和ENSO幅度的进一步增加导致现代建立LPR 羽流对核心站点的主要影响。高达 3.3°C 的海面温度变化与 LPR 羽流对巴西南部大陆架的影响有关。由于 SAMS 的长期强化和 ENSO 振幅的进一步增加，导致 LPR 羽流对核心站点的现代建立和主导影响。高达 3.3°C 的海面温度变化与 LPR 羽流对巴西南部大陆架的影响有关。由于 SAMS 的长期强化和 ENSO 振幅的进一步增加，导致 LPR 羽流对核心站点的现代建立和主导影响。高达 3.3°C 的海面温度变化与 LPR 羽流对巴西南部大陆架的影响有关。