Late Quaternary Paleoclimatic History of Southern Chile: Evidence from the Marine Record

南美洲南部提供了从极地到温带气候环境的自然和几乎连续的过渡。因此，从智利大陆边缘恢复高分辨率的晚第四纪古海洋和古气候记录是建立南半球海洋、大气和陆地系统之间时间和物理联系的重要一步。该奖项涉及智利南部环太平洋边缘沉积物的晚第四纪海洋记录。通过对现代和晚第四纪沉积物的硅藻、有孔虫和矿物学分析，将完成高分辨率的生物地层、古生态、古海洋和古气候学重建。将这些结果与陆地和冰芯数据的古气候解释进行比较，将有助于更全面地了解海洋-大气-大陆对气候变化的响应。该项目需要在智利南部开发高分辨率晚第四纪气候记录，用于：(1)建立了南极半岛与南美洲晚第四纪冰川/气候波动的时间和程度关系；(2)完成了古气候初步研究的区域框架，从而为南美洲南部和南极半岛地区新冰川史的详细研究奠定了基础。

Southern South America provides a natural and almost continuous transition from polar to temperate climatic settings. The recovery of high resolution late Quaternary paleooceanographic and paleoclimatic records from the Chilean continental margin is thus an essential step in establishing the temporal and physical linkages between the oceanographic, atmospheric, and terrestrial systems of the southern hemisphere. This award addresses the late Quaternary marine record of marginal sediments of the Pacific rim of southern Chile. High resolution biostratigraphic, paleoecologic, paleooceanographic, and paleoclimatologic reconstructions will be accomplished through diatom, foramineral, and mineralogic analyses of modern and late Quaternary sediments. Comparing these results with paleoclimatic interpretations of terrestrial and ice core data will lead to a more comprehensive understanding of the ocean-atmosphere-continent response to climate change. The development of a high resolution late Quaternary climate record from southern Chile by this project is required for: (1) establishing the relationships in the timing and extent of late Quaternary glacial/climatic fluctuations between the Antarctic Peninsula and South America and (2) completing a regional framework of preliminary paleoclimatic studies, thereby leading to detailed future research on the neoglacial history of southern South America and the Antarctic Peninsula region.