Late Holocene Climate History Recorded in Laminated Sediments from the George V. Coast, Antarctica

这项妇女研究机会（ROW）奖是对南极大陆架层状沉积物的研究，目的是重建全新世（最近2500年）的气候记录。乔治五世盆地是位于威尔克斯陆地海岸外的一个内陆大陆架盆地，现有的沉积物岩心将在这项工作中取样。这些都是理想的高分辨率研究，因为细节保存在未受干扰和未混合的层状切片中，因为相对较高的沉积速率（每年约3毫米）。据推测，叠层段的形成是因为在必然无冰的海洋环境中广泛的初级生产力导致了高碳通量的海底和沉积物-水界面以下缺氧条件的发展。交替的非层状（混合的，可能是生物扰动的）沉积物记录了在更广泛或更持久的海冰覆盖下的沉积。从岩心获得的测量数据将用于模拟从南极冰盖从大陆架退缩到现在位置以来的盆地沉积历史。放射性碳测年将使沉积物岩心与其他高分辨率代用气候数据（例如，来自冰芯的）相关联，并将作为海洋和陆地气候记录之间的联系。最终，预计这些结果可用于预测在其他南极边缘盆地中可能找到类似的高分辨率替代记录，以便将分析扩展到评估地质近期气候变化对南大洋海洋和沉积条件的影响。

This Research Opportunity for Women (ROW) award is a study of laminated sediments from the antarctic continental shelf in order to reconstruct the Holocene (the most recent 2500 years) climatic record. Existing sediment cores from the George V. Basin, a deep inner continental shelf basin located off the Wilkes Land Coast, will be sampled in this effort. These are ideal for high resolution study because of the detail preserved in the undisturbed and unmixed laminated sections, and because of the relatively high (approximately three millimeters per year) sedimentation rates. It is hypothesized that the laminated segments originated because extensive primary productivity in a necessarily ice-free ocean environment resulted in high carbon fluxes to the sea floor and the development of anoxic conditions below the sediment-water interface. Alternating intervals of non-laminated (mixed, and probably bio-turbated) sediments record deposition under a more extensive or persistent sea ice cover. The measurements obtained from the cores will be used to model the history of basin deposition in the time interval since the retreat of the antarctic ice sheet form the continental shelf to its present position. Radiocarbon dates will allow the correlation of the sediment cores to other high resolution proxy climate data (e.g. from ice cores), and will serve as a link between the marine and terrestrial climate records. Ultimately it is expected that these results can be used to predict where similar high resolution proxy records may be found in other antarctic marginal basins, so that the analysis may be extended to assess the effects of geologically recent climatic change on oceanographic and depositional conditions in the Southern Ocean.