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

女性研究机会奖(ROW)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。在这项工作中，将对位于威尔克斯陆地海岸外的内陆架盆地乔治五世盆地的现有沉积物岩心进行采样。这些都是高分辨率研究的理想选择，因为在未受干扰和未混合的层状切片中保存的细节，以及相对较高的沉积速率(每年约3毫米)。据推测，层状部分的起源是因为在必然无冰的海洋环境中广泛的初级生产力导致向海底的高碳通量和沉积物-水界面以下的缺氧条件的发展。非分层(混合的，也可能是生物扰动的)沉积物的交替间隔记录了更广泛或更持久的海冰覆盖下的沉积。从岩芯获得的测量结果将用于模拟南极冰盖从大陆架撤退到目前位置以来的一段时间内的盆地沉积历史。放射性碳测年将使沉积物岩芯与其他高分辨率替代气候数据(例如来自冰芯的数据)相关联，并将作为海洋和陆地气候记录之间的联系。最终，预计这些结果可以用来预测在其他南极边缘盆地中哪里可以找到类似的高分辨率替代记录，以便分析可以扩展到评估地质上最近的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.