Collaborative Research Project: Paleoceanographic Records of Western Arctic Shelf-Basin Interactions

OPP-9817051 OPP-9815738 OPP-9817806DARBY，Dennis DWYER，Gary Poore，RICHARDOLD Dominion University Duke University USGSOPP-9817053 OPP-9817054McManus，James Polyak，LEONIDOREGON州立大学俄亥俄州立大学这项研究项目将利用微化石和沉积物特性，利用目前50-10万年前的现有沉积物岩芯重建北冰洋的古海洋学。它们将审查地表水物理特征过去的变异性和敏感性，盐跃层和常年冰盖的历史，陆架和斜坡上产生的有机碳的去向，以及北冰洋西部地表水生产力和地下结构和环流的变化。重建过去的条件将提供一幅北冰洋在过去5-10万年来在已知气候条件下如何演变的图景。结果将被用来预测碳从大陆架向深盆地的运输将如何进行，直到气候条件发生变化。该项目的结果将为规划2002年陆架盆地相互作用项目的大型第二阶段实地方案提供投入。

ABSTRACTOPP-9817051 OPP-9815738 OPP-9817806DARBY, DENNIS DWYER, GARY POORE, RICHARDOLD DOMINION UNIVERSITY DUKE UNIVERSITY USGSOPP-9817053 OPP-9817054McMANUS, JAMES POLYAK, LEONIDOREGON STATE UNIVERSITY OHIO STATE UNIVERSITYThis research project will utilize microfossils and sediment properties to reconstruct the paleoceanography of the Arctic Ocean using available sediment cores for the period 50-100 thousand years before present. They will examine the past variability and sensitivity of surface water physical characteristics, the history of the halocline and perennial ice cover, and the fate of organic carbon produced on shelves and slopes as well as variations in surface-water productivity and subsurface structure and circulation of the western Arctic Ocean. The reconstruction of past conditions will provide a picture of how the Arctic Ocean evolved under the known climate conditions for the past 50-100 thousand years. The results will be used to predict how the transport of of carbon from continental shelves to the deep basin might proceed until changed climate conditions. The results of this project will provide input for planning a large Phase 2 field program of the Shelf Basin Interactions project in 2002.