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

摘要-9817051 DARBY，DENNIS Dwyer，加里Poore，Richardold自治领University杜克大学USGSOPP-9817053 詹姆斯·麦克马纳斯（James McMANUS） POLYAK，LEONIDOREGON州立大学俄亥俄州州立大学该研究项目将利用微体化石和沉积物特性，利用现有的沉积物岩心重建北冰洋的古海洋学，时间为5 - 10万年前。 他们将研究过去地表水物理特征的变化和敏感性、盐跃层和常年冰盖的历史、冰架和斜坡上产生的有机碳的命运以及北冰洋西部地表水生产力和地下结构和环流的变化。 对过去条件的重建将提供一幅过去5万至10万年来北冰洋在已知气候条件下如何演变的图景。 研究结果将用于预测在气候条件发生变化之前，碳从大陆架向深海盆地的运输可能如何进行。 该项目的结果将为2002年陆架盆地相互作用项目第二阶段大型现场方案的规划提供投入。

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.