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

darby, DENNIS DWYER, GARY POORE， RICHARDOLD DOMINION UNIVERSITY杜克大学mcmanus， JAMES POLYAK， leonidid俄勒冈州立大学俄亥俄州立大学本研究项目将利用微化石和沉积物特性，利用现有沉积物岩心重建距今5 -10万年的北冰洋古海洋学。他们将研究过去地表水物理特征的可变性和敏感性，盐跃层和常年冰盖的历史，大陆架和斜坡上产生的有机碳的命运，以及地表水生产力的变化和北冰洋西部的地下结构和环流。对过去条件的重建将提供过去5 -10万年在已知气候条件下北冰洋如何演变的图景。这些结果将被用来预测在气候条件改变之前，碳从大陆架到深盆地的运输将如何进行。该项目的结果将为2002年陆架盆地相互作用项目的大型第2阶段实地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.