Collaborative Research: SCICEX/SCAMP Mapping of the Arctic Ocean Floor to Test the Hypothesis of the Pleistocene Arctic Ice Sheet

这是与俄亥俄州州立大学的Leonid Polyak博士和夏威夷大学夏威夷测绘研究小组的Margo Edwards博士合作提出的一项建议。 他们将使用海底表征和测绘吊舱（SCAMP），该吊舱已安装在美国海军潜艇上，用于专门的科学巡航（SCICEX）。 他们将获得北冰洋海底的测绘数据，以检验更新世北极冰盖存在的假设。 测试这一假设的少数可靠方法之一是直接对北冰洋海底相对较浅的部分进行冰川影响成像。 SCAMP将提供获得这些数据的独特机会。 主要调查人员将使用SCAMP收集楚科奇边界、Lomonsov海岭部分地区以及可能的加拿大大陆边的后向散射、条带测深和浅地层剖面仪数据。他们将试图寻找冰下和冰缘海底特征、冰山犁痕、冰川底部标记、冰缘指示器和其他与冰川有关的泥石流。 如果没有发现直接的冰下特征，冰山犁痕的深度范围将提供有关冰川期北冰洋冰厚度的重要信息。 绘制犁痕方向图将有助于重建北冰洋古环流模式。 这些数据将由夏威夷测绘研究小组与拉蒙特-多尔蒂地球观测站的科学家合作处理，拉蒙特-多尔蒂地球观测站的科学家主要负责SCAMP的工程和开发。

AbstractOPP-98-13532This is a collaborative proposal with Dr. Leonid Polyak at the Ohio State University and Dr. Margo Edwards from the Hawaii Mapping Research Group at the University of Hawaii. They will use the Seafloor Characterization and Mapping Pod (SCAMP) which has been installed on a U.S. Navy submarine for a dedicated science cruise (SCICEX). They will obtain mapping data from the Arctic Ocean floor to test the hypothesis of the existence of a Pleistocene Arctic Ice Sheet. One of the few reliable methods of testing this hypothesis is to directly image the relatively shallow portions of the Arctic Ocean seafloor for glacial impact. SCAMP will provide a unique opportunity to obtain these data. The Principal Investigators will use SCAMP to collect backscatter, swath bathymetry, and subbottom profiler data across the Chukchi Borderland, parts of the Lomonsov Ridge, and possibly the Canadian continental margin. They will attempt to find sub-glacial and ice-marginal seafloor features, iceberg plowmarks, glacial-sole markings, ice-marginal indicators, and other glacier-related debris flows. If no direct sub-glacial features are revealed, the depth range of iceberg plowmarks will provide critical information on the thickness of ice in the Arctic Ocean during glacial periods. Mapping plowmark orientation will allow for the reconstruction of the Arctic Ocean paleo-circulation patterns. The data will be processed by the Hawaii Mapping Research Group in collaboration with scientists at Lamont-Doherty Earth Observatory who were primarily responsible for the engineering and development of SCAMP.