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

topp -98-13532这是由俄亥俄州立大学的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。他们将使用海底表征和测绘吊舱（SCAMP），该吊舱已安装在一艘美国海军潜艇上，用于专门的科学巡航（SCICEX）。他们将从北冰洋海底获取测绘数据，以检验更新世北极冰盖存在的假设。检验这一假设的为数不多的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将为获得这些数据提供一个独特的机会。主要研究人员将使用SCAMP收集楚科奇边境地区、罗蒙索夫山脊部分地区、可能还有加拿大大陆边缘地区的后向散射、带状测深和海底剖面数据。他们将试图寻找冰下和冰边缘的海底特征、冰山标志、冰川底标记、冰边缘指示物和其他与冰川有关的泥石流。如果没有直接的冰下特征被揭示出来，冰山标志的深度范围将提供冰期北冰洋冰层厚度的关键信息。绘制犁标方向将有助于重建北冰洋古环流格局。这些数据将由夏威夷测绘研究小组与Lamont-Doherty地球天文台的科学家合作处理，他们主要负责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.