Ice sheet Dynamics and Processes along the West Antarctic Continental Shelf

南极西部大陆架沿线的冰盖动力学和过程

• 批准号: 0838735
• 负责人: Frank Nitsche
• 金额: $ 16.02万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-06-01 至 2013-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0838735&HistoricalAwards=false
• 关键词: Ice; sheet; Dynamics; Processes; along

AbstractPI: Frank O. NitscheProposal Number: 0838735Title: Sheet Dynamics and Processes along the West Antarctic Continental ShelfThis award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). The West Antarctic Ice Sheet is believed to be vulnerable to climate change as it is grounded below sea level, is drained by rapidly flowing ice streams and is fringed by floating ice shelves subject to melting by incursions of relatively warm Antarctic circumpolar water. Currently, the most rapidly thinning glaciers in Antarctica occur in the Amundsen and Bellingshausen Sea sectors. This study seeks to place the present day observations into a longer-term geological context over a broad scale by high-resolution swath bathymetric mapping of continental shelf sea floor features that indicate past ice presence and behavior. Gaps in existing survey coverage of glacial lineations and troughs indicating ice flow direction and paleo-grounding zone wedges over the Ross, Amundsen and Bellingshausen Sea sectors are targeted. The surveys will be conducted as part of the 2010 Icebreaker Oden science opportunity and will take advantage of the vessel?s state-of-the-art swath mapping system.Broader impacts:This activity will supplement and complement more focused regional studies by US, Swedish, UK, French, Japanese and Polish collaborators also sailing on the Oden. The PI will compile bathymetric data to be acquired by the Oden and other ships in the region over the duration of the project into the existing bathymetric data base. The compiled data set will be made publically available through the NSF founded Antarctic Multibeam Bathymetry and Geophysical Data Synthesis (AMBS) site. It will also be integrated into the GEBCO International Bathymetric Chart of the Southern Ocean (IBCSO) and so significantly improve the basis for ship navigation in the Pacific sector of the Southern Ocean. Undergraduate students will be involved in the research under supervision of the PI via the Lamont summer internship program. The PI is a young investigator and this will be his first NSF grant as a PI.

Abstract PI：Frank O. Nitche提案编号：0838735职务：西南极大陆架沿着的板块动力学和过程该奖项是根据2009年美国复苏和再投资法案（公法111-5）资助的。 据信，南极西部冰盖很容易受到气候变化的影响，因为它位于海平面以下，被快速流动的冰流排干，并且边缘是漂浮的冰架，容易因相对温暖的南极绕极水的入侵而融化。 目前，南极洲冰川最迅速变薄的地区是阿蒙森海和别林斯高晋海。 这项研究旨在通过对大陆架海底特征进行高分辨率条带测深测绘，将目前的观测结果纳入更长期的地质背景中，这些特征表明过去的冰存在和行为。 在罗斯海、阿蒙森海和别林斯高晋海的冰川线理和冰槽的现有调查覆盖面中，有空白表明冰流方向和古接地带楔。 调查将作为2010年破冰船奥登科学机会的一部分进行，并将利用船舶？更广泛的影响：这项活动将补充和补充美国、瑞典、英国、法国、日本和波兰合作者也在奥登号上航行的更有针对性的区域研究。 PI将把Oden号和该区域其他船只在项目期间获得的测深数据汇编到现有的测深数据库中。 汇编的数据集将通过国家科学基金会建立的南极多波束测深和地球物理数据综合网站提供。 它还将被纳入大大洋深度图国际南大洋等深线图，从而大大改善南大洋太平洋部分船舶航行的基础。 本科生将通过拉蒙暑期实习计划在PI的监督下参与研究。 PI是一个年轻的研究人员，这将是他作为PI的第一个NSF赠款。