Shelf-Basin Exchange near 79N Glacier and Zachariae Isstrom, North-East Greenland

格陵兰岛东北部 79N 冰川和 Zachariae Isstrom 附近的陆架盆地交换

• 批准号: 1362109
• 负责人: Andreas Muenchow
• 金额: $ 17.27万
• 依托单位: University of Delaware
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-12-01 至 2015-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1362109&HistoricalAwards=false
• 关键词: Shelf; Basin; Exchange; near; 79N

The objectives of the proposed RAPID project are to deploy an array of five moored ocean current, salinity, temperature, and two subsurface pressure sensors across the 200-400 m deep Norske Ore Trough in the summer of 2014 from aboard the R/V Polarstern, a German research icebreaker. The proposed array will observe the circulation within this channel system at dynamically relevant time and space scales. Ultimately, the recovered data will be used to test the hypothesis that a clock-wise shelf circulation off north-east Greenland between 76N and 82N latitude provides warm Atlantic waters towards one of the last remaining stable floating ice-shelves in Greenland (Niog-halvfjerdsfjorden Gletscher called 79N Glacier) via a 20-40 km wide system of troughs.Degradation of the Greenland and Antarctic Ice Sheets is a major contributor to global sea level rise. One cause of the accelerating degradation of these ice sheets is believed to be the transport of heat from the continental slope to the face of tidewater glaciers. Models and qualitative arguments suggest that this transport is enhanced by cross-shelf channels that minimize mixing of the transported waters with cold, ambient shelf waters. This project is an attempt to observe the importance of such transport mechanisms.The funded activities support a nascent international collaboration. The resultant data set will add to both public and scientific debate related to climate change. Public outreach and engagement will be facilitated via http://IcySeas.org, a research blog established and maintained by the PI as part of NSF?s ?Science: Becoming the Messenger? program.

拟议的RAPID项目的目标是在2014年夏天，从德国研究破冰船R/V Polarstern上，在200-400米深的Norske矿槽部署5个系泊洋流、盐度、温度和两个地下压力传感器。所提出的阵列将在动态相关的时间和空间尺度上观察该通道系统内的环流。最终，收集到的数据将用于验证这样一个假设，即在北纬76度和北纬82度之间，格陵兰东北部的顺时针冰架环流通过20-40公里宽的沟槽系统，为格陵兰最后一个稳定的漂浮冰架（nioghalvjerdsfjorden Gletscher称为79N冰川）提供温暖的大西洋水。格陵兰岛和南极冰盖的退化是全球海平面上升的一个主要原因。据信，这些冰盖加速退化的一个原因是热量从大陆斜坡输送到潮汐冰川的表面。模式和定性论证表明，跨大陆架通道加强了这种输送，减少了输送的水与大陆架周围的冷水的混合。这个项目试图观察这种运输机制的重要性。所资助的活动支持一种新生的国际合作。由此产生的数据集将增加与气候变化有关的公众和科学辩论。公众接触和参与将通过http://IcySeas.org，一个由PI作为NSF的一部分建立和维护的研究博客来促进。年代?科学：成为信使？程序。