Variations in ocean currents, sea ice concentration, and sea surface temperature along the North-East coast of Greenland (NEG-OCEAN)

格陵兰岛东北海岸 (NEG-OCEAN) 沿线洋流、海冰浓度和海面温度的变化

基本信息

批准号：
265420783
负责人：
Dr.-Ing. Denise Dettmering, since 5/2015
金额：
--
依托单位：
Deutsches Geodätisches Forschungsinstitut
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2015
资助国家：
德国
起止时间：
2014-12-31 至 2018-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/265420783?language=en
关键词：
Variations ocean currents sea ice

项目摘要

Based on remote sensing data the temporal evolution of ocean surface currents at the North Eastcoast of Greenland shall be determined and - together with sea ice concentration and sea surfacetemperature - analyzed in order to provide a basis for studying (together with two bundled projects)the coupling mechanism between ice sheet, ocean, and sea ice.During the last decades the Greenland ice sheets experienced a strongly increased mass loss of icesheets, both due to enhanced surface melting and due to the acceleration of outlet glaciers andhigher ice export rates. Compared to the earlier decades, the conuibution of the Greenland ice sheetto global sea level rise doubled during the last two decades. Melt water changes the thermalstmcture of the ice sheet and influences the basal boundary conditions. In addition, interactionsbetween the glacier tongues and the ocean water have a direct impact on the dynamics of outletglaciers. Warm fjord waters impact subglacial melting and increase the ice flux. Conversely, theincrease of fresh water flux into the coastal sea su^ongly influences the water and energy ü-ansportalong the coast. The investigation of the feedback mechanisms between the ice sheet, its marinebased outlet glaciers and the ocean circulation in dependence of atmospheric forcing is therefore anextremely important step in understanding the variability of this complex system and itsimplications on a global scale. The present project focuses on the ocean component. A dedicatedprocessing of satellite altimeter data combined with the most recent gravity field models is used toestimate a time series of the dynamic ocean topography which can be transformed into ageostrophic velocity field. Principal component analyses of topography, sea ice concentration andsea surface temperature shall identify the most dominant modes, in order to provide a basis forinvestigating correlation with mass loss of ice sheets and studying the coupling mechanism betweenice sheet, ocean and sea ice.

根据远程数据，应确定绿地北沿岸海面电流的时间演变，并进行冰浓度和海洋海洋温度 - 分析，以提供（以及在Icein和Sea之间的两个Bundred Projects）的基础由于表面融化的增强，格陵兰冰冰的质量大大增加，并且在过去的二十年中，格陵兰冰上全球海平面上升了两倍冰盖和基础边界条件外，冰川舌和海水之间的相互作用对漏斗器的动力学直接影响。 üüüüüüüü的沿海冰川和海洋循环之间的机制在y循环中依赖于这种复杂的系统，并与卫星数据的专用数据相结合。大多数现场模型是动态海洋地形的时间序列，将其转化为年龄型速度场。表E。