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OUTLINES AND DYNAMICS OF EURARCTIC ICE CAPS IN ANOMALOUS GRAVITY FIELDS

机译:异常重力领域欧洲冰帽的概述和动态

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The present investigation was aimed at studying spatial variability and directional dynamics of inland ice/snow fields in relation to lateral variations of surface gravity at the sub-regional scale of tens to hundreds of kilometres. The main goal was to evidence, both theoretically and empirically, the existence and significance of gravitational impacts and associated atmospheric effects on the status and fluctuations of Eurasia’s northernmost insular ice caps using spaceborne radar altimetry and interferometry data from the Earth Explorers and Sentinel missions in conjunction with GOCE satellite gradiometry, ground-based meteorological time series and glaciological observations. EO-based geodetic and cryospheric models describing the amount of solid precipitation, snow drift and accumulation, glacier elevation change and ice flow pattern were generated, homogenized and combined in the terrain-following reference frame. The models were then verified and applied to the diagnosis of glacioclimatic differences in arctic lowlands with strong gravity anomalies. It was ascertained that surface gravity gradients modulate the atmospheric circulation and stability thereby influencing the intensity of local precipitation and glacier growth and flow patterns in a cascade fashion.
机译:本次调查的目的是研究空间变异以及有关在数万次区域级的表面重力的横向变化到几百公里的内陆冰/雪领域的定向动态。其主要目的是证明,在理论和经验,存在和引力影响的重要性,并使用通过结合地球探索者和哨兵任务星载雷达测高和干涉测量数据欧亚大陆最北端的岛屿冰盖的状态和波动相关的大气效果与GOCE卫星梯度测量,地面气象时间序列和冰川学观测。产生描述固体沉淀,雪漂移和积累,冰川海拔变化和冰流动模式的量基于EO-大地测量和冰冻圈模型,均化,并结合在地形跟踪参考帧。然后将模型进行了验证,并应用到北极低地具有较强的重力异常glacioclimatic差异诊断。可以确认表面重力梯度调节大气环流和稳定性从而影响的地方析出和生长冰川的强度并以级联方式流动图案。

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