Permafrost-Glacier Interactions and its impact on alpine landscape evolution (PerGInt)

欧洲阿尔卑斯地区小冰期后的冰川景观遗产包括指示前永久冻土-冰川相互作用的地貌，这些地貌往往导致突出甚至壮观的地貌，然而，对冰冻圈这两个组成部分的关系和相互作用的研究很少受到关注。冰川和冰缘地貌反映气候、地形和岩性条件，指示过去或现代的环境条件。有关地下非均质程度及其对过程动力学的影响的问题出现了。这项研究计划的主要目标是确定地表和地下性质之间的相互联系，并破译在何种环境条件下可能形成冰川构造变形的冰碛，以及在当前气候状况和未来可能的大气变暖趋势下，这些地貌目前受到变化的程度。为了实现这一目标，将根据现场（温度数据、2D和3D地球物理测量）、机载（运动摄影测量的结构）和卫星测量（SAR干涉测量）绘制表征高山地质系统的地表和地下参数。建议的地球物理方法有可能提供地下内部结构和性质变化的空间甚至体积信息。遥感和近地遥感技术能够以高空间和时间分辨率探测和监测垂直和/或水平位移，这些位移可以与地形参数、地下特征和热状态联系起来。通过收集到的地表和地下数据的关系，可以分析不同参数之间可能的相互联系。综合方法提高了对地表和地下参数之间的相互依赖关系以及过程关系的理解，从而可以推导出所调查地貌的更先进的概念模型，这些模型显示了地貌、沉积物特征和永久冻土条件影响之间的遗传关系。预期的新发现将构成在变化的环境条件下产生高山景观演变情景的基础

The glacial landscape legacy after the period of the Little Ice Age in the area of the European Alps comprises landforms indicative of former permafrost-glacier interactions which oftentimes lead to prominent or even spectacular landforms, nevertheless investigations on the relationship and interaction of both components of the cryosphere have been given little attention. Glacial and periglacial landforms reflect climatic, topographic and lithological conditions and are indicative for past or modern environmental conditions. Questions arise concerning the degree of subsurface heterogeneity and its impact on process dynamics. The main goal of this research proposal is the identification of interconnections between the properties of the surface and the subsurface and to decipher under which environmental conditions glaciotectonically deformed moraines could have formed and to what extent these landforms are currently subject to changes under the present climatic situation and possible future atmospheric warming trends. To reach this goal, the surface and subsurface parameters characterizing the alpine geosystem will be mapped based on in-situ (temperature data, 2D and 3D geophysical surveying), airborne (structure from motion photogrammetry), and satellite borne measurements (SAR interferometry). The suggestedgeophysical methods have the potential to provide spatial or even volumetric information on the subsurface internal structure and property variations. The remote and proximal sensing techniques enable to detect and monitor vertical and/or horizontal displacements with a high spatial and temporal resolution which can be linked to terrain parameters, subsurface characteristics and the thermal regime. Through the relation of the collected surface and subsurface data, possible interconnections of the different parameters can be analysed. The improved understanding of the interdependencies between the surface and subsurface parameters and the processual relationships from the integrative approach allows to derive more advanced conceptual models of the investigated landforms, which show the genetic relationship between landform, sediment characteristics and the influence of permafrost conditions. The expected new findings will form the basis to generate scenarios of alpine landscape evolution under changing environmental conditions