Estimation of global glacier mass changes

全球冰川质量变化的估计

• 批准号: 397595256
• 负责人: Privatdozent Dr. Tobias Bolch
• 金额: --
• 依托单位: Institut für Geodäsie
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/397595256?language=en
• 关键词: Estimation; global; glacier; mass; changes

The main objective of this subproject is to derive long-term glacier mass changes based on remote sensing data. We will mainly use existing multi-temporal digital elevation models to obtain the mass changes for the ~period 2000 – 2013 and two subperiods therein. For validation, calibration and uncertainty estimation high resolution stereo imagery, ICESat laser altimetry and in-situ mass balance measurements will be used. An important task is to improve existing algorithms for ICESat data and to acquire new high resolution data in order to test the potential for obtaining seasonal variations of mass changes. For this, Project P8 will concentrate on the two glacierised critical regions within WaterGAP, the endorheic basins of the Tibetan Plateau and the Ganges basin along with smaller catchments within these regions. Derived glacier mass changes will be applied to recalibrate HYOGA2, the glacier scheme in the global hydrological model WaterGAP, for the period ~2000 onwards, and will support the separation of the glacier signal from the other components of the GRACE signal over glacierised regions.

该分项目的主要目标是根据遥感数据得出冰川质量的长期变化。我们将主要利用现有的多时相数字高程模型来获得2000 - 2013年及其两个子期的质量变化。为了进行验证、校准和不确定性估计，将使用高分辨率立体图像、ICESat激光测高和现场质量平衡测量。一项重要的任务是改进ICESat数据的现有算法，并获取新的高分辨率数据，以测试获取质量变化季节性变化的潜力。为此，项目P8将集中于WaterGAP内的两个冰川化关键区域，即青藏高原和恒河流域的内陆盆地沿着这些区域内的较小集水区。推导出的冰川质量变化将用于重新校准全球水文模型WaterGAP中的冰川方案HYOGA 2，用于2000年以后的时期，并将支持冰川信号与冰川化地区GRACE信号的其他组成部分的分离。