Quantifying the controls on, influences and glaciological impacts of glacier disconnections on ice masses in the Himalaya (Op2302)

量化冰川断开对喜马拉雅山冰块的控制、影响和冰川影响（Op2302）

• 批准号: 2883465
• 金额: --
• 依托单位: Newcastle University
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2883465
• 关键词: Quantifying; controls; influences; glaciological; impacts

Himalayan glaciers are thinning and receding rapidly in response to the ongoing climate change. The topography further imparts the non-linear response of these glaciers to climate change, leading to a heterogenous thinning and recession across the region. However, the alarming rate of thinning and receding in recent decades has caused detachment and disconnections between the accumulation and ablation area in many Himalayan glaciers. This trend is expected to continue as glaciers will downwaste and fragment more, given the warming rates. Disconnections between glacier's accumulation and ablation areas can lead to stagnation of glacier tongue with reduced surface velocity, increased debris cover and accelerated recession. The controls on and influence of disconnections on ice masses and ice flow dynamics are understudied in the Himalaya, and this hampers our ability to reliably predict future glacier behaviour in the region. Reliable prediction is crucial for assessing future melt water availability, sustainable water resource management and preparedness towards looming cryospheric hazards in the region. So, the main goals of my project are to quantify the climatic, glaciological, and topographic controls on glacier disconnections, to study the physical impacts of disconnections on glacier ice mass and ice flow dynamics and to quantify how widespread the issue of glacier disconnections is in the Himalayas using a combination of remote sensing methods, numerical modelling of glaciers and field-based studies.

喜马拉雅冰川正在响应持续的气候变化而迅速变薄并迅速退缩。地形进一步赋予了这些冰川对气候变化的非线性反应，从而导致整个地区的异质变化和衰退。然而，近几十年来，稀疏和退缩的速度令人震惊，导致许多喜马拉雅冰川的积累和消融区之间的分离和断开。考虑到变暖的速度，冰川将继续下降和碎片，预计这种趋势将继续下去。冰川的积累和消融区域之间的断开可能导致冰川舌头停滞，表面速度降低，碎屑覆盖率增加和加速衰退。在喜马拉雅山对脱节对冰块和冰流动力学的控制和影响的控制和影响会妨碍我们可靠地预测该地区未来冰川行为的能力。可靠的预测对于评估未来的熔融水利用率，可持续的水资源管理以及对迫在眉睫的冰圈危害的准备。因此，我项目的主要目标是量化冰川断开连接的气候，冰川学和地形控制，以研究脱节对冰川冰质量和冰流动态的物理影响，并量化冰川脱节的问题是如何使用远程构成的远程模型和数字模型的组合来广泛的冰川脱节问题。