Seasonality and variations in moisture-supply on different timescales (1-104 yrs) and their relation to surface processes in the NW Himalaya

喜马拉雅山和中亚邻近山区（古）气候研究中的一个突出问题是季节性和水分来源。在这种情况下，我们打算详细研究两个主要的植被形成过程一般与季节性水分供应：（1）冰川侵蚀和沉积，这是高度敏感的时空趋势的水分输送，（2）滑坡和相关的过程，控制山坡衰退。该提案将分析1至104年的时间尺度和102至1010平方米的空间尺度上的地貌过程。首先，我们努力了解目前的天气湿度特征及其与当地地形的关系。我们将使用遥感的降雨量和积雪数据，结合对冰川速度和积雪深度的实地测量，每周到每年一次。这将辅之以实地观测和变化探测技术，利用过去40年的卫星图像时间序列，查明和量化沿着喜马拉雅气候梯度从山坡到河流流域的地貌变化。其次，我们将使用宇宙成因核素测年和地貌分析，以构建一个详细的年表的冰川和山坡过程中的一个关键区域的西北喜马拉雅山脉，位于主要水分来源之间的过渡。这将允许破译在印度季风系统的气候振荡过程中的侵蚀过程的相对影响。总的来说，我们希望提供急需的数据的水文预算的喜马拉雅山和侵蚀沉积物的来源。

One of the outstanding questions in (paleo)climate research in the Himalaya and the adjacent mountainous areas in Central Asia concerns seasonality and the source of moisture. In this context, we intend to study in detail two of the dominant landscape-shaping processes generally associated with seasonal moisture supply: (1) glacial erosion and deposition, which are highly sensitive to spatiotemporal trends in moisture transport, and (2) landslides and associated processes that control hillslope decay. This proposal will analyze geomorphic processes on 1 to 104 yrs timescales and on 102 to 1010 m2 spatial scales. First, we strive to understand the present¬day synoptic moisture characteristics and their relation to local topography. We will use remotely-sensed rainfall and snow-cover data combined with field measurements of glacial velocities and snow depths on a weekly to annual basis. This will be complemented by field observation and change-detection techniques from satelliteimagery time series of the last 4 decades to identify and quantify landscape changes from hillslope to river-basin scales along the climatic gradient of the Himalaya. Second, we will use cosmogenic nuclide dating and geomorphic analysis to construct a detailed chronology of glacial and hillslope processes in a key region of the NW Himalaya that lies in the transition between the main moisture sources. This will allow deciphering the relative influence of erosive processes during climatic oscillations in the Indian Monsoon system. Overall, we expect to provide much needed data on the hydrologic budget of the Himalaya and the provenance of eroded sediments.