Lakes on the Tibetan Plateau (TP) are sensitive indicators of climate change due to minimal disturbance by human activities. Estimations of lake water levels and storage variations on the TP are essential in evaluating water resources and modeling hydrologic processes in high-altitude endorheic basins. By integrating the ICESat/ICESat-2, Global Surface Water dataset, and HydroLAKES dataset, this study puts forward plateau-scale research of lake level changes and further estimates water storage changes on the TP during 2003–2019. The number of lakes observed by ICESat-2 is nearly three times as large as that by ICESat. There are 242 lakes over 1 km² that can be observed by combining both ICESat and ICESat-2. These lakes with available data present a mean water-level change rate of 0.20 ± 0.04 m/yr in 2003–2019. A total water storage change of 11.51 ± 2.26 Gt/yr for all lakes on the TP is estimated by combining the two-generation spaceborne laser altimetry missions. Besides, water-level change rates of the inner TP lakes during the ICESat era (2003–2009) and joint mission period (2003–2019) are compared to analyze the spatio-temporal variation characteristics of these lakes. The lakes of the inner TP show average rates of water-level change in two periods are 0.20 ± 0.05 m/yr and 0.26 ± 0.03 m/yr, respectively. The examination of water vapor transport over the inner TP indicates that the accelerated water-level rises in the northern TP, yet deceleration in the southern part may be tightly related to the stronger water vapor transport in the north.

由于人类活动造成的最小干扰，青藏高原上的湖泊是气候变化的敏感指标。TP上湖泊水位和储量变化的估算对于评估高海拔背胶盆地的水资源和模拟水文过程至关重要。通过整合ICESat / ICESat-2，全球地表水数据集和HydroLAKES数据集，这项研究提出了湖泊水位变化的高原规模研究，并进一步估计了2003-2019年TP上的储水量变化。ICESat-2观测到的湖泊数量几乎是ICESat观测到的湖泊数量的三倍。超过1公里²有242个湖泊可以将ICESat和ICESat-2结合起来观察到这一点。这些拥有可用数据的湖泊在2003–2019年的平均水位变化率为0.20±0.04 m / yr。通过结合两代星载激光测高任务，估计TP上所有湖泊的总储水量变化为11.51±2.26 Gt / yr。此外，比较了ICESat时代（2003-2009年）和联合任务时期（2003-2019年）内TP湖的水位变化率，以分析这些湖的时空变化特征。内部TP的湖泊显示两个时期的平均水位变化率分别为0.20±0.05 m / yr和0.26±0.03 m / yr。对内部TP上水汽输送的研究表明，北部TP的加速水位上升，