Lanzhou Institute of Arid Meteorology, Chinese Meteorological Administration, Gansu Province Key Laboratory of Arid Climate Change and Reducing Disaster, China; Meteorological Administration Key Laboratory of Arid Climate Change and Reducing Disaster, Lanzhou 730020, China; Lanzhou Regional Climate Center, Lanzhou 730020, China.
Lanzhou Institute of Arid Meteorology, Chinese Meteorological Administration, Gansu Province Key Laboratory of Arid Climate Change and Reducing Disaster, China; Meteorological Administration Key Laboratory of Arid Climate Change and Reducing Disaster, Lanzhou 730020, China.
Sci Total Environ. 2023 Oct 1;893:164959. doi: 10.1016/j.scitotenv.2023.164959. Epub 2023 Jun 16.
The Qilian Mountains provide an ecological security barrier, and the region is an important river runoff area in China. Water resources play an essential role in the natural environment of Northwest China. This study used daily temperature and precipitation data from meteorological stations in the Qilian Mountains from 2003 to 2019, Gravity Recovery and Climate Experiment, and Moderate Resolution Imaging Spectroradiometer satellite data. Additionally, we used the Gravity Recovery and Climate Experiment satellite's monthly gravity field model data. Furthermore, we analyzed the characteristics of climate warming and humidification in the eastern, central, and western sections of the Qilian Mountains based on spatial precipitation interpolation and linear trend analysis. Finally, we examined the relationship between water storage changes and precipitation and its impact on vegetation ecology. The results revealed a significant warming and humidification trend in the western Qilian Mountains. The temperature increased significantly, and the increased precipitation rate in summer reached 1.5-3.1 mm/10a. Water storage in the Qilian Mountains displayed an increasing trend, with an increase of approximately 14.3 × 10 m over the 17 years study period, averaging an increase of 8.4 mm/year. The spatial distribution of water storage in the Qilian Mountains increased from north to south and east to west. There were noticeable seasonal differences, with the largest surplus occurring in the western Qilian Mountains (71.2 mm in summer). The fractional vegetation coverage in 95.2 % of the western Qilian Mountains and net primary productivity in 90.4 % of the area displayed an increasing trend, and vegetation ecology improved significantly. This study aims to investigate the characteristics of ecosystem and water storage changes in the Qilian Mountain area under the background of climate warming and humidification. The results obtained from this study provided an assessment of the vulnerability of alpine ecosystems and helped in making spatially explicit decisions for the rational utilization of water resources.
祁连山提供了生态安全屏障，是中国重要的河流径流出区。水资源在中国西北地区的自然环境中起着至关重要的作用。本研究使用了 2003 年至 2019 年祁连山区气象站的逐日温度和降水数据、重力恢复与气候实验以及中等分辨率成像光谱仪卫星数据。此外，我们还使用了重力恢复与气候实验卫星的月重力场模型数据。我们基于空间降水插值和线性趋势分析，分析了祁连山东西段气候变暖增湿特征，探讨了降水及其对植被生态的影响。结果表明，祁连山西部地区存在显著的增暖增湿趋势。气温显著升高，夏季降水增加率达到 1.5-3.1mm/10a。祁连山水储量呈增加趋势，17 年研究期间增加了约 14.3×10^8m，平均每年增加 8.4mm。祁连山水储量的空间分布从北向南、从东向西增加。存在明显的季节性差异，西部祁连山的盈余量最大（夏季为 71.2mm）。祁连山西部地区 95.2%的分叶植被覆盖率和 90.4%的净初级生产力呈增加趋势，植被生态显著改善。本研究旨在探讨气候变暖增湿背景下祁连山地区生态系统和水储量变化的特征。本研究结果为评估高山生态系统的脆弱性提供了依据，并有助于对水资源进行合理利用的空间决策。
