由冰川融化和气候变化驱动的湖泊脉冲
Songtao Ai1,2,3,4, Shoukat Ali Shah5,6, Yi Cai5
1Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan, 430079, China. ast@whu.edu.cn.
Scientific reports
|December 31, 2024
概括
蓝月亮湖谷的冰川融化动态显示出水位的大幅波动,受温度和降水的影响. 这项研究为冰川养地区提供了对水的可用性和气候适应策略的见解.
科学领域:
- 冰川学和水文学
- 气候变化科学 气候变化科学
- 环境建模环境建模
背景情况:
- 西藏高原的冰川对于淡水和气候调节至关重要,作为气候变化的敏感指标.
- 了解冰川供水的水文系统对于水资源管理和气候适应计划至关重要.
- 蓝月亮湖谷 (BMLV),由拜河冰川号灌. 1,经历微妙但显著的水位波动 (湖脉动现象).
研究的目的:
- 为了研究蓝月亮湖谷水位的动态波动.
- 分析冰川融化动态,气候变量和水文反应之间的相互作用.
- 量化湖泊脉冲现象及其驱动因素.
主要方法:
- 采用快速里埃转换 (FFT),多变量回归 (MVR) 和随机森林 (RF) 模型.
- 分析了水位数据,冰川融化速度和关键气候变量 (温度,太阳辐射,降水等). ) 的情况.
- 水平和冰川融化的计算变化率 (ROC),累计总和 (CS) 和过境时间.
主要成果:
- 水平ROC波动在-0.006和0.01米/分钟之间,中位数为-7.24E-06米/分钟,受冰川融化和降水的影响.
- 0.09米的最大CS表明,由于降水,蒸发减少和冰川融化增加,净水位上升.
- 温度是影响冰川融化和水位的关键因素;融化峰值每2.87小时发生一次,而水位峰值每6.5小时发生一次,融水过渡时间为4.16小时.
结论:
- 该研究系统地阐明了BMLV的水文动态,突出了冰川融化和气候变量的重大影响.
- 这些发现强调了考虑微妙的水文波动对于准确的水资源评估的重要性.
- 这项研究为依赖冰川的地区的水资源管理,生态系统健康和气候变化适应提供了关键数据.
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