2010年至2023年期间,伊朗阿拉姆库赫冰川使用多时间高分辨率DEM的质量损失的演变
Neamat Karimi1, Sara Sheshangosht2
1Department of Water Resources Study and Research, Water Research Institute, Tehran, Iran. n.karimi@wri.ac.ir.
Environmental monitoring and assessment
|September 10, 2025
概括
与全球平均水平相比,阿拉姆库赫冰川的质量损失中等,近年来略有加速. 高分辨率数据显示了各种稀释速率,这些稀释速率受到诸如池和悬崖等超冰川特征的影响.
科学领域:
- 冰川学和遥感技术的发展
- 冰层科学 冰层科学
- 环境变化监测 环境变化监测
背景情况:
- 全球高山冰川正在经历大量的冰损失.
- 阿拉姆库赫冰川是伊朗和中东地区的主要冰川,需要对其最近的变化进行详细评估.
- 了解局部冰川动态对于区域气候影响研究至关重要.
研究的目的:
- 调查2010年至2023年间阿拉姆库赫冰川表面升高和质量损失的变化.
- 在研究时间框架内,分析三个不同的子时期的质量平衡趋势.
- 为了确定超冰川特征对冰川稀薄模式的影响.
主要方法:
- 利用2010年的高分辨率LiDAR数据进行初始的海拔测绘.
- 在2018年,2020年和2023年使用无人机 (UAV) 进行多时间调查.
- 计算了平均质量平衡,并分析了不同超冰层环境的海拔变化.
主要成果:
- 从2010年到2023年,Alamkouh冰川的平均质量平衡为每年 -0.20 ± 0.04米的水当量 (m w.e.a−1) ,与全球平均值 -0.5米 w.e.a−1.3相比,相当温和.
- 质量损失呈现轻微加速,分别为2010-2018,2018-2020年和2020-2023年为-0.18 ± 0.03,-0.24 ± 0.04和-0.25 ± 0.04m w.e.a-1的速度.
- 冰的最大损失发生在带有上冰期池 (-1.09 ± 0.35 m/a) 和冰崖 (-0.73 ± 0.25 m/a) 的地区,与没有碎片 (-0.64 ± 0.20 m/a) 和覆盖碎片 (-0.20 ± 0.24 m/a) 的地区形成鲜明对比.
结论:
- 阿拉姆科赫冰川的质量损失虽然中等,但表明对环境因素的复杂反应,特别是超冰川特征.
- 该研究强调了高分辨率无人机数据对于详细的冰川监测和变化分析的有效性.
- 持续监测和先进的建模对于预测未来的冰川行为及其影响至关重要.
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