概括
南极冰盖体积流量超过了伯德站附近的平衡率,这表明其显著稀释. 这种冰盖失衡可能始于威斯康星/维尔姆冰期之后,影响了冰盖的稳定性.
科学领域:
- 冰川学的冰川学
- 南极洲的研究研究.
- 冰盖的动态 冰盖的动态
背景情况:
- 计算冰盖体积流量对于理解质量平衡至关重要.
- 之前使用氧同位素和钻井温度的研究表明,伯德站的稀释.
研究的目的:
- 通过比较体积流与表面积累速度来评估冰盖的平衡.
- 在南极洲伯德站附近调查计算流量和积累之间的差异.
主要方法:
- 从伯德站到当地的冰区进行了一次穿越.
- 在横梁的各个点计算平均冰体积流量.
- 将体积流量数据与上游表面积累率进行比较.
主要成果:
- 南极冰盖似乎在冰区附近处于平衡状态.
- 在伯德站附近,计算的冰体积流量至少超过了15%的平衡所需的速度.
- 这种差异表明冰盖质量的潜在失衡.
结论:
- 观察到的不平衡最有可能的解释是正在进行的冰盖薄化,与之前的钻井数据一致.
- 这种稀薄事件很可能是在威斯康星/维尔姆冰川之后开始的.
- 进一步调查这种稀释的原因是有必要的.
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