岩室对冰卸载的反应:西南极裂系统中火山活动的应用
A N Coonin1, C Huber1, J Troch2
1Department of Earth, Environmental, and Planetary Sciences Brown University Providence RI USA.
概括
西南极冰盖下面的火山活动可以加速融化. 冰损失会改变岩系统,可能增加火山爆发,进一步破坏冰盖的稳定.
科学领域:
- 地质物理学 地质物理学
- 冰川学的冰川学
- 火山学 火山学是一门学科.
背景情况:
- 在冰盖附近的火山爆发会导致冰层融化.
- 融化的冰盖降低了地压力,影响了底层的岩系统.
- 在安第斯山脉中观察到冰川和火山运动之间的正反循环.
研究的目的:
- 为了研究冰块卸载对西南极洲冰下火山活动的影响.
- 模拟降低冰荷载对岩室动态和喷发行为的影响.
- 评估火山与冰的相互作用如何影响冰盖的稳定性和海平面上升.
主要方法:
- 调整了一个热力学岩模型.
- 通过降低石静压来模拟缩小的冰载荷.
- 研究了不同的卸载速度及其对岩挥发性分离和喷发轨迹的影响.
主要成果:
- 冰的卸载速度显著影响了喷发的累积质量.
- 卸载影响到释放到冰盖中的热量.
- 西南极洲的冰下火山活动对冰盖动态敏感.
结论:
- 西南极洲的火山冰相互作用是复杂的,双向的.
- 卸载触发的火山活动可能会导致冰损失预测的不确定性.
- 了解这些过程对于准确预测海平面上升至关重要.
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