Antarctic sedimentary basins and their influence on ice sheet dynamics
Antarctic sedimentary basins and their influence on ice sheet dynamics
复制标题
南极沉积盆地及其对冰盖动力学的影响
DOI：
10.1002/essoar.10510905.3
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Aitken A
中科院分区：
文献类型：
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作者：
Aitken A
对南极洲沉积盆地的了解有助于我们理解构造、冰、海洋和气候的耦合演化。沉积盆地具有不同于以基底为主的地区的性质，这些地区影响着冰盖的动力学，可能会影响未来的冰盖变化。尽管它们很重要，但我们对南极沉积盆地的了解有限。偏远、恶劣的环境、覆盖的冰盖、冰架和海冰都使野外工作具有挑战性。然而，在过去十年中，地球物理学界在国际协调的数据收集和汇编方面取得了很大进展，同时在数据处理和分析方面也取得了进展，这支持了对南极洲冰下环境的新认识。在这里，我们总结了在了解南极洲沉积盆地方面的最新进展。我们回顾了雷达、势场、地震和电磁技术探测和描述冰下盆地的技术能力方面的进展，以及包括机器学习方法在内的综合多数据解释方面的进展。这些新的能力使得能够在整个大陆范围内绘制南极洲沉积盆地及其特征的地图，有助于定义该大陆的构造发展。至关重要的是，南极洲的沉积盆地通过动态反馈与上覆冰盖相互作用，这可能有助于冰盖的快速变化。展望未来，未来的研究方向包括在后勤限制下增加数据覆盖面的技术，以及解决主要知识差距，包括对冰盖床采样不足和冰下盆地结构和地层定义不清。将沉积盆地过程的知识转化为冰盖模型研究，对于更好地预测未来变化的能力至关重要。
Knowledge of Antarctica's sedimentary basins builds our understanding of the coupled evolution of tectonics, ice, ocean, and climate. Sedimentary basins have properties distinct from basement‐dominated regions that impact ice‐sheet dynamics, potentially influencing future ice‐sheet change. Despite their importance, our knowledge of Antarctic sedimentary basins is restricted. Remoteness, the harsh environment, the overlying ice sheet, ice shelves, and sea ice all make fieldwork challenging. Nonetheless, in the past decade the geophysics community has made great progress in internationally coordinated data collection and compilation with parallel advances in data processing and analysis supporting a new insight into Antarctica's subglacial environment. Here, we summarize recent progress in understanding Antarctica's sedimentary basins. We review advances in the technical capability of radar, potential fields, seismic, and electromagnetic techniques to detect and characterize basins beneath ice and advances in integrated multi‐data interpretation including machine‐learning approaches. These new capabilities permit a continent‐wide mapping of Antarctica's sedimentary basins and their characteristics, aiding definition of the tectonic development of the continent. Crucially, Antarctica's sedimentary basins interact with the overlying ice sheet through dynamic feedbacks that have the potential to contribute to rapid ice‐sheet change. Looking ahead, future research directions include techniques to increase data coverage within logistical constraints, and resolving major knowledge gaps, including insufficient sampling of the ice‐sheet bed and poor definition of subglacial basin structure and stratigraphy. Translating the knowledge of sedimentary basin processes into ice‐sheet modeling studies is critical to underpin better capacity to predict future change.