Antarctica's sedimentary basins and their influence on ice sheet dynamics
Antarctica's sedimentary basins and their influence on ice sheet dynamics
复制标题
南极洲沉积盆地及其对冰盖动力学的影响
DOI：
10.1002/essoar.10510905.2
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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
南极洲沉积盆地的知识建立了我们对构造、冰、海洋和气候的耦合演化的理解。沉积盆地的性质不同于影响冰盖动力学的基底主导区域，可能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是有限的。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。尽管如此，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，有助于对南极洲冰下环境有新的认识。在这里，我们总结了最近的进展，了解南极洲的沉积盆地。我们回顾了雷达、势场、地震和电磁技术在探测和表征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。这些新的能力允许对南极洲的沉积盆地及其特征进行全大陆范围的测绘，帮助确定该大陆的构造发展。至关重要的是，南极洲的沉积盆地通过动态反馈与覆盖的冰盖相互作用，这有可能导致冰盖的快速变化。展望未来，未来的研究方向包括在后勤限制范围内增加数据覆盖率的技术，以及解决主要的知识差距，包括冰盖床的采样不足和冰下盆地结构和地层的定义不佳。将沉积盆地过程的知识转化为冰盖建模研究对于加强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.