Antarctica's subglacial sedimentary basins and their influence on ice-sheet change
Antarctica's subglacial sedimentary basins and their influence on ice-sheet change
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南极冰下沉积盆地及其对冰盖变化的影响
DOI：
10.1002/essoar.10510905.1
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发表时间：
2022
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
建立南极洲沉积盆地的知识，发展我们对构造，冰，海洋和气候的耦合演化的理解。与非盆地地区相比，沉积盆地有35个不同的冰下特性，这些特性会影响冰盖动态，并可能影响未来的冰盖变化。36.尽管如此重要，但我们对南极沉积盆地的了解有限。偏远，严酷的表面环境，覆盖的冰盖，边缘冰架和海冰都使野外工作具有挑战性。38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。数据处理和分析方面的平行进展也支持对南极洲冰下环境的新的深入了解。在这里，我们总结了41了解南极洲的沉积盆地的最新进展。我们回顾了雷达技术能力的进展，42个潜在的领域，地震和电磁技术来探测和表征冰下盆地。此外，我们还回顾了综合多数据解释的进展，包括新兴的机器学习方法。这些新的能力使得能够对南极洲的沉积盆地及其特征进行新的全大陆测绘，帮助确定该大陆的构造发展。至关重要的是，46南极洲的沉积盆地通过关键的动态反馈与覆盖的冰盖相互作用，47有可能促成冰盖的快速变化。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面，并解决主要的知识差距，包括冰盖床采样不足和冰下盆地结构和地层学定义不佳。50将沉积盆地过程的知识转化为冰盖模型研究，51对于加强预测未来变化的能力至关重要。52
Building a knowledge of Antarctica’s sedimentary basins develops our understanding of the coupled 34 evolution of tectonics, ice, ocean, and climate. In comparison to non-basin regions, sedimentary basins have 35 distinct subglacial properties that impact ice sheet dynamics and may influence future ice sheet change. 36 Despite this importance, our knowledge of Antarctic sedimentary basins is restricted. Remoteness, the harsh 37 surface environment, the overlying ice sheet, fringing ice shelves and sea ice all make fieldwork challenging. 38 Nonetheless, in the past decade the geophysics community has made great progress in internationally 39 coordinated data collection and compilation. Parallel advances in data processing and analysis also support a 40 new level of insight into Antarctica’s subglacial environment. Here, we summarize recent progress in 41 understanding Antarctica’s sedimentary basins. We review advances in the technical capability of radar, 42 potential fields, seismic and electromagnetic techniques to detect and characterize basins beneath ice. In 43 addition, we review advances in integrated multi-data interpretation including emerging machine learning 44 approaches. These new capabilities permit a new continent-wide mapping of Antarctica’s sedimentary 45 basins and their characteristics, aiding definition of the tectonic development of the continent. Crucially, 46 Antarctica’s sedimentary basins interact with the overlying ice sheet through key dynamic feedbacks that 47 have the potential to contribute to rapid ice sheet change. Looking ahead, future research directions include 48 increasing data coverage within logistical constraints, and resolving major knowledge gaps, including 49 insufficient sampling of the ice sheet bed and poor definition of subglacial basin structure and stratigraphy. 50 Translating the knowledge of sedimentary basin processes into ice sheet modelling studies is critical to 51 underpin better capacity to predict future change. 52