Antarctic ice rises and rumples: Their properties and significance for ice-sheet dynamics and evolution
Antarctic ice rises and rumples: Their properties and significance for ice-sheet dynamics and evolution
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DOI：
10.1016/j.earscirev.2015.09.004
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发表时间：
2015-11
影响因子：
12.1
通讯作者：
K. Matsuoka;R. Hindmarsh;G. Moholdt;M. J. Bentley;H. Pritchard;Joel Brown;H. Conway;R. Drews;G. Durand;D. Goldberg;T. Hattermann;J. Kingslake;J. Lenaerts;C. Martín;R. Mulvaney;K. Nicholls;F. Pattyn;N. Ross;T. Scambos;P. Whitehouse
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文献类型：
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作者：
K. Matsuoka;R. Hindmarsh;G. Moholdt;M. J. Bentley;H. Pritchard;Joel Brown;H. Conway;R. Drews;G. Durand;D. Goldberg;T. Hattermann;J. Kingslake;J. Lenaerts;C. Martín;R. Mulvaney;K. Nicholls;F. Pattyn;N. Ross;T. Scambos;P. Whitehouse
冰架上的局部接地特征，称为冰隆和冰褶，在支持南极冰盖的排放和调节其对海平面的贡献方面发挥着关键作用。冰隆通常比周围的冰架高出几百米;冰架流在它们周围转向。另一方面，冰架上的冰流过冰褶，冰褶通常只高出冰架几十米。冰隆包含了丰富的冰川消退和气候历史，从几千年到最后一次冰期最大期。数值模型结果表明，冰升和冰皱的支撑效应是显著的，但对过程的细节及其演变仍知之甚少。为了评估它们对冰盖行为的影响，需要关于引起浮动冰架、冰上升和冰褶皱之间过渡的条件和过程的基本信息。需要有针对性的高分辨率观测数据，以评价和改进预测性数值模型和小规模钉扎点对接地区动态影响的参数化。
Locally grounded features in ice shelves, called ice rises and rumples, play a key role buttressing discharge from the Antarctic Ice Sheet and regulating its contribution to sea level. Ice rises typically rise several hundreds of meters above the surrounding ice shelf; shelf flow is diverted around them. On the other hand, shelf ice flows across ice rumples, which typically rise only a few tens of meters above the ice shelf. Ice rises contain rich histories of deglaciation and climate that extend back over timescales ranging from a few millennia to beyond the last glacial maximum. Numerical model results have shown that the buttressing effects of ice rises and rumples are significant, but details of processes and how they evolve remain poorly understood. Fundamental information about the conditions and processes that cause transitions between floating ice shelves, ice rises and ice rumples is needed in order to assess their impact on ice-sheet behavior. Targeted high-resolution observational data are needed to evaluate and improve prognostic numerical models and parameterizations of the effects of small-scale pinning points on grounding-zone dynamics.