A sensitivity study of fast outlet glaciers to short timescale cyclical perturbations
A sensitivity study of fast outlet glaciers to short timescale cyclical perturbations
复制标题
快速流出冰川对短时间尺度周期性扰动的敏感性研究
DOI：
10.5194/tcd-9-223-2015
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
T. Dupont
中科院分区：
文献类型：
--
作者：
E. Aykutlug;T. Dupont
抽象的。出口冰川在短时间尺度（年至十年）上的动态响应受到各种外部强迫的影响，如基底或海洋条件。了解这种强迫的动态响应的敏感性，可以帮助评估更准确的冰量预测。在这项工作中，我们调查的时空敏感性出口冰川快速周期强迫使用一维深度和宽度平均启发式模型。我们的研究结果表明，即使在这样短的时间尺度上，冰动力学的非线性可能会导致一个不对称的响应，尽管强迫函数是对称的每个参考值。结果还表明，随着冰川越来越接近漂浮，这种短期效应变得更加明显。虽然在性质上类似的下坡和上坡床的几何形状，结果表明更高的灵敏度上坡（“西舌云母”）床。不同配置的非对称响应范围激励参数化或包括模型中的短时间尺度效应，同时调查出口冰川的动态行为。
Abstract. The dynamic response of outlet glaciers on short (annual to decadal) timescales is affected by various external forcings, such as basal or oceanic conditions. Understanding the sensitivity of the dynamic response to such forcings can help assess more accurate ice volume projections. In this work, we investigate the spatiotemporal sensitivity of outlet glaciers to fast cyclical forcings using a one-dimensional depth and width-averaged heuristic model. Our results indicate that even on such short timescales, nonlinearities in ice dynamics may lead to an asymmetric response, despite the forcing functions being symmetric around each reference value. Results also show that such short-timescale effects become more pronounced as glaciers become closer to flotation. While being qualitatively similar for both downsloping and upsloping bed geometries, the results indicate higher sensitivity for upsloping ("West Antarctica-like") beds. The range in asymmetric response for different configurations motivate parameterizing or including short-timescale effects in models while investigating the dynamic behavior of outlet glaciers.
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影响因子：
2.9
作者：
G. Durand;O. Gagliardini;T. Zwinger;E. L. Meur;R. Hindmarsh
通讯作者：
G. Durand;O. Gagliardini;T. Zwinger;E. L. Meur;R. Hindmarsh
DOI：
10.5194/tc-4-605-2010
发表时间：
2010-12
期刊：
The Cryosphere
影响因子：
--
作者：
R. Gladstone;A. Payne;S. Cornford
通讯作者：
R. Gladstone;A. Payne;S. Cornford
影响因子：
5.2
作者：
Gudmundsson, G. H.;Krug, J.;Gagliardini, O.
通讯作者：
Gagliardini, O.
影响因子：
5.2
作者：
Gudmundsson, G. H.
通讯作者：
Gudmundsson, G. H.