热力耦合ice sheet模式中作为“滑动律”的浅陆棚近似
The shallow shelf approximation as a "sliding law" in a thermomechanically coupled ice sheet model
摘要：
对于冰盖模拟，浅陆棚近似是一种比基底速度是驱动应力函数的滑动律更好的“滑动律”。由\emph{Schoof} [2006 a]制定的浅大陆架近似非常适合这种用途。我们新的热力耦合滑动方案是基于一个塑性假设的强度的饱和直到下面的冰盖，直到屈服应力是由莫尔-库仑公式使用一个模拟的孔隙水压力。使用这种方案，我们的预报全冰盖模式具有令人信服的冰流。驱动应力部分由膜应力平衡，该模型可以并行地以高空间分辨率计算，它相对于参数变化是稳定的，并且它产生在实际冰流中看到的表面速度。
英文摘要：
The shallow shelf approximation is a better ``sliding law'' for ice sheet modeling than those sliding laws in which basal velocity is a function of driving stress. The shallow shelf approximation as formulated by \emph{Schoof} [2006a] is well-suited to this use. Our new thermomechanically coupled sliding scheme is based on a plasticity assumption about the strength of the saturated till underlying the ice sheet in which the till yield stress is given by a Mohr-Coulomb formula using a modeled pore water pressure. Using this scheme, our prognostic whole ice sheet model has convincing ice streams. Driving stress is balanced in part by membrane stresses, the model is computable at high spatial resolution in parallel, it is stable with respect to parameter changes, and it produces surface velocities seen in actual ice streams.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
