A tutorial on the use of control methods in ice-sheet modeling
A tutorial on the use of control methods in ice-sheet modeling
复制标题
DOI：
10.3189/s0022143000015744
复制
发表时间：
1993
影响因子：
3.4
通讯作者：
D. Macayeal
中科院分区：
文献类型：
--
作者：
D. Macayeal
控制方法被推荐为估计未确定物理参数和边界条件的有效手段，这样做可以提高给定冰盖流动模型对特定冰盖速度观测的保真度。为了完成这项任务，模型的底层动态是颠倒的。这允许根据模型/观测不拟合来明确地表示模型调优调整。与常用的试错技术相比，控制方法的优点是：(1)它很容易自动化，几乎没有额外的编程工作，(2)它所获得的调谐参数和边界条件保证在模型和观测之间提供最佳的拟合，(3)它量化了调谐参数和边界条件在它们不是唯一确定的情况下的不确定性。
Abstract Control methods are recommended as an efficient means to estimate undetermined physical parameters and boundary conditions and, in so doing, to improve the fidelity of a given ice-sheet flow model to specific ice-sheet velocity observations. To accomplish this task, the underlying dynamics of the model are inverted. This permits model-tuning adjustments to be represented explicitly in terms of model/observation misfit. Advantages of the control method over trial-and-error techniques in common use are: (1) it is readily automated with little additional programming effort, (2) the tuning parameters and boundary conditions it achieves are assured to give the best possible fit between model and observation, and (3) it quantifies the uncertainty of tuning parameters and boundary conditions in situations where they are not uniquely determined.