کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6922743 865105 2014 18 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Estimating the ice thickness of shallow glaciers from surface topography and mass-balance data with a shape optimization algorithm
ترجمه فارسی عنوان
برآورد ضخامت یخ یخچال های سطحی از توپوگرافی سطح و داده های تعادل جرم با الگوریتم بهینه سازی شکل
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
چکیده انگلیسی
A shape optimization algorithm is presented that estimates the ice thickness distribution within a three-dimensional, shallow glacier, given a transient surface geometry and a mass-balance distribution. The approach is based on the minimization of the surface topography misfit in the shallow ice approximation by means of a primal-dual procedure. The method׳s essential novelty is that it uses surface topography and mass-balance data only within the context of a time-dependent problem with evolving surface topography. Moreover, the algorithm is capable of computing some of the model parameters concurrently with the ice thickness distribution. The method is validated on synthetic and real-world data, where the choice of its Tikhonov regularization parameter by means of an L-curve criterion is discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computers & Geosciences - Volume 66, May 2014, Pages 182-199
نویسندگان
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