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Inverse Level-set Problems for Capturing Calving Fronts

Abele, Daniel and Basermann, Achim and Bungartz, Hans-Joachim and Humbert, Angelika (2023) Inverse Level-set Problems for Capturing Calving Fronts. In: 11th Applied Inverse Problems Conference. 11th Applied Inverse Problems Conference, 2023-09-04 - 2023-09-08, Göttingen, Germany.

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Abstract

Capturing the calving front motion is critical for simulations of ice sheets and ice shelves. Multiple physical processes - besides calving also melting and the forward movement of the ice - need to be understood to accurately model the front. Calving is particularly challenging due to its discontinuous nature and modelers require more tools to examine it. A common technique for capturing the front in ice simulations is the Level-set method. The front is represented implicitly by the zero isoline of a function. The movement of the front is described by an advection equation, where the velocity field is a combination of ice velocity and frontal ablation rate. To improve understanding of these processes, we are developing methods to estimate parameters of calving laws based on inverse Level-Set problems. The regularization is chosen so it can handle discontinuous parameters or calving laws to fit discontinuous front positions due to large calving events. The input for the inverse problem is formed by observational data from satellite images that is often sparse. The methods will be applied to large scale models of the Antarctic Ice Sheet.

Item URL in elib:https://elib.dlr.de/199938/
Document Type:Conference or Workshop Item (Poster)
Title:Inverse Level-set Problems for Capturing Calving Fronts
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Abele, DanielUNSPECIFIEDhttps://orcid.org/0000-0001-7021-1573148257478
Basermann, AchimUNSPECIFIEDhttps://orcid.org/0000-0003-3637-3231148257479
Bungartz, Hans-JoachimTechnical University of Munich, School of Computation, Information and Technology, Munich, GermanyUNSPECIFIEDUNSPECIFIED
Humbert, AngelikaAlfred Wegener Institute Helmholtz Institute for Polar and Marine Research, Bremerhaven, GermanyUNSPECIFIEDUNSPECIFIED
Date:September 2023
Journal or Publication Title:11th Applied Inverse Problems Conference
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Inverse Problem, Level-set Method, Ice Sheet Model, Calving
Event Title:11th Applied Inverse Problems Conference
Event Location:Göttingen, Germany
Event Type:international Conference
Event Start Date:4 September 2023
Event End Date:8 September 2023
Organizer:Inverse Problems International Association (IPIA)
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space System Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Space System Technology
DLR - Research theme (Project):R - HPDA support DFD
Location: Oberpfaffenhofen
Institutes and Institutions:Institute for Software Technology > High-Performance Computing
Institute for Software Technology
Deposited By: Abele, Daniel
Deposited On:07 Dec 2023 13:44
Last Modified:24 Apr 2024 21:00

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