An energy conserving method for simulating heat transfer in permafrost with hybrid modeling

• Main Authors: Groenke, Brian, Miesner, Frederieke, Langer, Moritz, Gallego, Guillermo, Boike, Julia
• Format: Conference Object
• Language: unknown
• Published: 2022
• Subjects: Climate change; permafrost
• Online Access: https://epic.awi.de/id/eprint/56218/; https://hdl.handle.net/10013/epic.4508bd1f-6125-48a2-9e28-51f8276cf2d8

Rapid climate change has lead to widespread warming of land surface temperatures throughout the Arctic, thereby accelerating the thawing of perennially frozen, carbon-rich soil, most commonly referred to as permafrost. Subsurface modeling of heat and water transport plays a key role in understanding how past, present, and future changes in the climate affect the rate and extent of permafrost thaw. We propose a novel hybrid modeling approach for solving by reparameterizing it as a universal partial differential equation, where the inverse enthalpy operator is represented by a universal approximator. Such a method would alleviate one of the major numerical difficulties in the simulation of two-phase heat transport and would allow for efficient and flexible modeling of permafrost at large time scales.