Advancing Permafrost Monitoring With Autonomous Electrical Resistivity Tomography (A-ERT):Low-Cost Instrumentation and Open-Source Data Processing Tool

• Published in: Geophysical Research Letters
• Main Authors: Farzamian, M., Blanchy, G., McLachlan, P., Vieira, G., Esteves, M., de Pablo, M. A., Triantifilis, J., Lippmann, E., Hauck, C.
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2024
• Subjects: active layer monitoring; autonomous electrical resistivity tomography; open-source data processing tool; permafrost; Active layer monitoring; Antarc*; Antarctica
• Online Access: https://pure.au.dk/portal/en/publications/c01d8afe-c4ed-4e23-bee2-3f55e173bc09; https://doi.org/10.1029/2023GL105770

Permafrost is a widespread phenomenon in the cold regions of the globe and is under-represented in global monitoring networks. This study presents a novel low-cost, low-power, and robust Autonomous Electrical Resistivity Tomography (A-ERT) monitoring system and open-source processing tools for permafrost monitoring. The processing workflow incorporates diagnostic and filtering tools and utilizes open-source software, ResIPy, for data inversion. The workflow facilitates quick and efficient extraction of key information from large data sets. Field experiments conducted in Antarctica demonstrated the system's capability to operate in harsh and remote environments and provided high-temporal-resolution imaging of ground freezing and thawing dynamics. This data set and processing workflow allow for a detailed investigation of how meteorological conditions impact subsurface processes. The A-ERT setup can complement existing monitoring networks on permafrost and is suitable for continuous monitoring in polar and mountainous regions, contributing to cryosphere research and gaining deeper insights into permafrost and active layer dynamics.