Data_Sheet_1_Geothermal Heat Flux in Antarctica: Assessing Models and Observations by Bayesian Inversion.PDF

• Main Authors: Mareen Lösing, Jörg Ebbing, Wolfgang Szwillus
• Format: Dataset
• Language: unknown
• Published: 2020
• Subjects: Solid Earth Sciences; Climate Science; Atmospheric Sciences not elsewhere classified; Exploration Geochemistry; Inorganic Geochemistry; Isotope Geochemistry; Organic Geochemistry; Geochemistry not elsewhere classified; Igneous and Metamorphic Petrology; Ore Deposit Petrology; Palaeontology (incl. Palynology); Structural Geology; Tectonics; Volcanology; Geology not elsewhere classified; Seismology and Seismic Exploration; Glaciology; Hydrogeology; Natural Hazards; Quaternary Environments; Earth Sciences not elsewhere classified; Evolutionary Impacts of Climate Change; heat flux; Bayesian inversion; Monte-Carlo; numerical modeling; Antarctica; Antarctic; Antarctic Peninsula; The Antarctic; Antarc*
• Online Access: https://doi.org/10.3389/feart.2020.00105.s001; https://figshare.com/articles/Data_Sheet_1_Geothermal_Heat_Flux_in_Antarctica_Assessing_Models_and_Observations_by_Bayesian_Inversion_PDF/12162000

Geothermal heat flux under the Antarctic ice is one of the least known parameters. Different methods (based on e.g., magnetic or seismic data) have been applied in recent years to quantify the thermal structure and the geothermal heat flux, resulting in vastly different estimates. In this study, we use a Bayesian Monte-Carlo-Markov-Chain approach to explore the consistency of such models and to which degree lateral variations of the thermal parameters are required. Hereby, we evaluate the input from different lithospheric models and how they influence surface heat flux. We demonstrate that both Curie isotherm and heat production are dominating parameters for the thermal calculation and that use of incorrect models or sparsely available data lead to unreliable results. As an alternative approach, geological information should be coupled with geophysical data analysis, as we demonstrate for the Antarctic Peninsula.