JD
Member Since 2006
Joe Dufek
Professor, University of Oregon
AGU Research
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Density Stratification and Buoyancy Evolution in Pyroclastic Density Currents
JOURNAL OF GEOPHYSICAL RESEARCH: SOLID EARTH
21 june 2024
Sean O'Donnell, Eric Breard, James L. Buttles, Jos...
Pyroclastic density currents (PDCs) are density‐stratified along their vertical axis, with the near‐bed portion being denser than the u...
A Generalized Townsend's Theory for Paschen Curves in Planar, Cylindrical, and Spherical Geometries in Planetary Atmospheres
JOURNAL OF GEOPHYSICAL RESEARCH: ATMOSPHERES
08 april 2024
Jeremy Riousset, Joshua Mendez Harper, Josef Dufek...
In this work, we focus on plasma discharges produced between two electrodes with a high potential difference, resulting in the ionization of the ne...
Evolution of Magmatic Systems in Extensional Settings on Venus
VENUS EXPLORATION: SCIENCE AND TECHNOLOGY FOR EARTH’S HOTTER TWIN III ORAL
planetary sciences | 14 december 2023
Rudi Lien, Josef Dufek
Evidence for recent volcanism on Venus indicates that active sites are often spatially correlated with rift systems. Here, we investigate subsurface m...
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Discerning the Cause of Multi-Decadal Subsidence Across the Edifice at Medicine Lake Volcano using Sentinel-1 InSAR Deformation Time-Series, a Bayesian MCMC Model Framework, and a Stochastic Dike Emplacement Thermal Model
GLOBAL APPLICATIONS OF VOLCANO GEODESY IV ELIGHTNING
geodesy | 14 december 2023
Rebecca Bussard, Josef Dufek, Meredith Townsend, C...
Intereruptive deformation at volcanoes can provide useful insights into long-term processes at and beneath the surface. One volcano that has experienc...
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Constraining Near-Vent Conduit Conditions of Enceladus Cryovolcanic Jets
ENCELADUS: FROM INNER WORKINGS TO THE POTENTIAL FOR LIFE I POSTER
planetary sciences | 14 december 2023
Paul V. Regensburger, Josef Dufek, Carol S. Paty
The cryovolcanic plumes on Enceladus provide a unique window into interior processes both within and beneath the ice shell. The South Polar Terrain is...
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Evaluating the thermal-temporal evolution of the magma system at a stratovolcano: Comparing Holocene and Pleistocene rhyolites at South Sister Volcano, OR, USA, using zircon petrochronology
EVOLUTION OF TRANSCRUSTAL MAGMA PLUMBING SYSTEMS, VOLCANIC UNREST, AND ERUPTION STYLES: CHEMICAL, PHYSICAL, AND TEMPORAL PERSPECTIVES I POSTER
volcanology, geochemistry and petrology | 12 december 2023
Annika E. Dechert, Nathan L. Andersen, Josef Dufek
Zircon petrochronology utilized at large- and small-volume systems can distinguish chemical, thermal, spatial, and temporal characteristics of magmati...
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Deformation-Induced Thin Layer Stability: an Inspection into Compressibility and the Origins of Non-Local Effects in Granular Material
EXTREME VARIABILITY AND COMPLEXITY: BRIDGING THEORIES AND DATA-DRIVEN APPROACHES ACROSS SCALES, FROM URBAN GEOSCIENCES TO THE GEOSPACE III POSTER
nonlinear geophysics | 12 december 2023
Chris Harper, Josef Dufek, Eric Breard
Granular systems exhibit complex behavior such as self organized criticality, phase transitions, and non-local interactions. Despite such complexities...
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Spark and glow discharges in supersonic granular flows
TOPICS IN ATMOSPHERIC ELECTRICITY AND ADVANCES IN INSTRUMENTS AND METHODS II ORAL
atmospheric and space electricity | 11 december 2023
Joshua Mendez Harper, Clare Kimblin, Josef Dufek, ...
Supersonic granular flows often host spark and glow discharges. In nature, such phenomena re exemplified by the lightning storms that accompany volcan...
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