A5060088716- Planetary Science and Exploration
- Astro and Planetary Science
- Geology and Paleoclimatology Research
- Methane Hydrates and Related Phenomena
- Space Exploration and Technology
- Space Science and Extraterrestrial Life
- Paleontology and Stratigraphy of Fossils
- Spaceflight effects on biology
- Hydrocarbon exploration and reservoir analysis
- Marine and environmental studies
- Scientific Research and Discoveries
- Geological Modeling and Analysis
- Cancer Treatment and Pharmacology
- Space exploration and regulation
- Geological and Geochemical Analysis
- Dermatological and Skeletal Disorders
- Magnetic and Electromagnetic Effects
- Traumatic Ocular and Foreign Body Injuries
- Fluid Dynamics Simulations and Interactions
- Soft tissue tumors and treatment
- Arctic and Antarctic ice dynamics
- Heat and Mass Transfer in Porous Media
- Climate change and permafrost
- Scientific Computing and Data Management
- Augmented Reality Applications
Czech Academy of Sciences, Institute of Geophysics
2014-2024
Charles University
2013-2024
The Open University
2022-2024
University Hospital in Motol
2024
Czech University of Life Sciences Prague
2021-2022
Czech Academy of Sciences
2011-2022
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
2009
New spacecraft data provide increasing evidence for a dynamic environment on presentA¢Â�Â�day Mars. Exogenic processes such as impact cratering, mass wasting processes, and active dune migration have all been observed to modify the surface. No traces of current endogenic activity been found yet, but some studies point very localized volcanism in the last few millions years. However, no systematic study young volcanic surfaces had performed so far. We present absolute model age...
Abstract Hydrovolcanism is a common natural phenomenon on Earth and should be Mars, too, since its surface shows widespread evidence for volcanism near‐surface water. We investigate fields of pitted cones in the Nephentes/Amenthes region at southern margin ancient impact basin, Utopia, which were previously interpreted as mud volcanoes. The cone contain breached with associated outgoing flow‐like landforms. Based stratigraphic relations, we determined Hesperian or younger model age. test...
Abstract We analyze the shapes of 28 hypothesized scoria cones in three regions on Mars, i.e., Ulysses and Hydraotes Colles Coprates Chasma. Using available High‐Resolution Imaging Science Experiment Context Camera (CTX) digital elevation models, we determine basic morphometric characteristics estimate from ballistic modeling physical parameters volcanic eruptions that could have formed them. When compared to terrestrial cones, most studied show larger volumes (up 4.2 × 10 9 m 3 ), heights...
Abstract The southern part of the smooth plain Chryse Planitia on Mars hosts a large population kilometer‐sized (from ~0.2 to ~20 km) landforms spread over wide area. Based investigation small this area, Komatsu et al. (2016, https://doi.org/10.1016/j.icarus.2015.12.032 ) proposed that edifices may be result subsurface sediment mobilization. We mapped full extent these within and performed morphological spatial analysis in an attempt further test hypothesis. identified total number 1,318...
Many large-scale mud volcanoes (MVs) display kilometer-sized breccia flows that extend from the crater. These are assumed to be related intermittent episodic eruptive events characterize MV activity. However, only a few sufficiently long-lasting and voluminous eruptions have been documented considered able generate such extensive flows. Therefore, exact mechanisms promoting formation of long remain so far unclear.In September 2022, shortly after 11th August 2022 Lokbatan eruption in...
The formation of Tharsis affected nearly the entire western hemisphere Mars and had a profound effect on Martian geodynamics. Tharsis-related lithospheric deformation created variety tectonic structures that record past stress fields, some which may still be active today. However, evidence for very recent endogenic activity (
Abstract. Extensive fields of sub-kilometre- to kilometre-scale mounds, cones, domes, shields, and flow-like edifices cover large parts the martian lowlands. These features have been compared structures on Earth produced by sedimentary volcanism – a process that involves subsurface sediment/fluid mobilisation commonly releases methane atmosphere. It was proposed such processes might help explain presence in atmosphere may also habitable, settings potential astrobiological relevance. However,...
Abstract Subtle mounds have been discovered in the source areas of Martian kilometer‐sized flows and on top summit domes. These features suggested to be related subsurface sediment mobilization, opening questions regarding their formation mechanisms. Previous studies hypothesized that they mark position feeder vents through which mud was brought surface. Two theories proposed: (a) ascent more viscous during late stage eruption (b) expansion within conduit due instability water under...
Although most of the large volcanic landforms on Mars have been extensively studied, this is not case for kilometer-sized whose origin remains uncertain and which might provide important insights into evolution Martian volcanism. Previously, different populations small-scale putative scoria cone volcanoes described in Tharsis, specifically areas where heavily fractured crust Noachian- Hesperian-age escaped Amazonian resurfacing by younger lava flows. Therefore, we decided to explore a region...
Abstract Spacecraft data reveal that volcanism was active on Mercury. Evidence of large‐volume effusive and smaller‐scale explosive eruptions has been detected. However, only large (>~15 km) volcanic features or vents have found so far, despite abundant high‐resolution imagery. On other planets, the size volcanoes is anticorrelated with their frequency; small are much more numerous than ones. Here we present results a numerical model predicts shapes ballistically emplaced edifices hence...
Endogenic processes have greatly affected the Martian surface, especially concentrating at several volcano-tectonic centers. The formation of Tharsis, a vast volcanic bulge, significantly influenced western hemisphere Mars. associated loading stresses caused various sets tectonic structures that might remained active until today. However, surface evidence for very recent endogenic in Tharsis is sparse. Here, using Context Camera (CTX) and High Resolution Imaging Science Experiment (HiRISE)...
Abstract. Extensive fields of sub-kilometre-to kilometre-scale mounds, cones, domes, shields, and flow-like edifices cover large parts the martian lowlands. These features have been compared to structures on Earth produced by sedimentary volcanism – a process that involves subsurface sediment/fluid mobilization commonly releases methane atmosphere. It was proposed such might help explain presence in atmosphere also may additionally habitable, settings potential astrobiological relevance....