A5011188512- Meteorological Phenomena and Simulations
- Atmospheric aerosols and clouds
- Ionosphere and magnetosphere dynamics
- Climate variability and models
- Atmospheric Ozone and Climate
- Atmospheric chemistry and aerosols
- Tropical and Extratropical Cyclones Research
- Ion-surface interactions and analysis
- Earthquake Detection and Analysis
- Geology and Paleoclimatology Research
- Solar and Space Plasma Dynamics
- Planetary Science and Exploration
- Plasma Diagnostics and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Silicon and Solar Cell Technologies
- Tree-ring climate responses
- Nuclear Physics and Applications
- Spacecraft Design and Technology
- History and Developments in Astronomy
- Copper Interconnects and Reliability
- Radiation Effects in Electronics
- Reservoir Engineering and Simulation Methods
- Botanical Research and Applications
- Metal and Thin Film Mechanics
- Cryospheric studies and observations
Czech Hydrometeorological Institute
1996-2025
Czech Technical University in Prague
1975-1992
Significance As an unforeseen windfall of its high sensitivity, the Day/Night Band (DNB) low-light visible sensor carried on Suomi satellite enables global detection gravity waves in upper atmosphere at unprecedented subkilometric detail. On moonless nights, observations provide all-weather viewing as they modulate nightglow layer located near mesopause. These are launched by a variety mechanisms ranging from orography to convection, intensifying fronts, and seismic volcanic events. Wave...
Abstract On July 24, 2023, the new European record for hail size was set in northeast (NE) Italy with a 19‐cm wide hailstone recorded during supercell outbreak. During this event, severe storms were triggered Alps, moved eastward, intensified rapidly foothills, and generated damaging hailstorms plains. A detailed analysis of available observations numerical simulations highlights that atmospheric environment unusual. high‐ tongue over Adriatic Sea lifted by southerly flow above cold pool...
Multispectral, high-resolution imagery from the Advanced Very High Resolution Radiometer of NOAA polar orbiting satellites is used to analyze cloud-top structure convective storms that develop a cirrus feature above anvil, referred as plume, whose origin remains unclear. Images radiometer's channels 2, 3, and 4 combination any two these suggest relationship between emergence such plumes source small ice particles (diameter around 3.7 µm, channel 3 wavelength) at cloud top. Unique...
Abstract Gullwing‐shaped cirrus layers are observed on an image above a severe thunderstorm occurred in Argentina taken by the instrument CALIOP board of CALIPSO satellite. The extended into level stratosphere even higher than above‐anvil plumes that had been studied previously. This paper utilized cloud model simulation results similar storm to explain formation such gullwing cirrus. It is shown these can form from moisture transported upward successive internal gravity wave breaking at...
One of the most energetic bolide events in recent decades was detected by US Government sensors (USGS) over remote areas Bering Sea on December 18, 2018, 23:48 UT. No ground-based optical observations exist. Using satellite imagery dust trail left behind bolide, we tried to reconstruct trajectory. In combination with speed reported USGS, computed pre-atmospheric orbit. Observations various spectral bands from 0.4 13.3 microns enabled us study properties. Images and its shadow obtained angles...
Abstract We report on estimates of the vertical flux horizontal momentum associated with an extensive and bright mesospheric gravity wave event that occurred over El Leoncito Observatory, Argentina (31.8°S, 69.3°W), during night 17–18 March 2016. Using a combination ground‐based space‐based data sources, we propose was generated by large distant thunderstorm complex located to southeast observation site. The nightglow, including structures, easily visible naked eye observers, phenomenon...
Mesoscale convective systems are effective sources of atmospheric disturbances that can reach ionospheric heights and significantly alter conditions. Convective affect the Earth’s atmosphere on a continental scale up to F-layer heights. Extratropical cyclone “Zyprian” occurred at beginning July, 2021 dominated weather over whole Europe. An extensive cold front associated with moved from western part eastern Europe, followed by ground-level convergence formation organized thunderstorm...