Results 21 to 30 of about 128 (109)

X-ray Observations at Gaisberg Tower

Atmosphere, 2018
We report the occurrence of X-rays at ground level due to cloud-to-ground flashes of upward-initiated lightning from Gaisberg Tower, in Austria, which is located at an altitude of 1300 m.
Pasan Hettiarachchi, Vernon Cooray, Gerhard Diendorfer, Hannes Pichler, Joseph Dwyer, Mahbubur Rahman   +5 more
doaj   +1 more source

Observations on Electromagnetic and X-ray Radiations from Leader-return-stroke Process in Rocket-triggered Lightning

应用气象学报
The negative dart leader-return-stroke process, accompanied by broadband electromagnetic radiation and high-energy emissions, represents a key focus in lightning physics. During the summer of 2023, collaborative observations of rocket-triggered lightning
Li Xiao, Zhang Xiong, Li Peng, Fan Yanfeng, Wang Yuan, Li Xiaoqiang, Cao Baofeng, Lü Weitao   +7 more
doaj   +1 more source

Upgraded Low-Frequency 3D Lightning Mapping System in North China and Observations on Lightning Initiation Processes

Remote Sensing
The three-dimensional (3D) low-frequency lightning mapping system (LF-LMS) in north China has been updated. The lightning electric field derivative (dE/dt) sensor and continuous acquisition mode has been newly designed to ensure a capability of entire ...
Mingyuan Liu, Xiushu Qie, Zhuling Sun, Rubin Jiang, Hongbo Zhang, Ruiling Chen, Shanfeng Yuan, Yu Wang, Xiangke Liu   +8 more
doaj   +1 more source

Downward Positive Leader Propagation Modes and Their Effects in Positive Cloud‐to‐Ground Lightning Characteristics

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 9, 16 May 2026.
Abstract The return stroke in a cloud‐to‐ground (CG) flash is initiated when the downward leader either reaches the ground or connects with an upward leader from a grounded structure. Unlike negative downward leaders, which typically propagate in a highly branched manner, downward positive leaders (DPLs) can propagate either in a branched or unbranched
Marcelo M. F. Saba, Diego R. R. da Silva, Ivan T. Cruz, Tagianne P. da Silva, Paola B. Lauria, José Claudio O. Silva, Gabriel S. Diniz, Tom A. Warner, Rasha U. Abbasi, João Carlos M. Alves, Giovane B. Suss, Miguel B. Guimarães Neto, Listz S. Araujo, Ny T. Kieu   +13 more
wiley   +1 more source

Microspherules formed by lightning strikes

Meteoritics &Planetary Science, Volume 61, Issue 5, Page 743-767, May 2026.
Abstract Natural microspherules are formed by high‐temperature processes and are present throughout the geologic record to the present day. We report the discovery of large numbers of microspherules recovered from a rock pavement in the Pilbara region, Western Australia.
M. R. Boyd, M. J. Genge, A. G. Tomkins
wiley   +1 more source

Properties of Positive Narrow Bipolar Events Observed in South‐Eastern France

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 7, 16 April 2026.
Abstract Narrow bipolar events (NBEs) are brief intracloud discharges that generate the most intense radiation in the high frequency and very high frequency radio bands. Their occurrence is statistically correlated with strong convection and typically takes place in the upper regions of thunderclouds.
I. Kolmašová, S. Soula, O. Santolík, E. Defer, Y. Zhu, S. Pédeboy, R. Lán, A. Kolínská, L. Uhlíř   +8 more
wiley   +1 more source

Barriers to Indigenous Fire Stewardship on Karuk Lands

Ecology and Evolution, Volume 16, Issue 4, April 2026.
This paper examines the Karuk Tribe's experiences with settler colonialism and their efforts to restore cultural fire stewardship in the wake of the 2020 Slater Fire, which burned 157,000 acres of Karuk ancestral territory. Through a collaborative, community‐engaged case study approach, we conducted 13 interviews with Karuk Tribal members and staff to ...
Caitlyn Cruz, Kathy McCovey, Gregory Russell, Dominique David‐Chavez, Lindsey Schneider, Courtney Schultz   +5 more
wiley   +1 more source

Characterization and Localization of Chemical Explosions and Lightning Flashes by a Flotilla of Stratospheric Balloons

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 5, 16 March 2026.
Abstract On 3 August 2021, a flotilla of four Heliotrope solar hot air balloons was launched from central New Mexico (USA). The balloons, equipped with microbarometers, flew from sunrise to sunset at altitudes between 17 and 22 km. During the flight, eight chemical explosions ranging from 45 to 136 kg TNT equivalent and a thunderstorm occurred in the ...
T. Farges, G. Burgos, S. Albert, D. Bowman, O. Gainville, A. Le Pichon   +5 more
wiley   +1 more source

The Future of Hydrogen‐Powered Aviation: Technologies, Challenges, and a Strategic Roadmap for Sustainable Decarbonization

Advanced Energy and Sustainability Research, Volume 7, Issue 3, March 2026.
Hydrogen‐powered aviation offers a transformative pathway to zero‐emission flight by eliminating in‐flight CO2 emissions. Key considerations include propulsion systems (fuel cells and hydrogen combustion), cryogenic storage and insulation challenges, infrastructure and cost barriers, and supply‐chain constraints.
Mubasshira, Md Mahbubur Rahman, Karib Hassan Khan, Md Nizam Uddin, Dewan Hafiz Nabil   +4 more
wiley   +1 more source

Fail‐Controlled Classifiers: A Swiss‐Army Knife Toward Trustworthy Systems

Software: Practice and Experience, Volume 56, Issue 3, Page 239-259, March 2026.
ABSTRACT Background Modern critical systems often require to take decisions and classify data and scenarios autonomously without having detrimental effects on people, infrastructures or the environment, ensuring desired dependability attributes. Researchers typically strive to craft classifiers with perfect accuracy, which should be always correct and ...
Fahad Ahmed Khokhar, Tommaso Zoppi, Andrea Ceccarelli, Leonardo Montecchi, Andrea Bondavalli   +4 more
wiley   +1 more source