Results 51 to 60 of about 86,801,291 (233)

Object‐based deep learning for probabilistic convective‐core nowcasting from satellite data

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Convective cores detected from Meteosat infrared imagery are represented as compact physical objects to generate probabilistic nowcasts up to 6 h ahead. A spatio‐temporal transformer models interactions among evolving core populations and produces gridded probability forecasts across the western Sahel.
Mendrika Rakotomanga, Douglas J. Parker, Nadhir Ben Rached, Seonaid R. Anderson, Cornelia Klein, Steven C. Wells   +5 more
wiley   +1 more source

Halos generated by negative cloud‐to‐ground lightning [PDF]

Geophysical Research Letters, 2007
The Imager for Sprites and Upper Atmospheric Lightning (ISUAL) on the FORMOSAT‐2 spacecraft observes Transient Luminous Events (TLE) like sprites, elves, and halos from space. We analyzed halos that were observed in Central America close enough to ELF/VLF receivers that allowed for the determination of the polarity of the parent lightning.
H. U. Frey, S. B. Mende, S. A. Cummer, J. Li, T. Adachi, H. Fukunishi, Y. Takahashi, A. B. Chen, R.‐R. Hsu, H.‐T. Su, Y.‐S. Chang   +10 more
openaire   +1 more source

Unusual vertical oscillations of a radiosonde

Weather, EarlyView.
In summer 2023 in southern England, several unusual balloon launches were observed which descended for a few minutes before resuming ascent. This unusual vertical oscillation was repeated several times in a ‘roller‐coaster’‐like pattern. This article discusses the behaviour of the balloons.
Caleb Miller, Chun Hay Brian Lo, Stephen Burt, Ryan R. Neely III   +3 more
wiley   +1 more source

Cloud‐to‐ground lightning in the blizzard of ′93

Geophysical Research Letters, 1993
In the 48‐hour period of 06 UT March 12 to 06 UT March 14, 1993, the eastern United States experienced one of the most severe storms of the century, This winter storm produced over 59,000 cloud‐to‐ground flashes with a peak lightning rate exceeding 5,100 flashes per hour.
openaire   +1 more source

Bipolar cloud‐to‐ground lightning flash observations [PDF]

Journal of Geophysical Research: Atmospheres, 2013
AbstractBipolar lightning is usually defined as a lightning flash where the current waveform exhibits a polarity reversal. There are very few reported cases of cloud‐to‐ground (CG) bipolar flashes using only one channel in the literature. Reports on this type of bipolar flashes are not common due to the fact that in order to confirm that currents of ...
Marcelo M. F. Saba, Carina Schumann, Tom A. Warner, John H. Helsdon, Wolfgang Schulz, Richard E. Orville   +5 more
openaire   +1 more source

Comparison of high‐speed optical observations of a lightning flash from space and the ground [PDF]

, 2020
We analyze a nighttime negative cloud‐to‐ground lightning flash in Colombia observed from the ground with a high‐speed camera at 5000 images per second, and from space by the Atmosphere‐Space Interactions Monitor (ASIM) on the International Space Station
Van der Velde, Oscar Arnoud, Velde, Oscar A., Chanrion, Olivier, Fabró, Ferran, Nikolai Østgaard, Steven Goodman, Oscar A. van der Velde, Goodman, Steven, Montañá Puig, Juan, Ferran Fabró, López, Jesús A., Fabró Tàpia, Ferran, Torsten Neubert, Victor Reglero, Østgaard, Nikolai, López Trujillo, Jesús Alberto, Joan Montanyà, Montanyà, Joan, Olivier Chanrion, Ostgaard, N., Reglero Velasco, Victor, Jesús A. López, Reglero, Victor, Neubert, Torsten   +23 more
core   +1 more source

A Survey and Perspectives on Mathematical Models for Quantitative Precipitation Estimation Using Lightning

Advances in Meteorology, 2017
Lightning is one of the most spectacular phenomena in nature. It is produced when there is a breakdown in the resistance in the electric field between the ground and an electrically charged cloud.
Carlos Manuel Minjarez-Sosa, Julio Waissman   +1 more
doaj   +1 more source

Seasonal and Regional Distribution of Lightning Fraction Over Indian Subcontinent

Earth and Space Science, 2023
Four years of Indian Institute of Tropical Meteorology lightning location network lightning observation data are used to determine the seasonal and spatial (over different geographical locations) distribution of the ratio of intra‐cloud (IC) lightning to
Rakesh Ghosh, S. D. Pawar, Anupam Hazra, Jonathan Wilkinson, Dipjyoti Mudiar, Manoj A. Domkawale, K. Gayatri Vani, V. Gopalakrishnan   +7 more
doaj   +1 more source

How weather got its words: a history of meteorological English – Part 2: the scientific age and beyond

Weather, EarlyView.
The English language is a gargantuan, gluttonous beast. It has become extraordinary in its powers of assimilation – such that we rarely consider the origins of the words we use. In this paper, we will shed light on these origins, including the Pontic–Caspian steppe, the British Empire and, of course, a TV show.
Kieran M. R. Hunt
wiley   +1 more source

Mapping the cloud-to-ground lightning occurrence in Fiji [PDF]

The South Pacific Journal of Natural and Applied Sciences, 2006
Using the Time Of Group Arrival (TOGA) of sferics two year (Jan2003-Dec2004) annual average of about 3,200 and 1,200 cloud-to-ground (CG) flashes were recorded in the two larger islands, Viti Levu and Vanua Levu, Fiji. A two year average CG flash density showed maxima of 0.80 and 0.35 flashes/km2 per year in two islands.
V Ramachandran, A Kishore, S Kumar
openaire   +1 more source