Results 41 to 50 of about 465 (149)

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

Impact of fragmented urbanization on observed precipitation

Quarterly Journal of the Royal Meteorological Society, EarlyView.
This study investigates the impact of fragmented urban landscapes on downwind precipitation by applying an innovative observation‐centered approach to an extensive rain gauge network in Belgium. The approach classifies the observations based on the upwind urban land cover fraction, and compares precipitation indices between rural‐ and urban‐labeled ...
Amber Jacobs, Kwinten Van Weverberg, Steven Caluwaerts   +2 more
wiley   +1 more source

Characterizing Pulse Attenuation of Intra-Cloud and Cloud-to-Ground Lightning with E-Field Signal Measured at Multiple Stations

Remote Sensing, 2022
In this paper, we analyze the waveform data of nearly 200,000 intra-cloud (IC) and cloud-to-ground (CG) lightning discharges detected by the Jianghuai Area Sferic Array on 26–29 August 2019 to investigate the propagation features of lightning ...
Wenwei Wang, Baoyou Zhu
doaj   +1 more source

Lightning electromagnetic emission location using arrival time differencing (LEELA): An introduction to the Met Office's next generation Very Low Frequency lightning location system

Quarterly Journal of the Royal Meteorological Society, EarlyView.
This paper describes the Met Office's new lightning location system LEELA. A brief overview of the upgraded hardware and geolocation algorithms is given. LEELA has improved lightning detection capabilities, especially at night. When comparing LEELA to the previous ATDnet system against ground truths LEELA has 100% storm detection efficiency within 5 km
Graeme Marlton, Mike Protts, Stephen Prust, Edmund Keith Stone, Debbie O'Sullivan, Sue Twelves, Francesco Devoto, Claire Witham   +7 more
wiley   +1 more source

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

Green Flashes Observed in Optical and Infrared during an Extreme Electric Storm

Applied Sciences
A strong and fast-moving electrical storm occurred in the Southwest Florida region overnight, from 01:00 UTC on 17 April to 07:00 UTC on 17 April 2023. Video recordings were conducted in the region at Latitude N 26.34° and Longitude W 81.79° for 5 h and ...
Gilbert Green, Naomi Watanabe
doaj   +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

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

Relationships between dryline intensity, deep moist convection and regional circulation over interior southern Africa

Quarterly Journal of the Royal Meteorological Society, EarlyView.
We explore the relationship between dryline intensity, convective activity, and the regional circulation over southern Africa during summer by comparing weak and strong convective drylines with each other. We find that strong drylines result in stronger convection with up to 3.6 times more lightning strokes adjacent to the dryline than on weak dryline ...
Lynette van Schalkwyk, Ross C. Blamey, Cornelia Klein, Chris J. C. Reason   +3 more
wiley   +1 more source