Results 181 to 190 of about 27,882 (229)

Initiation of cloud-to-ground lightning strokes

Journal of Geophysical Research, 1970
Using a computer and postulating highly idealized thundercloud conditions, we have modeled the interaction between a population of raindrops and a region of high electric field. Under favorable circumstances, the interaction produced a downward-moving wave of potential gradient that intensified the preexisting field without apparent limit.
G. A. Dawson, D. G. Duff
openaire   +1 more source

Cloud-to-ground lightning distribution in Brazil

Journal of Atmospheric and Solar-Terrestrial Physics, 2003
Abstract The cloud-to-ground lightning distribution in Brazil is reviewed based on data from thunderstorm days, flash counters, LF/VLF lightning detection networks, precipitation, and optical satellite sensors. Brazil is the largest tropical country in the world and, in consequence, one of the countries with highest lightning activity.
I.R.C.A. Pinto, O. Pinto
openaire   +1 more source

Cloud-to-Ground Lightning Observations in Brazil

2009
A comprehensive review of cloud-to-ground (CG) lightning observations in Brazil is presented. Brazil is the largest country in the tropical region and it is believed to have the largest cloud-to-ground (CG) lightning activity in the world, estimated from thunderstorm days and satellite data in about 50 millions CG lightning flashes every year. Emphasis
Osmar Pinto, Iara R.C.A. Pinto, Marcelo M.F. Saba, Kleber P. Naccarato   +3 more
openaire   +1 more source

Analysis of cloud-to-ground lightning density in Brazil

2017 International Symposium on Lightning Protection (XIV SIPDA), 2017
The importance of information on cloud-to-ground lightning density to the Brazilian society has been increasing in importance due to their use in many different applications, in particular for the Brazilian Electric Sector. However, the information needs to be precise otherwise their use in engineering application does not provide large benefits.
Ana Marotti, Osmar Pinto
openaire   +1 more source

Negative cloud-to-ground lightning flashes in Malaysia

Journal of Atmospheric and Solar-Terrestrial Physics, 2014
The characteristics of the negative cloud-to-ground lightning flashes in Malaysia are studied by analyzing the electric fields generated by the whole flash in nanosecond resolution. A total of 405 strokes obtained from 100 successive negative cloud-to-ground lightning flashes were analyzed, which were recorded from seven convective thunderstorms during
Z.A. Baharudin, Noor Azlinda Ahmad, J.S. Mäkelä, Mahendra Fernando, Vernon Cooray   +4 more
openaire   +1 more source

Cloud Seeding and Cloud-to-Ground Lightning

Journal of Applied Meteorology, 1967
Abstract During the summers of 1958 to 1962, convective clouds over a mountain range in southeastern Arizona were seeded by means of airborne silver-iodide generators. The data collected do not allow a conclusion that the seeding influenced the amount of cloud-to-ground lightning.
openaire   +1 more source

Positive cloud to ground lightning return strokes

Journal of Geophysical Research: Oceans, 1983
Several recent papers have reported positive cloud‐to‐ground lightning, but, in our opinion, none provides sufficiently direct evidence that positive return strokes occurred in any given case. Here we present observations that plainly demonstrate the occurrence of positive return strokes in a convective thunderstorm in Florida in August 1982.
William H. Beasley, Martin A. Uman, Douglas M. Jordan, Chidambar Ganesh   +3 more
openaire   +1 more source

Cloud‐to‐ground lightning in Hurricane Andrew

Journal of Geophysical Research: Atmospheres, 1994
The spatial and temporal distribution of cloud‐to‐ground lightning was examined in Hurricane Andrew of 1992. Lightning locations available from the National Lightning Detection Network were superimposed on infrared satellite images to relate lightning activity to hurricane cloud structure.
openaire   +1 more source

Cloud-to-Ground Lightning in Malaysia: A Review Study

Applied Mechanics and Materials, 2016
Lightning has been the major cause of power interruptions in Malaysia. Malaysia is located near the equator having approximately 200 thunder days per year. It is known to be among the highest lightning activity country worldwide. TNB as the main power supply utility in Malaysia has made an effort to reduce the power interruptions via installation of ...
Chin Leong Wooi, Zulkurnain Abdul-Malek, Noor Azlinda Ahmad, Mehrdad Mokhtari, Amir Hesam Khavari   +4 more
openaire   +1 more source

Positive cloud‐to‐ground lightning observations

Journal of Geophysical Research: Atmospheres, 1985
Cloud‐to‐ground lightning discharges have been studied for more than 50 years by means of visual, photographic, and electromagnetic observations as well as direct measurements of current. One of the first questions to be addressed was that of the sign of net effective charge transferred to earth.
openaire   +1 more source