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33 results for “Lightning flash”
Data for "Leader Polarity-Reversal Feature and Charge Structure of Three Upward Bipolar Lightning Flashes"
<p>In a manuscript entitled “Leader Polarity-Reversal Feature and Charge Structure of Three Upward Bipolar Lightning Flashes”,lightning locations,electric field and current data can be obtained through the following attachment.These files can be opened by matlab 2016(or later). The data supports the aforementioned manuscript and can be used freely for scientific purposes with appropriate citation.<br> One thing should be noted that in the files associated with LMA data,five columns represent x,y,z,time and radiation power, respectively.</p>
Broadband Characteristics of Chaotic Pulse Trains associated with Sequential Dart Leaders in a Rocket-Triggered Lightning Flash
<p>The data supports the paper entitled “<a href="https://doi.org/10.1029/2018JD029488">Broadband Characteristics of Chaotic Pulse Trains associated with Sequential Dart Leaders in a Rocket-Triggered Lightning Flash</a>” published in JGR-Atmospheres, and these files can be opened by MATLAB. The data can be used freely for scientific purposes with appropriate citation.</p>
Charge regions indicated by LMA lightning flashes in Hokuriku's winter thunderstorms
<p>The attached is the dataset assoicated with the paper titled "Charge regions indicated by LMA lightning flashes in Hokuriku’s winter thunderstorms" which was submitted to Journal of Geophysical Research: Atmospheres.</p> <p>The charge distribution of some cells in three winter thunderstorms in the Hokuriku region of Japan is investigated based on Lightning Mapping Array (LMA) flash data. The vertical arrangements of charge regions involved in lightning discharges suggest diverse charge patterns, including quad-polar, tripole, positive dipole, inverted dipole, and inverted tripole. The riming electrification between graupel and ice crystals or their aggregations are thought to be responsible for the electrification of most cells. The charging process between snow/aggregates and ice crystals may be responsible for some inverted charge structure occurred above 0 ℃ isotherm and accompanying with weak radar echoes. Convection indicated by the vertical development of radar reflectivity appears crucial to shaping the diverse charge distribution patterns by determining which charging mechanisms occur and where; it also influences changes in height or even the disappearance of the charge regions. The charged cores are distributed from 0.7 to 5.3 km heights and 2 to –31 ℃ temperatures, while the distances between adjacent charged cores with opposite polarities change between 0.2 and 3.4 km, with a mean of 1.3 km. The mean flash duration, and horizontal distance are 425.0 ms and 19.8 km, respectively. The average height, temperature, and power of flash initiations are 2.8 km, −11.9 ℃ and 15.6 dBW, respectively.</p>
Data for "Temporal and Spatial Characteristics of Preliminary Breakdown Pulses in Intracloud Lightning Flashes"
<p>In the manuscript entitled "Temporal and Spatial Characteristics of Preliminary Breakdown Pulses in Intracloud Lightning Flashes", the corresponding data is provided in the following attachment. These files can be opened by Matlab 2016 (or later).</p>
Structural Characteristics of Thunderstorms Associated with Triggered Lightning Flashes
Open the record for dataset details and reuse information.
Characteristics of negative cloud-to-ground lightning flashes associated with their peak currents of first return strokes - v2
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First Observation of Dart Leader-M Component Process in a Rocket Triggered Lightning Flash
<p>A rare dart leader (DL)-M component process in a double-branch lightning flash was analyzed through high-speed camera and synchronizing current and electric field data.</p>
Two representative triggered lightning flashes recorded at Langmuir Lab and their polarity asymmetries
<p>This data set contains Lightning Mapping Array (LMA) and shunt current measurements for two representative triggered lightning flashes recorded at Langmuir Lab — one of each polarity. Use the script loadNplot_triggered_flash_zenodo.m to load and plot the data.</p>
Performance Evaluation of LMI based on Low-frequency Three-dimensional Total Lightning Flash Location System
<p>In a manuscript entitled "Performance Evaluation of LMI based on Low-frequency Three-dimensional Total Lightning Flash Location System", the performance evaluation of the Lightning Mapping Imager (LMI) were assessed. The data of our results are including in the Figure x.figs. These files can be opened by MATLAB. The data supports the aforementioned manuscript and can be used freely for scientific purposes with appropriate citation</p>
Velocities of positive leaders in intracloud and negative cloud-to-ground lightning flashes
<p>Velocities of positive leaders in IC, -CG and +CG flashes.</p>
Duration, spatial size and radiance of lightning flashes over the Asia-Pacific region based on TRMM/LIS observations
<p>The dataset is associated with the paper titled as "Duration, spatial size and radiance of lightning flashes over the Asia-Pacific region based on TRMM/LIS observations" which is considered for publication in "Atmospheric Research". It can be access using "Matlab" software. The abstract of this paper is as follow:</p> <p>The geographical distributions of flash duration, length, footprint and radiance, as well as their correspondence with thunderstorm structures, are investigated for the first time in the Asia-Pacific region ranging from 70°E to 160°E and from 18°N to 36°N and in six specially chosen regions by employing flash data collected by the Lightning Imaging Sensor (LIS) aboard the Tropical Rainfall Measuring Mission (TRMM) satellite and TRMM-based radar precipitation feature (RPF) data from 2002 to 2014. The flash length, footprint and radiance values are, on average, the largest over the deep ocean, followed by offshore waters and land. Flash duration is the longest over the offshore waters near the east coast of China, followed by the deep ocean and land. The Tibet Plateau and the northern part of the Indian Peninsula have the weakest flash properties in the study region. Furthermore, the geographic distributions of the flash properties exhibit evident seasonal changes. The monotonic relationship between flash spatial size and radiance is stronger than the monotonic relationships between flash duration and spatial size or radiance. Based on a comparison of the seasonal and regional changes in flash properties with RPF properties, convective intensity is proposed to play a crucial role in characterizing the flash spatial size and radiance, according to their inverse correlation in most regions. However, the climatological correspondence between flash duration and thunderstorm structures remains poorly constrained. We have launched a discussion of the possible association between thunderstorm structures and flash properties.</p>
A Satellite-Detected Terrestrial Gamma-ray Flash Produced by a Cloud-to-Ground Lightning Leader
<p>The data supports the manuscript entitled “A Satellite-Detected Terrestrial Gamma-ray Flash Produced by a Cloud-to-Ground Lightning Leader” that is submitted to GRL. These files can be opened by MATLAB. The data can be used freely for scientific purposes with appropriate citation.</p>
Data for "A Comparison on the E-change Pulses Occurring in the Bi-level Polarity-opposite Charge Regions of the Intra-Cloud Lightning Flashes"
<p>In a manuscript entitled “A Comparison on the E-change Pulses Occurring in the Bi-level Polarity-opposite Charge Regions of the Intra-Cloud Lightning Flashes”, lightning locations and electric field can be obtained through the following attachment. These files can be opened by MATLAB 2016 (or later). The data supports the aforementioned manuscript and can be used freely for scientific purposes with appropriate citations.</p> <p> </p> <p>Data named as “Example_IC_Flash” consists of locations and an E-change waveform. Each location data has four columns, representing x (km), y (km), z (km), and time (ms). The E-change data has two columns, namely to time (ms) and E-change amplitude (DU).</p> <p> </p> <p>The other Data are stored using the form of ‘.fig’. Researchers can open these figures directly by using MATLAB.</p>
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