Gamma Ray Flashes Produced by Lightning Observed at Ground Level by TETRA-II

被引：20

作者：

Pleshinger, D. J. ^{[1
]}

Alnussirat, S. T. ^{[1
]}

Arias, J. ^{[2
]}

Bai, S. ^{[3
]}

Banadaki, Y. ^{[3
]}

Cherry, M. L. ^{[1
]}

Hoffman, J. H. ^{[1
]}

Khosravi, E. ^{[3
]}

Legault, M. D. ^{[4
]}

Rodriguez, R. ^{[5
]}

Smith, D. ^{[1
,6
]}

del Toro, E. ^{[7
]}

Trepanier, J. C. ^{[6
]}

Sunda-Meya, A. ^{[8
]}

机构：

[1] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA

[2] Ctr Nacl Metrol Panama, Panama City, Panama

[3] Southern Univ, Dept Comp Sci, Baton Rouge, LA USA

[4] Univ Puerto Rico Bayamon, Dept Phys, Bayamon, PR USA

[5] Univ Puerto Rico Utuado, Programa Ciencias Sociales, Utuado, PR USA

[6] Louisiana State Univ, Dept Geog & Anthropol, Baton Rouge, LA 70803 USA

[7] Univ Puerto Rico Utuado, Utuado, PR USA

[8] Xavier Univ, Dept Phys Louisiana, New Orleans, LA 70125 USA

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS | 2019年 / 124卷 / 11期

关键词：

BREAKDOWN;

D O I：

10.1029/2019JA026820

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In its first 2 years of operation, the ground-based Terrestrial gamma ray flash and Energetic Thunderstorm Rooftop Array (TETRA)-II array of gamma ray detectors has recorded 22 bursts of gamma rays of millisecond-scale duration associated with lightning. In this study, we present the TETRA-II observations detected at the three TETRA-II ground-level sites in Louisiana, Puerto Rico, and Panama together with the simultaneous radio frequency signals from the lightning data sets VAISALA Global Lightning Dataset, VAISALA National Lightning Detection Network, Earth Networks Total Lightning Network, and World Wide Lightning Location Network. The relative timing between the gamma ray events and the lightning activity is a key parameter for understanding the production mechanism(s) of the bursts. The gamma ray time profiles and their correlation with radio sferics suggest that the gamma ray events are initiated by lightning leader activity and are produced near the last stage of lightning leader channel development prior to the lightning return stroke.

引用

页码：9229 / 9238

页数：10

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