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DOI | 10.1029/2018GL078286 |
Inferring Compressible Fluid Dynamics From Vent Discharges During Volcanic Eruptions | |
Harper, J. S. Mendez1,2; Cimarelli, C.3; Dufek, J.1; Gaudin, D.3; Thomas, R. J.4 | |
2018-07-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:14页码:7226-7235 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Germany |
英文摘要 | Observations at numerous volcanoes reveal that eruptions are often accompanied by continual radio frequency (CRF) emissions. The source of this radiation, however, has remained elusive until now. Through experiments and the analysis of field data, we show that CRF originates from proximal discharges driven by the compressible fluid dynamics associated with individual volcanic explosions. Blasts produce flows that expand supersonically, generating regions of weakened dielectric strength in close proximity to the vent. As erupted materialcharged through fragmentation, friction, or other electrification processtransits through such a region, pyroclasts remove charge from their surfaces in the form of small interparticle spark discharges or corona discharge. Discharge is maintained as long as overpressured conditions at the vent remain. Beyond describing the mechanism underlying CRF, we demonstrate that the magnitude of the overpressure at the vent as well as the structure of the supersonic jet can be inferred in real time by detecting and locating CRF sources. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000442582100053 |
WOS关键词 | SAKURAJIMA-VOLCANO ; RAPID DECOMPRESSION ; REDOUBT VOLCANO ; AIR BREAKDOWN ; JAPAN ; PLUME ; JETS ; FRAGMENTATION ; ELECTRIFICATION ; INFRASOUND |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/26234 |
专题 | 气候变化 |
作者单位 | 1.Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA; 2.Georgia Inst Technol, Sch Elect & Comp Engn, Atlanta, GA 30332 USA; 3.Ludwig Maximilians Univ Munchen, Dept Earth & Environm Sci, Munich, Germany; 4.New Mexico Inst Min & Technol, Dept Elect Engn, Socorro, NM 87801 USA |
推荐引用方式 GB/T 7714 | Harper, J. S. Mendez,Cimarelli, C.,Dufek, J.,et al. Inferring Compressible Fluid Dynamics From Vent Discharges During Volcanic Eruptions[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(14):7226-7235. |
APA | Harper, J. S. Mendez,Cimarelli, C.,Dufek, J.,Gaudin, D.,&Thomas, R. J..(2018).Inferring Compressible Fluid Dynamics From Vent Discharges During Volcanic Eruptions.GEOPHYSICAL RESEARCH LETTERS,45(14),7226-7235. |
MLA | Harper, J. S. Mendez,et al."Inferring Compressible Fluid Dynamics From Vent Discharges During Volcanic Eruptions".GEOPHYSICAL RESEARCH LETTERS 45.14(2018):7226-7235. |
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