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DOI | 10.1029/2019GL084678 |
Electrification of Experimental Volcanic Jets with Varying Water Content and Temperature | |
Stern, S.; Cimarelli, C.; Gaudin, D.; Scheu, B.; Dingwell, D. B. | |
2019-10-30 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
文章类型 | Article;Early Access |
语种 | 英语 |
国家 | Germany |
英文摘要 | Volcanic lightning-a near ubiquitous feature of explosive volcanic eruptions-possesses great potential for the analysis of volcanic plume dynamics. To date, the lack of quantitative knowledge on the relationships between plume characteristics hinders efficient data analysis and application of the resulting parameterizations. We use a shock-tube apparatus for rapid decompression experiments to produce particle-laden jets. We have systematically and independently varied the water content (0-27 wt%) and the temperature (25-320 degrees C) of the particle-gas mixture. The addition of a few weight percent of water is sufficient to reduce the observed electrification by an order of magnitude. With increasing temperature, a larger number of smaller discharges are observed, with the overall amount of electrification staying similar. Changes in jet dynamics are proposed as the cause of the temperature-dependence, while multiple factors (including the higher conductivity of wet ash) can be seen responsible for the decreased electrification in wet experiments. |
英文关键词 | volcanic lightning atmospheric electricity Faraday cage volcanic jets temperature water content |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000493272200001 |
WOS关键词 | FRACTIONAL CRYSTALLIZATION ; EXPLOSIVE ERUPTIONS ; SAKURAJIMA VOLCANO ; FLUID-DYNAMICS ; MT. SHASTA ; GENERATION ; TRIBOELECTRIFICATION ; CONSTRAINTS ; ANDESITE ; HUMIDITY |
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/187848 |
专题 | 气候变化 |
作者单位 | Ludwig Maximilians Univ Munchen, Dept Earth & Environm Sci, Munich, Germany |
推荐引用方式 GB/T 7714 | Stern, S.,Cimarelli, C.,Gaudin, D.,et al. Electrification of Experimental Volcanic Jets with Varying Water Content and Temperature[J]. GEOPHYSICAL RESEARCH LETTERS,2019. |
APA | Stern, S.,Cimarelli, C.,Gaudin, D.,Scheu, B.,&Dingwell, D. B..(2019).Electrification of Experimental Volcanic Jets with Varying Water Content and Temperature.GEOPHYSICAL RESEARCH LETTERS. |
MLA | Stern, S.,et al."Electrification of Experimental Volcanic Jets with Varying Water Content and Temperature".GEOPHYSICAL RESEARCH LETTERS (2019). |
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