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| DOI | 10.1029/2020GL086951 |
| Toward the Acoustic Detection of Two-Phase Flow Patterns and Helmholtz Resonators in Englacial Drainage Systems | |
| Podolskiy E.A. | |
| 发表日期 | 2020 |
| ISSN | 0094-8276 |
| 卷号 | 47期号:6 |
| 英文摘要 | Passive acoustic monitoring has revolutionized the characterization of industrial processes and the acoustic wavefield in various environments. However, cryospheric acoustic phenomena remain largely unknown, especially at medium and small scales. Furthermore, the englacial drainage system is poorly documented, even though it is fundamental for understanding water routing through the glacier body. Here I present the first-of-its-kind in situ records of periodic or sustained acoustic signals generated by water drainage through crevasses at the calving front of a glacier, in this case a Greenlandic tidewater glacier. The generative mechanisms of gurgling and bubbling noise are explained as flow-induced sounds that are excited by intermittent air-water two-phase flow and Helmholtz resonance, respectively. This paper demonstrates that there is the tremendous potential to study near-surface glacier systems using acoustic methods and detect different flow patterns in englacial conduits from their acoustic signatures, both of which can significantly advance our understanding of glaciological processes. ©2020. The Authors. |
| 英文关键词 | Acoustic resonators; Acoustic variables measurement; Acoustic waves; Acoustics; Air; Drainage; Flow patterns; Glaciers; Air-water two phase flows; bubble burst; crevasse; Generative mechanism; Greenland; Helmholtz resonators; Intermittent flows; Passive acoustic monitoring; Two phase flow; acoustic method; crevasse; detection method; drainage network; englacial process; flow pattern; glaciology; Helmholtz equation; iceberg calving; tidewater glacier; two phase flow; wave field; Arctic; Greenland |
| 语种 | 英语 |
| 来源期刊 | Geophysical Research Letters
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/170562 |
| 作者单位 | Arctic Research Center, Hokkaido University, Sapporo, Japan; Graduate School of Environmental Science, Hokkaido University, Sapporo, Japan; GiCORE, Hokkaido University, Sapporo, Japan |
| 推荐引用方式 GB/T 7714 | Podolskiy E.A.. Toward the Acoustic Detection of Two-Phase Flow Patterns and Helmholtz Resonators in Englacial Drainage Systems[J],2020,47(6). |
| APA | Podolskiy E.A..(2020).Toward the Acoustic Detection of Two-Phase Flow Patterns and Helmholtz Resonators in Englacial Drainage Systems.Geophysical Research Letters,47(6). |
| MLA | Podolskiy E.A.."Toward the Acoustic Detection of Two-Phase Flow Patterns and Helmholtz Resonators in Englacial Drainage Systems".Geophysical Research Letters 47.6(2020). |
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