EAPSI: Analysis of Fumarole Acoustics at Aso Volcano, Japan
EAPSI:日本阿苏火山喷气孔声学分析
基本信息
- 批准号:1515624
- 负责人:
- 金额:$ 0.51万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Fellowship Award
- 财政年份:2015
- 资助国家:美国
- 起止时间:2015-06-01 至 2016-05-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
This award supports research to characterize the sound from fumaroles to advance the understanding of sound produced from volcanic processes. Fumaroles are vents in active volcanic environments that issue steam and other volatiles (i.e. carbon dioxide, sulfur dioxide, etc.) at temperatures greater than 100°C. Pressurized gas jetting out of fumaroles also produces sound waves. Fumarole acoustics and degassing can inform us about current and future volcanic activity, as changes in the acoustics and volcanic emissions can be precursors to larger volcanic eruptions. Volcanic jet noise is a direct measure of the pressure fluctuations produced during an eruption and can provide information on the eruption column itself. Jet noise is produced by sustained, momentum-driven fluid flow through a nozzle, such as that of a jet engine, while volcanic jet noise is a sustained acoustic signal produced from the volcanic jet during sustained eruptions. In the latter, the nozzle is the vent of the volcano. Acoustics of laboratory jet engine noise reveals a relationship between the jet noise and the jet?s physical characteristics (velocity, diameter, mass flux, etc.). However, this relationship is still poorly understood for volcanic jets and volcanic jet noise. The research will be conducted under the mentorship of Dr. Takahiro Ohkura and Dr. Akihiko Yokoo of the Aso Volcanological Laboratory at Kyoto University. One of the goals of the volcano acoustics community is to quantitatively relate sound from volcanic jets back to the eruption itself, but due to the complexities of volcanic jets and field environments this goal has been elusive, thus additional data are needed. This project aims to advance our understanding of volcanic jets and eruption columns by investigating the jet noise produced by fumarolic activity, and then disseminate this information to various volcano observatories and the general scientific community. We will deploy two arrays of infrasound microphones with some collocated with seismometers, at Aso Volcano, Japan to observe and characterize fumarole acoustics and determine their seismo-acoustic signature. Forward Looking Infrared Radiometer (FLIR) cameras will also be used to observe gas emission dynamics, as gases are invisible to the human eye. This NSF EAPSI award is funded in collaboration with the Japan Society for the Promotion of Science.
该奖项支持研究从火山口发出的声音,以促进对火山过程产生的声音的理解。富马洛尔是活火山环境中的喷口,会释放蒸汽和其他挥发物(即二氧化碳、二氧化硫等)。温度高于100°C。从小孔中喷出的加压气体也会产生声波。Fumarole声学和脱气可以告诉我们当前和未来的火山活动,因为声学和火山排放的变化可能是更大的火山爆发的前兆。火山喷流噪声是对喷发过程中产生的压力波动的直接测量,可以提供关于喷发柱本身的信息。喷射噪声是由持续的、动量驱动的流体流过喷嘴(例如喷气发动机的喷嘴)而产生的,而火山喷射噪声是在持续喷发期间由火山喷流产生的持续声学信号。在后者中,喷嘴是火山的出口。实验室喷气发动机噪声的声学揭示了喷气噪声和喷气噪声之间的关系?的物理特性(速度、直径、质量通量等)。然而,对于火山喷流和火山喷流噪声,这种关系仍然知之甚少。这项研究将在京都大学阿索火山实验室的大仓孝弘博士和横尾明彦博士的指导下进行。火山声学社区的目标之一是定量地将火山喷流的声音与喷发本身联系起来,但由于火山喷流和现场环境的复杂性,这一目标一直难以实现,因此需要更多的数据。该项目旨在通过调查火山活动产生的喷流噪音来增进我们对火山喷流和喷发柱的了解,然后将这一信息传播给各火山观测站和一般科学界。我们将在日本的阿索火山部署两个次声麦克风阵列,其中一些与地震检波器并列,以观察和表征次声声学,并确定其地震声学特征。前视红外辐射计(FLIR)相机也将用于观察气体排放动态,因为气体是人眼不可见的。这个NSF EAPSI奖是与日本科学促进协会合作资助的。
项目成果
期刊论文数量(0)
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科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Kathleen McKee其他文献
Kathleen McKee的其他文献
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{{ truncateString('Kathleen McKee', 18)}}的其他基金
EAR-PF: Volume flux comparison using seismically derived tilt, infrasound, and gas data at Stromboli Volcano, Italy
EAR-PF:使用意大利斯特龙博利火山的地震推导的倾斜、次声和气体数据进行体积通量比较
- 批准号:
1725730 - 财政年份:2017
- 资助金额:
$ 0.51万 - 项目类别:
Fellowship Award
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