DOI: 10.1002/2014GL061254
论文题名: Calculating the velocity of a fast-Moving snow avalanche using an infrasound array
作者: Havens S. ; Marshall H-P. ; Johnson J.B. ; Nicholson B.
刊名: Geophysical Research Letters
ISSN: 0094-9807
EISSN: 1944-9538
出版年: 2014
卷: 41, 期: 17 起始页码: 6191
结束页码: 6198
语种: 英语
Scopus关键词: Snow
; Avalanche signals
; Infrasound signals
; Mass-wasting events
; Maximum velocity
; Precursory signals
; Snow avalanche
; Source location
; Spatial and temporal resolutions
; Velocity
; array
; mathematical analysis
; signal
; snow avalanche
; spatiotemporal analysis
; velocity
; Idaho
; United States
英文摘要: On 19 January 2012, a large D3 avalanche (approximately 103 t) was recorded with an infrasound array ideally situated for observing the avalanche velocity. The avalanche crossed Highway 21 in Central Idaho during the largest avalanche cycle in the 15 years of recorded history and deposited approximately 8 m of snow on the roadway. Possible source locations along the avalanche path were estimated at 0.5 s intervals and were used to calculate the avalanche velocity during the 64 s event. Approximately 10 s prior to the main avalanche signal, a small infrasound signal originated from the direction of the start zone. We infer this to be the initial snow pack failure, a precursory signal to the impending avalanche. The avalanche accelerated to a maximum velocity of 35.9 ± 7.6 m s-1 within 30 s before impacting the highway. We present a new technique to obtain high spatial and temporal resolution velocity estimates not previously demonstrated with infrasound for avalanches and other mass wasting events. © 2014. American Geophysical Union. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84907942375&doi=10.1002%2f2014GL061254&partnerID=40&md5=c8a28a06d6fae1e284684a6a50c874e0
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7071
Appears in Collections: 气候减缓与适应
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作者单位: Center for Geophysical Investigation of the Shallow Subsurface, Boise State University, Boise, ID, United States
Recommended Citation:
Havens S.,Marshall H-P.,Johnson J.B.,et al. Calculating the velocity of a fast-Moving snow avalanche using an infrasound array[J]. Geophysical Research Letters,2014-01-01,41(17).