DOI: 10.1002/2015GL064199
论文题名: Changes to the turbulent kinematics of a volcanic plume inferred from lightning data
作者: Behnke S.A. ; Bruning E.C.
刊名: Geophysical Research Letters
ISSN: 0094-9364
EISSN: 1944-9095
出版年: 2015
卷: 42, 期: 10 起始页码: 4232
结束页码: 4239
语种: 英语
英文关键词: lightning
; plume dynamics
; plume kinematics
; turbulence
; volcanic lightning
Scopus关键词: Explosives
; Kinematics
; Turbulence
; Volcanoes
; Energy spectra
; Explosive events
; Lightning datum
; Plume dynamics
; Turbulence characteristics
; Volcanic lightning
; Volcanic plume
; Volcano eruptions
; Lightning
; explosive volcanism
; kinematics
; lightning
; plume
; thunderstorm
; turbulent flow
; volcanic eruption
; Alaska
; Redoubt
; United States
英文摘要: The 2009 Redoubt Volcano eruption produced a series of explosive events, the largest of which produced episodes of volcanic lightning similar to thunderstorms. Flash energy spectra were calculated from lightning mapping data collected during the eruption. The spectra were compared to the turbulence characteristics expected from each stage of plume development. Small flash length scales present at early times were associated with the gas thrust and initial convective stages. Increases in flash length scales and flash energy as the explosive events progressed were associated with an increase in volume of the plume. Spectra with a large range in flash length scales (0.2-10 km) and a spectral peak at small flash length scales (< 1 km) were associated with a superposition of spectra from gas thrust, convective, and umbrella/ash cloud regions. An approximate 5/3 power law slope was observed on the order of 10 min after gas thrust forcing had ended and the transition to a drifting ash cloud was underway, which may reflect the dissipating state of the drifting ash cloud. ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84931560608&doi=10.1002%2f2015GL064199&partnerID=40&md5=fcdeb36658d51f415ee41c02f7a8e733
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8979
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: School of Geosciences, University of South Florida, Tampa, FL, United States
Recommended Citation:
Behnke S.A.,Bruning E.C.. Changes to the turbulent kinematics of a volcanic plume inferred from lightning data[J]. Geophysical Research Letters,2015-01-01,42(10).