| DOI: | 10.1002/grl.50376
|
| 论文题名: | Ash aggregation in explosive volcanic eruptions |
| 作者: | Telling J.; Dufek J.; Shaikh A.
|
| 刊名: | Geophysical Research Letters
|
| ISSN: | 0094-9013
|
| EISSN: | 1944-8744
|
| 出版年: | 2013
|
| 卷: | 40, 期:10 | | 起始页码: | 2355
|
| 结束页码: | 2360
|
| 语种: | 英语
|
| 英文关键词: | Aggregation
; Ash dispersal
; Experiments
; Hazard forecasting
; Numerical Modeling
; Volcanology
|
| Scopus关键词: | Aggregation model
; Ash dispersal
; Closed chambers
; Natural materials
; Residence time
; Volcanic eruptions
; Volcanic flows
; Volcanology
; Agglomeration
; Experiments
; Hazards
; Kinetics
; Numerical models
; Volcanoes
; aggregation
; ash
; experimental study
; forecasting method
; hydrodynamics
; numerical model
; relative humidity
; volcanic eruption
|
| 英文摘要: | Eruption dynamics are sensitive to ash aggregation, and aggregates are commonly found in eruptive deposits. While ash dispersal and associated hazards are sensitive to aggregation, few experiments have been conducted on this phenomena using natural materials across the diverse range of conditions expected in volcanic flows. We have isolated two regimes, wet and dry, in which aggregation occurs due to two different forces, electrostatic and hydrodynamic. Using a closed chamber to create a controlled atmosphere, we found that relative humidity, residence time, and kinetic energy are the three variables necessary to define wet and dry flow regimes. A series of process-based equations defining the behavior of ash particles have been developed. We propose an aggregation model that can be used for ash dispersal forecasts across a range of conditions in an eruptive plume. ©2013. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84879948521&doi=10.1002%2fgrl.50376&partnerID=40&md5=c20676ee709fbed98ccd071d1fc05963
|
| Citation statistics: |
|
| 资源类型: | 期刊论文
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/6277
|
| Appears in Collections: | 气候减缓与适应
|
|
There are no files associated with this item.
|
|
作者单位: | School of Earth and Atmospheric Sciences, Georgia Institute of Technology, 311 Ferst Dr., Atlanta, GA 30332-0340, United States
|
| Recommended Citation: | |
Telling J.,Dufek J.,Shaikh A.. Ash aggregation in explosive volcanic eruptions[J]. Geophysical Research Letters,2013-01-01,40(10).
|
|
|