Turbulent times at Taupo
Article Abstract:
A numerical model using equations for a dilute, turbulent, homogeneous suspension current explains the transport and sedimentation of the violent Taupo pyroclastic flow that had erupted in New Zealand 1,800 years ago. A flow with a solid fraction of 0.3%, a travel duration of 15 minutes and a volume flux of 40 km cubed per sec account for the radial variation of the thickness of the deposit and the 80-km spread of the Taupo flow. Extrapolation of the dilute flow model to ignimbrites of higher aspect ratio appears improbable.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
User Contributions:
Comment about this article or add new information about this topic:
Taupo's atypical arc
Article Abstract:
Taupo Volcanic Zone (TVZ), the southern most continental part of about a 2,800 km long volcanic arc, spreading from Kermadec Islands to Tonga, is the most unique segment in the world. TVZ has three segments. The north and the south segments are similar to other continental arcs with andesite-dacite cone volcanoes and relatively low geothermal heat. However, the center is an unusual area of rhyolitic volcanism and large geothermal heat. The heat is seven times more than normal in the Yellowstone system.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
User Contributions:
Comment about this article or add new information about this topic:
Emplacement of the Taupo ignimbrite by a dilute turbulent flow
Article Abstract:
An isothermal, hydraulic model successfully predicts the regional patterns in the Taupo ignimbrite of New Zealand. The model proposes the emplacement of the pumice-rich deposit by a turbulent flow with the flow rates of solids and gases being 40 km cubed per sec for about 15 minutes. The flux produced a 1 km thick solid with a concentration of 0.3% by volume that flowed outward from the vent with a speed of 200 m per sec. The computed and actual radial trends in the Taupo deposits agree well.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Large-scale impoverishment of Amazonian forests by logging and fire. Modelling conservation in the Amazon basin
- Abstracts: Identifying predators at northern bobwhite nests. Estimating calling rates of northern bobwhite coveys and measuring abundance
- Abstracts: Lifetime of the P-selectin-carbohydrate bond and its response to tensile force in hydrodynamic flow. Adhesion through L-selectin requires a threshold hydrodynamic shear
- Abstracts: Tyrosine kinases in activation of the MAP kinase cascade by G-protein-coupled receptors. Direct stimulation of Bruton's tyrosine kinase by Gq-protein alpha-subunit
- Abstracts: Optimal foraging and timing processes in the starling, Sturnus Vulgaris: effect of inter-capture interval. Value of food aggregates: parallel versus serial discounting