Which hazard is intensified as pyroclastic flows entrain air?

💡 Explanation

Flow front velocity during a pyroclastic surge intensifies with increased volumes of entrained air via the venturi effect, because reduced pressure leads to acceleration; therefore, flow will move at higher speeds, rather than reducing buoyancy.

• Which outcome occurs when high Arctic ice melt disrupts the North Atlantic ocean?
• Which consequence results when aggressive dissolution widens joints of subsurface limestone?
• Which climate outcome results at the polar high?
• Which consequence results when decreased flood frequency occurs in an alluvial river system?
• Which mechanism causes increased liquefaction risk during seismic shaking of unconsolidated coastal sediments?
• Which outcome occurs when sediment supply overwhelms a river's capacity around an alluvial fan in a tectonic basin?