Effect of wind on the rise height of volcanic plumes

Details Effect of wind on the rise height of volcanic plumes Effect of wind on the rise height of volcanic plumes

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.3621b&link_type=abstract

Geophysical Research Letters, Volume 28, Issue 18, p. 3621-3624

Physics

20

Atmospheric Composition And Structure: Aerosols And Particles, Volcanology: Atmospheric Effects, Volcanology: Eruption Mechanisms

Scientific paper

A theoretical model of a volcanic plume, based on applying the equations of motion in a plume-centered coordinate system, suggests that the interaction between a volcanic plume and wind causes enhanced entrainment of air and horizontal momentum, plume bending, and a decrease in plume rise height at constant eruption rate. Because of rapid dilution in the high windspeeds of the polar jet, plumes that vary over more than one order of magnitude in mass eruption rate (106 to 107-108kg/s), if injected into the polar jet, may all attain rise heights only slightly different from that of the core of the jet, ~10 km, as opposed to 17-33 km in a still atmosphere.

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