Observations of the effect of wind on the cooling of active lava flows

Details Observations of the effect of wind on the cooling of active lava flows Observations of the effect of wind on the cooling of active lava flows

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30ssde4k&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 19, pp. SDE 4-1, CiteID 1989, DOI 10.1029/2003GL017994

Physics

9

Atmospheric Composition And Structure: Instruments And Techniques, Volcanology: Atmospheric Effects (0370), Volcanology: Physics And Chemistry Of Magma Bodies, Volcanology: Instruments And Techniques

Scientific paper

We present the first direct observations of the cooling of active lava flows by the wind. We confirm that atmospheric convective cooling processes (i.e., the wind) dominate heat loss over the lifetime of a typical pahoehoe lava flow. In fact, the heat extracted by convection is greater than predicted, especially at wind speeds less than 5 m/s and surface temperatures less than 400°C. We currently estimate that the atmospheric heat transfer coefficient is about 45-50 W m-2 K-1 for a 10 m/s wind and a surface temperature ~500°C. Further field experiments and theoretical studies should expand these results to a broader range of surface temperatures and wind speeds.

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