Physics
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufm.v32a..07d&link_type=abstract
American Geophysical Union, Fall Meeting 2004, abstract #V32A-07
Physics
8450 Planetary Volcanism (5480), 5480 Volcanism (8450), 6061 Remote Sensing, 6218 Jovian Satellites
Scientific paper
Two bodies in the Solar System exhibit high-temperature active volcanism: Earth and Io. Different styles of activity are seen on both planets but a telling point is that in low-spatial-resolution data (corresponding to the bulk of available and foreseeable data of Io) similar styles of effusive and explosive volcanism yield similar mass and flux densities. For example, a square meter of an active pahoehoe flow on Io looks very similar to a square meter of an active pahoehoe flow on Earth. If, from observed thermal emission as a function of wavelength and change in thermal emission with time, the eruption style of an ionian volcano can be constrained, estimates of volumetric fluxes can be made and compared with terrestrial volcanoes using techniques derived for analysing terrestrial remotely-sensed data. In this way we find that ionian volcanoes generally differ from their terrestrial counterparts only in areal extent, with Io volcanoes covering larger area (at least when compared with contemporary terrestrial activity). There is an exception to this rule: Io outbursts eruptions have enormous implied volumetric fluxes, greater than any contemporary terrestrial eruption. This work was carried out at the Jet Propulsion Laboratory-California Institute of Technology, under contract to NASA. AGD is supported by the NASA PG&G Program.
Davies Andrew G.
Keszthelyi Laszlo
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