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Detailed Reference Information |
Blaney, D.L., Veeder, G.J., Matson, D.L., Johnson, T.V., Goguen, J.D. and Spencer, J.R. (1997). Io's thermal anomalies: Clues to their origins from comparison of ground based observations between 1 and 20 µm. Geophysical Research Letters 24: doi: 10.1029/97GL02509. issn: 0094-8276. |
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Io's thermal emission for 1995 from eclipse photometry at 2.2 &mgr;m; broad band radiometry at 4.8 &mgr;m, 8.7 &mgr;m and 20 &mgr;m; and in eclipse imaging between 1.7 and 5 &mgr;m are compared. The variability of thermal emission from Io at wavelengths between 1--5 &mgr;m (Silverstone et al., 1995; Spencer et al., 1997) is in agreement with the expected variability based on the 13 year record presented in Veeder et al. (1994) and Goguen et al. (1996). We conclude that 1995 was typical for Io, in terms of overall observed variability in the volcanic sources. Detailed comparison of data from Goguen et al. on Aug. 24 and Spencer et al. on Aug. 26 provides evidence of a high temperature eruption that produced a larger, cooler region over the course of two days. The observed frequency of occurrence of high temperature events, the linking of high and lower temperature thermal anomalies, and the observed stability of volcanic regions since Voyager suggests that high temperature silicate eruptions could support the entire observed population of cooler temperature anomalies. It may be more productive to consider sulfur flows on Io in the context of remobilization of existing sulfur deposits.¿ 1997 American Geophysical Union |
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Abstract |
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Keywords
Planetology, Solid Surface Planets, Volcanism, Planetology, Solid Surface Planets, Surface materials and properties, Planetology, Solid Surface Planets, Composition |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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