The polar contribution to the heat flow of Io
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文摘
Polar brightness temperatures on Io are higher than expected for any passive surface heated by absorbed sunlight. This discrepancy implies large scale volcanic activity from which we derive a new component of Io's heat flow. We present a ‘Three Component’ thermal background, infrared emission model for Io that includes active polar regions. The widespread polar activity contributes an additional 
0.6 Wm−2 to Io's heat flow budget above the 2.5 Wm−2 from thermal anomalies. Our estimate for Io's global average heat flow increases to 3±1 Wm−2 and 1.3±0.4×1014 watts total.
0.6 Wm−2 to Io's heat flow budget above the 2.5 Wm−2 from thermal anomalies. Our estimate for Io's global average heat flow increases to 3±1 Wm−2 and 1.3±0.4×1014 watts total.