Publication Date:
2019-08-28
Description:
It is presently shown that the ratio of ethane emission to methane emission in Neptune's 7-14 micron spectrum increased by a factor of 1.47 +/- 0.11 in the period between 1985 and 1991, and that the 12.2-micron ethan feature (rather than that of methane at 7.7 microns) is implicated in the greater part of that change. It is speculated that this variation is due either to a nonuniform increase in stratospheric temperature, or (more likely) to an increase in the ethane concentration by over 15 percent.
Keywords:
LUNAR AND PLANETARY EXPLORATION
Type:
Icarus (ISSN 0019-1035); 99; 2; p. 347-352.
Format:
text
Permalink