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Table 3
Interannual comparison between abundances of C4H2, C2N2, and C3H4 measured by Voyager I/IRIS in November 1980 (Coustenis & Bezard 1995) and in this study in 2009.
| Latitude | C4H2 | C2N2 | C3H4 | |||
| 1980 | 2009 | 1980 | 2009 | 1980 | 2009 | |
|
|
||||||
| 30°S | 1.3 ± 0.3 × 10-9 | < 6.1 × 10-10 | < 1.5 × 10-9 | – | 4.5 ± 0.7 × 10-9 | 2.3 ± 0.2 × 10-9 |
| 30°N | 1.2 ± 0.4 × 10-9 |
|
< 2.0 × 10-9 |
|
6.0 ± 1.6 × 10-9 |
|
| 50°N | 1.5 ± 0.2 × 10-8 |
|
1.5 ± 0.2 × 10-8 |
|
3 ± 0.2 × 10-8 |
|
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