Table 1
Water production and erosion for all models.
| Model A | Model B | Model C | |
|
|
|||
| Total H2O production for one orbit [kg] | 6.5 × 1010 | 4.9 × 1010 | 1.5 × 1010 |
| Production per unit surface [kg m-2] | 1.3 × 103 | 1.0 × 103 | 3.1 × 102 |
| Erosion [m] | 2.9 | 2.2 | 0.67 |
| Maximum erosion [m] | 4.8 | 4.0 | 1.1 |
| Production during southern summera [kg] | 4.7 × 1010 (73%)b | 3.9 × 1010 (79%) | 1.1 × 1010 (73%) |
Notes. Production and erosion are averaged over the surface. Erosion is calculated as P/ (ρA) where P is the total H2O production, ρ = 470 [kg m-3] is the density of the nucleus, and A = 4.82 × 107 [m2] is the total surface area. Here we assume that the nucleus is 100% H2O ice. Erosion rates for a dust-to-ice ratio of 4 (Rotundi et al. 2015) would be 5 times larger.
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