The Phase Composition of Triton's Polar Caps

@article{Duxbury1993ThePC,
  title={The Phase Composition of Triton's Polar Caps},
  author={N. S. Duxbury and R. Hamilton Brown},
  journal={Science},
  year={1993},
  volume={261},
  pages={748 - 751}
}
Triton's polar caps are modeled as permanent nitrogen deposits hundreds of meters thick. Complex temperature variations on Triton's surface induce reversible transitions between the cubic and hexagonal phases of solid nitrogen, often with two coexisting propagating transition fronts. Subsurface temperature distributions are calculated using a two-dimensional thermal model with phase changes. The phase changes fracture the upper nitrogen layer, increasing its reflectivity and thus offering an… 

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References

SHOWING 1-10 OF 14 REFERENCES

Spectroscopic Determination of the Phase Composition and Temperature of Nitrogen Ice on Triton

The surface temperature of Triton is found to be 38.0+2.0–1.0 K, in agreement with previous temperature estimates and measurements, and there is no spectral evidence for the presence of α-nitrogen onTriton's surface, indicating that there is less than 10 percent carbon monoxide in solid solution with the nitrogen on the surface.

Triton's Global Heat Budget

Indications of recent global albedo change on Triton suggest that Trit on's surface temperature and pressure may not now be in steady state, further suggesting that atmospheric pressure onTriton was as much as ten times higher in the recent past.

Ices on the Surface of Triton

The near-infrared spectrum of Triton reveals ices of nitrogen, methane, carbon monoxide, and carbon dioxide, of which nitrogen is the dominant component, which challenges existing models of methane and nitrogen photochemistry on Tritons.

Nitrogen on Triton

Subsurface Energy Storage and Transport for Solar-Powered Geysers on Triton

The location of active geyser-like eruptions and related features close to the current subsolar latitude on Triton suggests a solar energy source for these phenomena and a variety of models for the storage of solar energy in a sub-greenhouse layer and for the supply of gas and energy to a geysers are examined.

NITROGEN FROST MIGRATION ON TRITON: A historical model

I present the results of numerical simulation of the seasonal migration of nitrogen frost on Triton constrained by Voyager observations of atmospheric pressure, temperature, and albedo distribution.

Voyager 2 at Neptune: Imaging Science Results

Voyager 2 images of Neptune reveal a windy planet characterized by bright clouds of methane ice suspended in an exceptionally clear atmosphere above a lower deck of hydrogen sulfide or ammonia ices.