Possible tropical lakes on Titan from observations of dark terrain

@article{Griffith2012PossibleTL,
  title={Possible tropical lakes on Titan from observations of dark terrain},
  author={Caitlin Ann Griffith and Juan Manuel Lora and Jake D. Turner and Paulo Fernando Penteado and Robert H. Brown and Martin George Tomasko and Lyn Doose and Charles See},
  journal={Nature},
  year={2012},
  volume={486},
  pages={237-239}
}
Titan has clouds, rain and lakes—like Earth—but composed of methane rather than water. Unlike Earth, most of the condensable methane (the equivalent of 5 m depth globally averaged) lies in the atmosphere. Liquid detected on the surface (about 2 m deep) has been found by radar images only poleward of 50° latitude, while dune fields pervade the tropics. General circulation models explain this dichotomy, predicting that methane efficiently migrates to the poles from these lower latitudes. Here we… 
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