The recent expansion of Pluto's atmosphere

@article{Elliot2003TheRE,
  title={The recent expansion of Pluto's atmosphere},
  author={James L. Elliot and Alper K. Ateş and Bruce A. Babcock and Amanda S. Bosh and Marc W. Buie and Kelly B. Clancy and Edward Wood Dunham and Stephen S. Eikenberry and Doyle T. Hall and Susan Diane Kern and Sandy K. Leggett and Stephen E. Levine and Dae Seung Moon and Cathy B. Olkin and David James Osip and Jay M. Pasachoff and Bryan Edward Penprase and Michael J. Person and S. Qu and John Rayner and L. C. Roberts and Colette Salyk and Steven P. Souza and Ronald C. Stone and Brian W. Taylor and David J. Tholen and Joanna Elizabeth Thomas-Osip and David Ticehurst and Lawrence H. Wasserman},
  journal={Nature},
  year={2003},
  volume={424},
  pages={165-168}
}
Stellar occultations—the passing of a relatively nearby body in front of a background star—can be used to probe the atmosphere of the closer body with a spatial resolution of a few kilometres (ref. 1). Such observations can yield the scale height, temperature profile, and other information about the structure of the occulting atmosphere. Occultation data acquired for Pluto's atmosphere in 1988 revealed a nearly isothermal atmosphere above a radius of ∼1,215 km. Below this level, the data could… 
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References

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Pluto's atmosphere
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The Prediction and Observation of the 1997 July 18 Stellar Occultation by Triton: More Evidence for Distortion and Increasing Pressure in Triton's Atmosphere
Abstract A variety of CCD astrometric data was used to predict the location of the path for the occultation of the star we have denoted “Tr176” by Triton, which occurred on 1997 July 18, and was
Large changes in Pluto's atmosphere as revealed by recent stellar occultations
TLDR
Data from the first occultations by Pluto since 1988 are reported and it is found that, during the intervening 14 years, there seems to have been a doubling of the atmospheric pressure, a probable seasonal effect on Pluto.
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