Pressure tripled between 1988 and 2016.
Pluto atmosphere tracked over three decades
Ground-based occultations trace pressure evolution in Pluto s tenuous atmosphere.

Reference
sdsadsa · doi:32das6+54dsa6
Ground-based occultations trace pressure evolution in Pluto s tenuous atmosphere.

Pressure tripled between 1988 and 2016.
sdsadsa · doi:32das6+54dsa6