The thermal structure of hot gas giant exoplanet atmospheres is likely to be inverted for the hottest planets, a class of planets known as ultra-hot Jupiters. This is the conclusion from astrophysicists based at the University of Amsterdam (UvA) in collaboration with an international team from the United States and the United Kingdom.
Source:
https://phys.org/news/2020-08-statistical-evidence-temperature-inversions-ultra-hot.html