Greater Climate Sensitivity and Variability on TRAPPIST-1e than Earth

Abstract The atmospheres of rocky exoplanets are close to being characterized by astronomical observations, in part due the commissioning JWST. These observations compel us understand exoplanetary atmospheres, voyage find habitable planets. With this aim, we investigate effect that CO 2 partial pressure (pCO ) has on exoplanets’ climate variability, analyzing results from ExoCAM model simulations tidally locked TRAPPIST-1e exoplanet, an Earth-like aqua-planet, and Earth itself. First, relate differences between planets their elementary parameters. Then, compare sensitivity analog TRAPPIST-1e’s surface temperature precipitation pCO . Our suggest climatology extremes ∼1.5 times more sensitive relative Earth. strongly depends specific region analyzed. Indeed, near mid-latitude equatorial substellar regions is , ∼2 larger TRAPPIST-1e. A dynamical systems perspective, which provides information about how atmosphere evolves phase space, additional insights. Notably, increase atmospheric persistence both planets, than We conclude may be particularly its dayside. This study documents a new pathway for understanding varying planetary parameters have variability potentially