Erratum: “Assessing the Habitability of the TRAPPIST-1 System Using a 3D Climate Model” (2017, ApJL, 839, L1)

Abstract

Due to a coding error the CO 2 continuum absorption was incorrectly applied, affecting simulations with 0.2 bar CO 2 and greater. Prior conclusions regarding the habitability of TRAPPIST-1f are now changed. While TRAPPIST-1f with 1 bar CO 2 still enters a fully glaciated state, the planet can maintain a global mean surface temperature (T S) of 284 K with 2 bar CO 2. A corrected version of Figure 2 is included here. With 5 bar CO 2 , TRAPPIST-1f maintains T S =334 K, in close agreement with results from the LMD Generic Global Climate Model (M. Turbet 2018, personal communication). Conclusions regarding TRAPPIST-1e are qualitatively unchanged; however, previously reported T s for simulations with >0.2 bar CO 2 were underestimated. A corrected version of Figure 3(a) is included here. Conclusions regarding TRAPPIST-1d are unaffected. Conclusions regarding thermal and reflected light phase curves yielded from different climate states are also unchanged. Although, the amount of CO 2 required to drive different climate states is changed as described in the corrected Figures 2 and 3 included here. Finally, note that this error is confirmed to be isolated to this work and was not present in previous works by the author. E.T. Wolf would like to thank M. Turbet for helpful discussions that aided in tracking down this error. Figure 2. Time series model outputs from simulations of TRAPPIST-1f. Panel (a) shows the mean surface temperatures. Panel (b) shows percent sea-ice coverage. With 1 bar CO 2 planet f enters a fully glaciated state; however, temperatures close to the present-day Earth are maintained with only 2 bar CO 2 .