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

Published 2018 March 6 • © 2018. The American Astronomical Society. All rights reserved.
, , Citation Eric T. Wolf 2018 ApJL 855 L14 DOI 10.3847/2041-8213/aab090

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This is a correction for 2017 ApJL 839 L1

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eric.wolf@colorado

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1 Laboratory for Atmospheric and Space Physics, Department of Atmospheric and Oceanic Sciences, University of Colorado, Boulder, CO, USA; eric.wolf@colorado

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  1. Received 2018 February 16
  2. Accepted 2018 February 17
  3. Published

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Due to a coding error the CO2 continuum absorption was incorrectly applied, affecting simulations with 0.2 bar CO2 and greater. Prior conclusions regarding the habitability of TRAPPIST-1f are now changed. While TRAPPIST-1f with 1 bar CO2 still enters a fully glaciated state, the planet can maintain a global mean surface temperature (TS) of 284 K with 2 bar CO2. A corrected version of Figure 2 is included here. With 5 bar CO2, TRAPPIST-1f maintains TS = 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 Ts for simulations with >0.2 bar CO2 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 CO2 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.

Figure 2.

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 CO2 planet f enters a fully glaciated state; however, temperatures close to the present-day Earth are maintained with only 2 bar CO2.

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Figure 3.

Figure 3. Simulations of TRAPPIST-1e. All simulations shown are in equilibrium. Shown are the mean surface temperatures vs. CO2 partial pressure. Red lines indicate simulations containing a 1 bar N2 background, plus additional CO2. Blue lines indicate simulations containing a pure CO2 atmosphere. All simulations also include H2O. Solid lines and diamonds show corrected simulations, while dashed lines indicate previously reported incorrect values.

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E.T. Wolf would like to thank M. Turbet for helpful discussions that aided in tracking down this error.

10.3847/2041-8213/aab090