Exploring Trappist-1d with a 3D GCM

Trappist-1d remains an underexplored planets in the fascinating multi-planet Trappist-1 system.Some earlier studies have indicated that it may be more of an exo-Venus than an exo-Earth [1,2].Of course atmospheric composition and density plays a key role and this parameter spacehas barely been explored. As well, since these earlier studies the insolation of 1d appearsto be almost 1% lower than earlier estimates [3,4]. A subsequent 1D study using thelower insolation [5] finds one atmospheric composition places it in the habitable zone,while the other in the Venus-Zone [6].  We use the ROCKE-3D General Circulation Model [7] to examine Trappist-1d's possible climate. [1] Wolf, E.T. (2017) ApJ 839:L1[2] Turbet et al. (2018) A&A 612, A86[3] Gillon et al. (2017) Nature 542, 456[4] Agol et al. (2021) PSJ 2:1[5] Meadows et al. (2023) PSJ 4:10[6] Kane, S.R. et al. (2021) AJ 161:53[7] Way, M.J. et al. (2017) ApJS 213:12