Publication Abstracts

Way et al. 2018

Way, M.J., A.D. Del Genio, I. Aleinov, T.L. Clune, M. Kelley, and N.Y. Kiang, 2018: Climates of warm Earth-like planets I: 3-D model simulations. Astrophys. J. Supp. Ser., 239, no. 2, 24, doi:10.3847/1538-4365/aae9e1.

We present a large ensemble of simulations of an Earth-like world with increasing insolation and rotation rate. Unlike previous work utilizing idealized aquaplanet configurations, we focus our simulations on modern Earth-like topography. The orbital period is the same as that of modern Earth, but with zero obliquity and eccentricity. The atmosphere is 1 bar N2-dominated with CO2 = 400 ppmv and CH4 = 1 ppmv. The simulations include two types of oceans: one without ocean heat transport (OHT) between grid cells, as has been commonly used in the exoplanet literature, and the other a fully coupled dynamic bathtub type ocean. The dynamical regime transitions that occur as day length increases induce climate feedbacks producing cooler temperatures, first via the reduction of water vapor with increasing rotation period despite decreasing shortwave cooling by clouds, and then via decreasing water vapor and increasing shortwave cloud cooling, except at the highest insolations. Simulations without OHT are more sensitive to insolation changes for fast rotations, while slower rotations are relatively insensitive to ocean choice. OHT runs with faster rotations tend to be similar with gyres transporting heat poleward, making them warmer than those without OHT. For slower rotations OHT is directed equatorward and no high-latitude gyres are apparent. Uncertainties in cloud parameterization preclude a precise determination of habitability but do not affect robust aspects of exoplanet climate sensitivity. This is the first paper in a series that will investigate aspects of habitability in the simulations presented herein. The data sets from this study are open source and publicly available.

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BibTeX Citation

  author={Way, M. J. and Del Genio, A. D. and Aleinov, I. and Clune, T. L. and Kelley, M. and Kiang, N. Y.},
  title={Climates of warm Earth-like planets I: 3-D model simulations},
  journal={Astrophysical Journal Supplement Series},

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RIS Citation

ID  - wa08700a
AU  - Way, M. J.
AU  - Del Genio, A. D.
AU  - Aleinov, I.
AU  - Clune, T. L.
AU  - Kelley, M.
AU  - Kiang, N. Y.
PY  - 2018
TI  - Climates of warm Earth-like planets I: 3-D model simulations
JA  - Astrophys. J. Supp. Ser.
JO  - Astrophysical Journal Supplement Series
VL  - 239
IS  - 2
SP  - 24
DO  - 10.3847/1538-4365/aae9e1
ER  -

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