The Effect of Land Albedo on the Climate of Land-dominated Planets in the TRAPPIST-1 System

@article{Rushby2020TheEO,
  title={The Effect of Land Albedo on the Climate of Land-dominated Planets in the TRAPPIST-1 System},
  author={Andrew J. Rushby and Aomawa L. Shields and Eric T. Wolf and Marysa M. Lagu{\"e} and Adam J. Burgasser},
  journal={arXiv: Earth and Planetary Astrophysics},
  year={2020}
}
Variations in the reflective properties of the bulk material that comprises the surface of land-dominated planets will affect the planetary energy balance by interacting differently with incident radiation from the host star. Furthermore, low-mass cool stars, such as nearby M8V dwarf TRAPPIST-1, emit a significant fraction of their flux in longer wavelengths relative to the Sun in regions where terrestrial materials may exhibit additional variability in albedo. Using the Community Earth System… 
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References

SHOWING 1-10 OF 43 REFERENCES
The Effect of Land Fraction and Host Star Spectral Energy Distribution on the Planetary Albedo of Terrestrial Worlds
The energy balance and climate of planets can be affected by the reflective properties of their land, ocean, and frozen surfaces. Here we investigate the effect of host star spectral energy
The effect of host star spectral energy distribution and ice-albedo feedback on the climate of extrasolar planets.
TLDR
It is shown that ∼3-10 bar of CO(2) will entirely mask the climatic effect of ice andSnow, leaving the outer limits of the habitable zone unaffected by the spectral dependence of water ice and snow albedo, and the surface ice-albedo feedback effect becomes less important at the outer edge of the inhabited zone.
Hydrohalite Salt-albedo Feedback Could Cool M-dwarf Planets
A possible surface type that may form in the environments of M-dwarf planets is sodium chloride dihydrate, or "hydrohalite" (NaCl $\cdot$ 2H$_2$O), which can precipitate in bare sea ice at low
Evolved Climates and Observational Discriminants for the TRAPPIST-1 Planetary System
The TRAPPIST-1 planetary system provides an unprecedented opportunity to study terrestrial exoplanet evolution with the James Webb Space Telescope (JWST) and ground-based observatories. Since M dwarf
Habitable Moist Atmospheres On Terrestrial Planets Near the Inner Edge Of the Habitable Zone Around M-dwarfs
Terrestrial planets in the habitable zones (HZs) of low-mass stars and cool dwarfs have received significant scrutiny recently because their shorter orbital periods increase their chances of
3D climate modeling of close-in land planets: Circulation patterns, climate moist bistability and habitability
The inner edge of the classical habitable zone is often defined by the critical flux needed to trigger the runaway greenhouse instability. This 1D notion of a critical flux, however, may not be so
Spectrum-driven Planetary Deglaciation Due to Increases in Stellar Luminosity
Distant planets in globally ice-covered, "snowball", states may depend on increases in their host stars' luminosity to become hospitable for surface life. Using a General Circulation Model (GCM), we
The Climates of Other Worlds: A Review of the Emerging Field of Exoplanet Climatology
The discovery of planets orbiting stars other than the Sun has accelerated over the past decade, and this trend will continue as new space- and ground-based observatories employ next-generation
The albedo of Earth
The fraction of the incoming solar energy scattered by Earth back to space is referred to as the planetary albedo. This reflected energy is a fundamental component of the Earth's energy balance, and
Seven temperate terrestrial planets around the nearby ultracool dwarf star TRAPPIST-1
TLDR
The observations reveal that at least seven planets with sizes and masses similar to those of Earth revolve around TRAPPIST-1, and the six inner planets form a near-resonant chain, such that their orbital periods are near-ratios of small integers.
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