296 citations · 1.8k across the 34 of their papers we have counts for
34 papers
The Runaway Greenhouse Effect on Hycean Worlds
Hamish Innes, Shang-Min Tsai, Raymond T. Pierrehumbert
Hycean worlds are a proposed subset of sub-Neptune exoplanets with substantial water inventories, liquid surface oceans and extended hydrogen-dominated atmospheres that could be fa…
The runaway greenhouse on subNeptune waterworlds
Raymond T. Pierrehumbert
The implications of the water vapor runaway greenhouse phenomenon for water-rich subNeptunes are developed. In particular, the nature of the post-runaway equilibration process for…
CO ocean bistability on terrestrial exoplanets
R. J. Graham, Tim Lichtenberg, Ray Pierrehumbert
Cycling of carbon dioxide between the atmosphere and interior of rocky planets can stabilize global climate and enable planetary surface temperatures above freezing over geologic t…
The Climate and Compositional Variation of the Highly Eccentric Planet HD 80606 b -- the rise and fall of carbon monoxide and elemental sulfur
Shang-Min Tsai, Maria Steinrueck, Vivien Parmentier +2
The gas giant HD 80606 b has a highly eccentric orbit (e 0.93). The variation due to the rapid shift of stellar irradiation provides a unique opportunity to probe the physic…
The impact of ultraviolet heating and cooling on the dynamics and observability of lava planet atmospheres
T. Giang Nguyen, Nicolas B. Cowan, Raymond T. Pierrehumbert +2
Lava planets have non-global, condensible atmospheres similar to icy bodies within the solar system. Because they depend on interior dynamics, studying the atmospheres of lava plan…
Cloud-convection feedback in brown dwarfs atmosphere
Maxence Lefèvre, Xianyu Tan, Elspeth K. H. Lee +1
Numerous observational evidence has suggested the presence of active meteorology in the atmospheres of brown dwarfs. A near-infrared brightness variability has been observed. Cloud…
K2 and Spitzer phase curves of the rocky ultra-short-period planet K2-141 b hint at a tenuous rock vapor atmosphere
S. Zieba, M. Zilinskas, L. Kreidberg +11
K2-141 b is a transiting, small (1.5 Re) ultra-short-period (USP) planet discovered by Kepler orbiting a K-dwarf host star every 6.7 hours. The planet's high surface temperature ma…
Atmospheric dynamics of temperate sub-Neptunes. Part I: dry dynamics
Hamish Innes, Raymond T. Pierrehumbert
Sub-Neptunes (planets with radii between 2 and 4 R) are abundant around M-dwarf stars, yet the atmospheric dynamics of these planets is relatively unexplored. In this pa…
Convection modeling of pure-steam atmospheres
Xianyu Tan, Maxence Lefevre, Raymond Pierrehumbert
Condensable species are crucial in shaping planetary climate. A wide range of planetary climate systems involve understanding non-dilute condensable substances and their influence…
Inferring Shallow Surfaces on sub-Neptune Exoplanets with JWST
Shang-Min Tsai, Hamish Innes, Tim Lichtenberg +4
Planets smaller than Neptune and larger than Earth make up the majority of the discovered exoplanets. Those with H-rich atmospheres are prime targets for atmospheric characteri…
A multispecies pseudoadiabat for simulating condensable-rich exoplanet atmospheres
R. J. Graham, Tim Lichtenberg, Ryan Boukrouche +1
Central stages in the evolution of rocky, potentially habitable planets may play out under atmospheric conditions with a large inventory of non-dilute condensable components. Varia…
Beyond runaway: initiation of the post-runaway greenhouse state on rocky exoplanets
Ryan Boukrouche, Tim Lichtenberg, Raymond T. Pierrehumbert
The runaway greenhouse represents the ultimate climate catastrophe for rocky, Earth-like worlds: when the incoming stellar flux cannot be balanced by radiation to space, the oceans…
Simulating gas giant exoplanet atmospheres with Exo-FMS: Comparing semi-grey, picket fence and correlated-k radiative-transfer schemes
Elspeth K. H. Lee, Vivien Parmentier, Mark Hammond +5
Radiative-transfer (RT) is a fundamental part of modelling exoplanet atmospheres with general circulation models (GCMs). An accurate RT scheme is required for estimates of the atmo…
3D convection-resolving model of temperate, tidally-locked exoplanets
Maxence Lefèvre, Martin Turbet, Raymond Pierrehumbert
A large fraction of known terrestrial-size exoplanets located in the Habitable Zone of M-dwarfs are expected to be tidally-locked. Numerous efforts have been conducted to study the…
Evidence for disequilibrium chemistry from vertical mixing in hot Jupiter atmospheres. A comprehensive survey of transiting close-in gas giant exoplanets with warm-Spitzer/IRAC
C. Baxter, J-M. Désert, S-M. Tsai +10
[Abridged] Aims. We present a large atmospheric study of 49 gas giant exoplanets using infrared transmission photometry with Spitzer/IRAC at 3.6 and 4.5um. Methods. We uniformly an…
Vertically resolved magma ocean-protoatmosphere evolution: H, HO, CO, CH, CO, O, and N as primary absorbers
Tim Lichtenberg, Dan J. Bower, Mark Hammond +4
The earliest atmospheres of rocky planets originate from extensive volatile release during magma ocean epochs that occur during assembly of the planet. These establish the initial…
The Phase-curve Signature of Condensible Water-rich Atmospheres on Slowly Rotating Tidally Locked Exoplanets
Feng Ding, Raymond T. Pierrehumbert
We use an idealized three-dimensional general circulation model to study condensible-rich atmospheres with an ineffective cold trap on slowly rotating tidally locked terrestrial pl…
The Equatorial Jet Speed on Tidally Locked Planets: I -- Terrestrial Planets
Mark Hammond, Shang-Min Tsai, Raymond T. Pierrehumbert
The atmospheric circulation of tidally locked planets is dominated by a superrotating eastward equatorial jet. We develop a predictive theory for the formation of this jet, proposi…
Thermodynamic and Energetic Limits on Continental Silicate Weathering Strongly Impact the Climate and Habitability of Wet, Rocky Worlds
R. J. Graham, R. T. Pierrehumbert
The "liquid water habitable zone" (HZ) concept is predicated on the ability of the silicate weathering feedback to stabilize climate across a wide range of instellations. However,…
Simplified 3D GCM modelling of the irradiated brown dwarf WD0137-349B
Elspeth K. H. Lee, Sarah L. Casewell, Katy L. Chubb +4
Context: White dwarf - Brown dwarf short period binaries (P 2 hours) are some of the most extreme irradiated atmospheric environments known. These systems of…
Wave-Mean Flow Interactions in the Atmospheric Circulation of Tidally Locked Planets
Mark Hammond, Raymond T. Pierrehumbert
We use a linear shallow-water model to investigate the global circulation of the atmospheres of tidally locked planets. Simulations, observations, and simple models show that if th…
Global or Local Pure-Condensible Atmospheres: Importance of Horizontal Latent Heat Transport
Feng Ding, Raymond T. Pierrehumbert
The distribution of a pure condensible planetary atmosphere in equilibrium with a surface reservoir is revisited employing the energy budget of the climate system, emphasizing the…
Exploring the Atmosphere of Neoproterozoic Earth: The Effect of O on Haze Formation and Composition
Sarah M. Hörst, Chao He, Melissa S. Ugelow +3
Previous studies of haze formation in the atmosphere of the Early Earth have focused on N/CO/CH atmospheres. Here, we experimentally investigate the effect of O$_…
Exoplanet Diversity in the Era of Space-based Direct Imaging Missions
Ravi Kopparapu, Eric Hebrard, Rus Belikov +55
This whitepaper discusses the diversity of exoplanets that could be detected by future observations, so that comparative exoplanetology can be performed in the upcoming era of larg…