Exoplanet Atmospheres by Seager, Sara, Deming, Drake

“…At the dawn of the first discovery of exoplanets orbiting Sun-like stars in the mid-1990s, few believed that observations of exoplanet atmospheres would ever be possible. After the 2002 Hubble Space Telescope detection of a transiting exoplanet atmosphere, many skeptics discounted it as a one-object, one-method success. …”
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PHOTOCHEMISTRY IN TERRESTRIAL EXOPLANET ATMOSPHERES. II. H₂S AND SO₂ PHOTOCHEMISTRY IN ANOXIC ATMOSPHERES by Hu, Renyu, Seager, Sara, Bains, William

“…Sulfur gases are common components in the volcanic and biological emission on Earth, and are expected to be important input gases for atmospheres on terrestrial exoplanets. We study the atmospheric composition and the spectra of terrestrial exoplanets with sulfur compounds (i.e., H₂S and SO₂) emitted from their surfaces. …”
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Photosynthesis in Hydrogen-Dominated Atmospheres by Bains, William, Seager, Sara, Zsom, Andras

“…Super-Earth exoplanets are being discovered with increasing frequency, and some will be able to retain a stable, hydrogen-dominated atmosphere. We explore the possibilities for photosynthesis on a rocky planet with a thin H[subscript 2]-dominated atmosphere. …”
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PHOTOCHEMISTRY IN TERRESTRIAL EXOPLANET ATMOSPHERES. III. PHOTOCHEMISTRY AND THERMOCHEMISTRY IN THICK ATMOSPHERES ON SUPER EARTHS AND MINI NEPTUNES by Hu, Renyu, Seager, Sara

“…Some super Earths and mini Neptunes will likely have thick atmospheres that are not H2-dominated. We have developed a photochemistry-thermochemistry kinetic-transport model for exploring the compositions of thick atmospheres on super Earths and mini Neptunes, applicable for both H2-dominated atmospheres and non-H2-dominated atmospheres. …”
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On the Inference of Thermal Inversions in Hot Jupiter Atmospheres by Madhusudhan, Nikku, Seager, Sara

“…Several studies in the recent past have inferred the existence of thermal inversions in some transiting hot Jupiter atmospheres. Given the limited data available, the inference of a thermal inversion depends critically on the chemical composition assumed for the atmosphere. …”
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Atmospheric Retrieval for Super-Earths: Uniquely Constraining the Atmospheric Composition with Transmission Spectroscopy by Benneke, Bjoern, Seager, Sara

“…A new atmospheric parameterization is introduced that is applicable to general atmospheres in which the main constituent is not known a priori and clouds may be present. …”
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A Temperature and Abundance Retrieval Method for Exoplanet Atmospheres by Madhusudhan, Nikku, Seager, Sara

“…We present a new method to retrieve molecular abundances and temperature profiles from exoplanet atmosphere photometry and spectroscopy. We run millions of one-dimensional (1D) atmosphere models in order to cover the large range of allowed parameter space. …”
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BIOSIGNATURE GASES IN H₂-DOMINATED ATMOSPHERES ON ROCKY EXOPLANETS by Seager, Sara, Bains, William, Hu, Renyu

“…Super-Earth exoplanets are being discovered with increasing frequency and some will be able to retain stable H2-dominated atmospheres. We study biosignature gases on exoplanets with thin H2 atmospheres and habitable surface temperatures, using a model atmosphere with photochemistry and a biomass estimate framework for evaluating the plausibility of a range of biosignature gas candidates. …”
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THE ATMOSPHERES OF EARTHLIKE PLANETS AFTER GIANT IMPACT EVENTS by Lupu, R. E., Zahnle, Kevin, Marley, Mark S., Schaefer, Laura, Fegley, Bruce, Morley, Caroline V., Cahoy, Kerri, Freedman, Richard S., Fortney, Jonathan J.

“…The atmospheric chemistry and structure are computed self-consistently for atmospheres in equilibrium with hot surfaces with composition reflecting either the bulk silicate Earth (which includes the crust, mantle, atmosphere, and oceans) or Earth's continental crust. …”
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Response of global soil consumption of atmospheric methane to changes in atmospheric climate and nitrogen deposition by Zhuang, Qianlai, Chen, Min, Xu, Kai, Tang, Jinyun, Saikawa, Eri, Lu, Yanyu, Melillo, Jerry M., McGuire, A. David, Prinn, Ronald G

“…Soil consumption of atmospheric methane plays an important secondary role in regulating the atmospheric CH4 budget, next to the dominant loss mechanism involving reaction with the hydroxyl radical (OH). …”
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Sulfuryl fluoride in the global atmosphere by Muhle, Jens, Huang, J., Weiss, R. F., Miller, Benjamin R., Salameh, P. K., Harth, C. M., Fraser, P. J., Porter, L. W., Greally, B. R., O'Doherty, Simon, Simmonds, P. G., Prinn, Ronald G

“…The first calibrated high-frequency, high-precision, in situ atmospheric and archived air measurements of the fumigant sulfuryl fluoride (SO[subscript 2]F[subscript 2]) have been made as part of the Advanced Global Atmospheric Gas Experiment (AGAGE) program. …”
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Diagnosing the vertical structure of the eddy diffusivity in real and idealized atmospheres by Jansen, Malte Friedrich, Ferrari, Raffaele

“…This result is confirmed in this study using atmospheric reanalysis and idealized numerical simulations. …”
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PCBs in the Arctic atmosphere: determining important driving forces using a global atmospheric transport model by Friedman, Carey, Selin, Noelle E

“…We present a spatially and temporally resolved global atmospheric polychlorinated biphenyl (PCB) model, driven by meteorological data, that is skilled at simulating mean atmospheric PCB concentrations and seasonal cycles in the Northern Hemisphere midlatitudes and mean Arctic concentrations. …”
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Land-atmosphere interactions in an high resolution atmospheric simulation coupled with a surface data assimilation scheme by Entekhabi, Dara, Campo, L., Castelli, F., Caparrini, F.

“…The results of the coupling experiment showed improvements in the reconstruction of the surface states by the atmospheric model and considerable influence on the atmospheric dynamics.…”
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Atmospheric optical communications in the middle ultraviolet. by Reilly, David Monroe

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Atmospheric propagation effects on radio interferometry by Davis, James Louis

Subjects: “…Earth, Atmospheric, and Planetary Sciences.…”
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INFERENCE OF INHOMOGENEOUS CLOUDS IN AN EXOPLANET ATMOSPHERE by Demory, Brice-Olivier, de Wit, Julien, Lewis, Nikole, Fortney, Jonathan J., Zsom, Andras, Seager, Sara, Knutson, Heather A., Heng, Kevin, Madhusudhan, Nikku, Gillon, M., Barclay, Thomas, Desert, Jean-Michel, Parmentier, Vivien, Cowan, Nicolas B.

“…Kepler-7b exhibits several properties that may make it particularly amenable to cloud formation in its upper atmosphere. These include a hot deep atmosphere that avoids a cloud cold trap, very low surface gravity to suppress cloud sedimentation, and a planetary equilibrium temperature in a range that allows for silicate clouds to potentially form in the visible atmosphere probed by Kepler. …”
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Equilibration of an Atmosphere by Adiabatic Eddy Fluxes by Jansen, Malte Friedrich, Ferrari, Raffaele

“…A major question for climate studies is to quantify the role of turbulent eddy fluxes in maintaining the observed atmospheric mean state. Both the equator-to-pole temperature gradient and the static stability of the extratropical atmosphere are set by a balance between these eddy fluxes and the radiative forcing. …”
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Polar vortex formation in giant planet atmospheres under moist convection by Emanuel, Kerry Andrew, Flierl, Glenn Richard, O'Neill, Morgan E

“…We find that the type of shallow polar flow that occurs on a giant planet can be described by the size ratio of small eddies to the planetary radius and the energy density of its atmosphere due to latent heating from moist convection. …”
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PHOTOCHEMISTRY IN TERRESTRIAL EXOPLANET ATMOSPHERES. I. PHOTOCHEMISTRY MODEL AND BENCHMARK CASES by Hu, Renyu, Seager, Sara, Bains, William

“…We simulate several plausible atmospheric scenarios of terrestrial exoplanets and choose three benchmark cases for atmospheres from reducing to oxidizing. …”
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