The greenhouse and antigreenhouse effects on Titan

  title={The greenhouse and antigreenhouse effects on Titan},
  author={C P McKay and J. B. Pollack and R{\'e}gis Courtin},
  pages={1118 - 1121}
There are many parallels between the atmospheric thermal structure of the Saturnian satellite Titan and the terrestrial greenhouse effect; these parallels provide a comparison for theories of the heat balance of Earth. Titan's atmosphere has a greenhouse effect caused primarily by pressure-induced opacity of N2, CH4, and H2. H2 is a key absorber because it is primarily responsible for the absorption in the wave number 400 to 600 cm-1 "window" region of Titan's infrared spectrum. The… 
Analytic Solutions for the Antigreenhouse Effect: Titan and the Early Earth
Abstract The antigreenhouse effect results from a high altitude haze which blocks sunlight while allowing transmission of thermal infrared. An antigreenhouse is observed on Titan and has been
The effect of atmospheric absorption of sunlight on the runaway greenhouse point
[1] The longwave emission of planetary atmospheres that contain a condensable absorbing gas in the infrared (i.e., longwave), which is in equilibrium with its liquid phase at the surface, may exhibit
The composition of Titans atmosphere : a meteorological perspective
Abstract One of the most important and intriguing issues concerning Titans atmosphere is the methane cycle. Although the broad outline of the breakup of methane by photolytic and catalytic
Models for the origin of Titan’s atmosphere, the processing of the atmosphere and surface and its exobiological role are reviewed. Titan has gained widespread acceptance in the origin of life field
UV shielding of NH3 and O2 by organic hazes in the Archean atmosphere
The late Archean atmosphere was probably rich in biologically generated CH4 and may well have contained a hydrocarbon haze layer similar to that observed today on Saturn's moon, Titan. Here we
Coupling photochemistry with haze formation in Titan ’ s atmosphere , Part I : Model description
We introduce a new 1D coupled Radiative/Convective-Photochemical-Microphysical model for a planetary atmosphere and apply it to Titan. The model incorporates detailed radiation transfer calculations
Coupling photochemistry with haze formation in Titan's atmosphere, Part I: Model description
Abstract We introduce a new 1D coupled Radiative/Convective-Photochemical-Microphysical model for a planetary atmosphere and apply it to Titan. The model incorporates detailed radiation transfer
Earth’s outgoing longwave radiation linear due to H2O greenhouse effect
  • D. Koll, T. Cronin
  • Environmental Science, Medicine
    Proceedings of the National Academy of Sciences
  • 2018
A simple semianalytical model is presented that explains Earth’s linear OLR as an emergent property of an atmosphere whose greenhouse effect is dominated by a condensable gas and suggests that extrasolar planets with other condensable greenhouse gases could have climate dynamics similar to Earth's.
Physical properties of the organic aerosols and clouds on Titan
Titan’s haze is optically thick in the visible, with an optical depth at 0:5 m of about three. The haze varies with latitude in a seasonal cycle and has a detached upper layer. Microphysical models,
Titan's atmosphere and climate
Titan is the only moon with a substantial atmosphere, the only other thick N2 atmosphere besides Earth's, the site of extraordinarily complex atmospheric chemistry that far surpasses any other solar


Methane rain on Titan
Abstract We use a new set of absorption coefficients for methane, hydrogen, and nitrogen, as well as refractive indices of haze and methane clouds, in a multiple scattering radiative transfer model
The thermal structure of Titan's atmosphere.
It is concluded that the most important factors controlling Titan's thermal structure are absorption of sunlight by the stratospheric haze and the pressure-induced gas opacity in the infrared.
Titan aerosols: Optical properties and vertical distribution
An analysis of Titan's solar phase variation as a function of wavelength together with the continuum geometric albedo makes it possible to set limits on the real part of the refractive index and on
Production and condensation of organic gases in the atmosphere of Titan
The rates and altitudes for the dissociation of atmospheric constituents of Titan are calculated for solar UV, solar wind protons, interplanetary electrons, Saturn magnetospheric particles, and
Optical constants of organic tholins produced in a simulated Titanian atmosphere: From soft x-ray to microwave frequencies
As part of a continuing series of experiments on the production of dark reddish organic solids, called tholins, by irradiation of cosmically abundant reducing gases, the synthesis from a simulated
Radar Reflectivity of Titan
The present understanding of the atmosphere and surface conditions on Saturn's largest moon, Titan, including the stability of methane, and an application of thermodynamics leads to a strong
Titan's atmosphere and hypothesized ocean: A reanalysis of the Voyager 1 radio-occultation and IRIS 7.7-μm data
Voyager1 radio-occultation refractivity profiles of Titan in the 0–200 km altitude range are reanalyzed in order to derive limiting profiles for the equatorial thermal structure, taking into account
Voyager 2 photopolarimeter observations of Titan
Observations of Titan's whole disk polarization at 2460 and 7500 A are presented and analyzed in terms of model scattering atmospheres. If the Titan aerosols are spherical or nearly spherical, no
Environmental Effects of an Impact-Generated Dust Cloud: Implications for the Cretaceous-Tertiary Extinctions
A model of the evolution and radiative effects of a debris cloud from a hypothesized impact event at the Cretaceous-Tertiary boundary suggests that the cloud could have reduced the amount of light at
Nuclear Winter: Global Consequences of Multple Nuclear Explosions
The potential global atmospheric and climatic consequences of nuclear war are investigated using models previously developed to study the effects of volcanic eruptions, finding long-term exposure to cold, dark, and radioactivity could pose a serious threat to human survivors and to other species.