• Corpus ID: 117427053

Ozone Abundance in a Nitrogen-Carbon Dioxide Dominated Terrestrial Paleoatmosphere

@article{Thomas2004OzoneAI,
  title={Ozone Abundance in a Nitrogen-Carbon Dioxide Dominated Terrestrial Paleoatmosphere},
  author={Brian C. Thomas and Adrian L. Melott and L. D. Martin and C. H. Jackman},
  journal={arXiv: Astrophysics},
  year={2004}
}
We compute the ozone distribution for a model terrestrial paleoatmosphere in which the present oxygen abundance is largely replaced by carbon dioxide, which we argue is a reasonable working assumption. In principle, the presence of carbon dioxide might supplement the ozone shield as compared with models based on nitrogen without high carbon dioxide abundance so that early life need not have been as UV-resistant as often assumed. An extrasolar planet with a high-CO2 atmosphere might contain… 
Potential of ozone formation by the smog mechanism to shield the surface of the early Earth from UV radiation
We propose that the photochemical smog mechanism produced substantial ozone (O3) in the troposphere during the Proterozoic period, which contributed to ultraviolet (UV) radiation shielding, and hence
Transit Spectroscopy of the Extrasolar Planet HD 209458b
=== Committee members === Chair: Peter Gierasch. Member: Joseph Harrington (advisor). Minor Member: Warren Allmon. Field Appointed Member: Donald Campbell.

References

SHOWING 1-10 OF 13 REFERENCES
High CO2 levels in the Proterozoic atmosphere estimated from analyses of individual microfossils
TLDR
The results indicate that carbon dioxide was an important greenhouse gas during periods of lower solar luminosity, probably dominating over methane after the atmosphere and hydrosphere became pervasively oxygenated between 2 and 2.2 gigayears ago.
Ozone concentrations and ultraviolet fluxes on Earth-like planets around other stars.
TLDR
Coupled radiative-convective/photochemical modeling was performed for Earth-like planets orbiting different types of stars and found that advanced life is theoretically possible on high-O(2) planets around F stars, but it is not obvious that it would evolve as it did on Earth.
Effect of solar proton events on the middle atmosphere during the past two solar cycles as computed using a two‐dimensional model
Daily average solar proton flux data for the years 1963-1984 (two solar cycles) have been used in a proton energy degradation scheme to derive ion pair production rates and, subsequently, HOx (H, OH,
Photosynthetic microbial mats in the 3,416-Myr-old ocean
TLDR
It is concluded that photosynthetic organisms had evolved and were living in a stratified ocean supersaturated in dissolved silica 3,416 Myr ago.
"Ultraviolet spring" and the ecological consequences of catastrophic impacts
Asteroid and comet impacts cause ozone depletion. For the first time, we have quantified the photobiological characteristics of these events and speculate on some of the associated ecological
Past, present, and future modeled ozone trends with comparisons to observed trends
The NASA Goddard Space Flight Center (GSFC) two-dimensional (2-D) model of stratospheric transport and photochemistry has been used to predict ozone changes that have occurred in the past 20 years
Comparison of model results transporting the odd nitrogen family with results transporting separate odd nitrogen species
We have developed a fast two-dimensional residual circulation stratospheric model. In order to calculate possible effects of long-term changes for trace gases for a large number of scenarios and to
Effects of a polar stratospheric cloud parameterization on ozone depletion due to stratospheric aircraft in a two‐dimensional model
A parameterization of Type 1 and 2 polar stratospheric cloud (PSC) formation is presented which is appropriate for use in two-dimensional (2-D) photochemical models of the stratosphere. The
Simulation of stratospheric tracers using an improved empirically based two-dimensional model transport
We have developed a new empirically based transport formulation for use in our Goddard Space Flight Center (GSFC) two-dimensional chemistry and transport model. In this formulation, we consider much
An introduction to atmospheric radiation
Fundamentals of Radiation for Atmospheric Applications. Solar Radiation at the Top of the Atmosphere. Absorption and Scattering of Solar Radiation in the Atmosphere. Thermal Infrared Radiation
...
...