Climate variations on Earth-like circumbinary planets
| Autor: | Siegfried Eggl, Max Popp |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Multidisciplinary
010504 meteorology & atmospheric sciences Science General Physics and Astronomy General Chemistry Double star Forcing (mathematics) 01 natural sciences General Biochemistry Genetics and Molecular Biology Habitability of orange dwarf systems Article Astrobiology Physics::Geophysics Atmosphere Planet Greenhouse gas 0103 physical sciences Environmental science Precipitation Astrophysics::Earth and Planetary Astrophysics Circumbinary planet 010303 astronomy & astrophysics Physics::Atmospheric and Oceanic Physics 0105 earth and related environmental sciences |
| Zdroj: | Nature Communications, Vol 8, Iss 1, Pp 1-12 (2017) Nature Communications |
| ISSN: | 2041-1723 |
| Popis: | The discovery of planets orbiting double stars at close distances has sparked increasing scientific interest in determining whether Earth-analogues can remain habitable in such environments and how their atmospheric dynamics is influenced by the rapidly changing insolation. In this work we present results of the first three-dimensional numerical experiments of a water-rich planet orbiting a double star. We find that the periodic forcing of the atmosphere has a noticeable impact on the planet's climate. Signatures of the forcing frequencies related to the planet's as well as to the binary's orbital periods are present in a variety of climate indicators such as temperature and precipitation, making the interpretation of potential observables challenging. However, for Earth-like greenhouse gas concentrations, the variable forcing does not change the range of insolation values allowing for habitable climates substantially. Large variations in insolation experienced by circumbinary planets raise the question of the habitability of such planets. Here, the authors show that while the changing insolation does not radically affect habitability, it does impact on the planet's climate and on the interpretation of future observations. |
| Databáze: | OpenAIRE |
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