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The Relationship Between a Variable Orbital Eccentricity and Climate on an Earth-Like Planet
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
2019 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
Förhållandet mellan en variabel excentricitet och klimat på en jordliknande planet (Swedish)
Abstract [en]

By using climate models based on the Earth’s climate, you can get information about how the climate on exoplanets can look like. ROCKE-3D is a general circulation model based on ModelE2, which is used for simulations of modern and prehistoric Earth’s climate. ROCKE-3D, on the other hand, is used to simulate terrestrial planets both in our solar system and around other stars. The orbital eccentricity affects a planet’s climate, if the eccentricity is high, the planet will be closer to its star certain parts of the year and further away from it for other parts. Because of this, it is interesting to study the eccentricity’s influence on the climate of exoplanets, especially since the boundaries of the habitable zone change. In this report, the climate of an Earth-like planet with varying orbital eccentricity has been investigated using ROCKE-3D. The results show that the annual average temperature increased if the eccentricity increased, even though it was expected to decrease because the planet was further away from its star for longer periods than it was closer. The reason for this was that the ocean dampened the surface temperature drop. The amount of snow and ice was also examined. As eccentricity increased, the ocean ice became thicker and snow accumulated in the northern hemisphere. This can be explained, even though the annual average temperature increased due to the warmer winters, by the fact that the temperature in the summer decreased so much that the snow and ocean ice did not melt away completely and started to accumulate for the years with higher eccentricities.

Place, publisher, year, edition, pages
2019.
Series
Självständigt arbete vid Institutionen för geovetenskaper ; 2019: 24
Keywords [en]
climate, climate models, exoplanets, Earth-like planets
Keywords [sv]
klimat, klimatmodeller, exoplaneter, jordliknande planeter
National Category
Meteorology and Atmospheric Sciences
Identifiers
URN: urn:nbn:se:uu:diva-388151OAI: oai:DiVA.org:uu-388151DiVA, id: diva2:1331891
Subject / course
Meteorology
Educational program
Bachelor Programme in Physics
Supervisors
Examiners
Available from: 2019-07-09 Created: 2019-06-27 Last updated: 2019-07-09Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • ieee
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