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Atmospheric circulation of exoplanets information


Atmospheric circulation of a planet is largely specific to the planet in question and the study of atmospheric circulation of exoplanets is a nascent field as direct observations of exoplanet atmospheres are still quite sparse. However, by considering the fundamental principles of fluid dynamics and imposing various limiting assumptions, a theoretical understanding of atmospheric motions can be developed. This theoretical framework can also be applied to planets within the Solar System and compared against direct observations of these planets, which have been studied more extensively than exoplanets, to validate the theory and understand its limitations as well.

The theoretical framework first considers the Navier–Stokes equations, the governing equations of fluid motion. Then, limiting assumptions are imposed to produce simplified models of fluid motion specific to large scale motion atmospheric dynamics. These equations can then be studied for various conditions (i.e. fast vs. slow planetary rotation rate, stably stratified vs. unstably stratified atmosphere) to see how a planet's characteristics would impact its atmospheric circulation. For example, a planet may fall into one of two regimes based on its rotation rate: geostrophic balance or cyclostrophic balance.

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Atmospheric circulation of exoplanets

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Atmospheric circulation of a planet is largely specific to the planet in question and the study of atmospheric circulation of exoplanets is a nascent field...

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Exometeorology

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temperatures for exoplanets (and brown dwarfs) leads to a similar diversity of theorized atmospheric conditions. However, exoplanet detection technology...

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Hadley cell

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The Hadley cell, also known as the Hadley circulation, is a global-scale tropical atmospheric circulation that features air rising near the equator, flowing...

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Extraterrestrial atmosphere

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the behaviour of phosphorus in the atmosphere of brown dwarfs to giant exoplanets is not well understood. The atmospheric circulation of planets that rotate...

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Exoplanet

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is evidence that extragalactic planets, exoplanets located in other galaxies, may exist. The nearest exoplanets are located 4.2 light-years (1.3 parsecs)...

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Adam Showman

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gas giant atmospheric circulation models, and recognized as the world's leading authority in the field of atmospheric dynamics of exoplanets. Showman was...

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Habitable zone for complex life

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has grown to the thousands. Most exoplanets are hot Jupiter planets, that orbit very close the star. Many exoplanets are super-Earths, that could be a...

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Atmosphere

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(oxygen), Io (sulfur), and Enceladus (water vapor). The first exoplanet whose atmospheric composition was determined is HD 209458b, a gas giant with a...

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Ice giant

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of giant exoplanets discovered to be very close to their host stars (pegasean planets) and exoplanets with masses and radii between that of the giant...

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Gas giant

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because the very large atmospheric pressure turns hydrogen into an electrical conductor. The gas giants' cores are thought to consist of heavier elements at...

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Gliese 581g

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are favorable atmospheric conditions on the planet. Gliese 581g was claimed to be detected by astronomers of the Lick–Carnegie Exoplanet Survey. The authors...

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Proxima Centauri b

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Krisztian (8 May 2020). "Atmospheric Convection Plays a Key Role in the Climate of Tidally Locked Terrestrial Exoplanets: Insights from High-resolution...

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Planetary and Space Science

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considered a field of interest for this journal. This includes detection of exoplanets, as well as determining whether or not given exoplanets or exosystems...

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Uranus Orbiter and Probe

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aspects of the Uranus system: How does atmospheric circulation function, from interior to thermosphere, in an ice giant? What is the 3D atmospheric structure...

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Habitability of red dwarf systems

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that efficient heat transfer between the sides of the planet necessitates atmospheric circulation of an atmosphere so thick as to disallow photosynthesis...

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Earth

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weather and climate through redistribution of thermal energy. The primary atmospheric circulation bands consist of the trade winds in the equatorial region...

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Retrograde and prograde motion

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heart regulates the atmospheric circulation: results from high resolution and multi-year numerical climate simulations" (PDF). Journal of Geophysical Research:...

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Nitrous oxide

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oxide's atmospheric concentration reached 333 parts per billion (ppb) in 2020, increasing at a rate of about 1 ppb annually. It is a major scavenger of stratospheric...

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Wind

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two main causes of large-scale atmospheric circulation are the differential heating between the equator and the poles, and the rotation of the planet (Coriolis...

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Cloud

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known to have atmospheric clouds. In October 2013, the detection of high altitude optically thick clouds in the atmosphere of exoplanet Kepler-7b was...

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Comparative planetary science

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across at perihelion. Exoplanets may in turn possess atmospheric properties known and unknown in the Milky Way Galaxy. Atmospheric escape is largely a thermal...

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Aurora

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resulting ionization and excitation of atmospheric constituents emit light of varying colour and complexity. The form of the aurora, occurring within bands...

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Nitrogen

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sources of nitrogen compounds were limited. Natural sources originated either from biology or deposits of nitrates produced by atmospheric reactions...

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