You are watching: Why do uranus and neptune have blue methane clouds but jupiter and saturn do not?
Sections:Atmospheric Structure and also CloudsJovian Planet WeatherClimate and Weather on JupiterRelated linksRelated Lessons:Great Red Spot PinwheelHappy Landings: A Splash or a Splat?
The atmospheric structures of the four jovian planets are all quite comparable. The main difference is that the environments obtain increasingly cooler via boosting distance from the Sun. Notice on the diagram that clouds of a details complace always occur at about the exact same temperature. For instance, the ammonia clouds on both Jupiter and also Sarotate form at an atmospheric temperature of around 150 K. This happens to be approximately 25 km listed below the cloud peak on Jupiter and 100 kilometres below the cloud optimal on Sarevolve.
Each jovian world has distinct cloud layers, through altitudes dictated by the atmospheric levels at which various gases deserve to conthick into liquid dropallows or solid flakes.JUPITER AND SATURN CLOUD LAYERS:Ammonia clouds (150° K)Ammonium Hydrosulfide clouds (200° K)Water clouds (270° K)
Because Saturn"s setting is cooler than Jupiter"s at any type of specific altitude, the various cloud layers take place deeper within Saturn"s setting.
URANUS AND NEPTUNE CLOUD LAYERS:Methane clouds (75 K)
Methane deserve to condense in the extremely cold upper tropospbelow of Uranus and of Neptune, however not in the warmer troposphere of Jupiter or Sarotate.
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JOVIAN PLANET WEATHER
Jupiter"s weather sensations (clouds, winds storms) are by much the strongest and also most energetic of the jovian planets, yet weather is uncovered on all four.
Like Jupiter, Sarotate has stripes of alternating shade and also wind direction, though in even more subdued colors. Even though Sarevolve has actually an axis tilt comparable to that of Earth, we don"t watch the dramatic periods we might suppose. Some weather changes have been oboffered, yet Saturn"s internal heat keeps temperatures about the exact same year-round and planet-wide.
Uranus is fundamentally tipped on its side so we would certainly suppose it to go with too much seasonal changes during its 84-year orbit around the Sun. When Voyager 2 flew previous in 1986, Uranus"s north hemisphere was dealing with virtually directly towards the Sun, and also its southern hemispright here remained in perpetual darkness. Photographs revealed basically no clouds and also no banded structures choose those uncovered on the other jovian planets. More recent monitorings display storms in Uranus"s setting. The storms may be unavoidable bereason of the altering seasons as the southern hemispbelow sees sunlight for the first time in decades.
Neptune"s environment is banded, and has a high-press storm, dubbed the Great Dark Spot, that is comparable to Jupiter"s Great Red Spot. The Great Dark Spot disappeared in 1994, however was reinserted with a comparable storm soon after. Like Sarevolve, Neptune has an axis tilt similar to Earth"s but it has fairly bit seasonal adjust bereason of its inner warm. The warmth created in Neptune"s interior is released uniformly and keeps the temperature around the very same year-round and planet-wide.
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CLIMATE AND WEATHER ON JUPITER
Jupiter"s most renowned attribute is its Great Red Spot, which is visible in Jupiter"s southern hemispbelow. The Great Red Spot is even more than twice as wide as Earth.
Jupiter"s climate is secure and also the majority of likely unaltering considering that it has no appreciable axis tilt and, therefore, no periods. Solar heating alone could leave the poles relatively cool, but interior warmth keeps the world uniformly warmth.
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RELATED LINKSJupiter Atmospbelow Images at nlinux.orgThe Juno New Frontiers Mission Official Homepage
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