File:Thermal tides at Mars.jpg
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editDescriptionThermal tides at Mars.jpg |
English: Thermal Tides at Mars
This diagram illustrates Mars' "thermal tides," a weather phenomenon responsible for large, daily variations in pressure at the Martian surface. Sunlight heats the surface and atmosphere on the day side of the planet, causing air to expand upwards. At higher levels in the atmosphere, this bulge of air then expands outward, to the sides, in order to equalize the pressure around it, as shown by the red arrows. Air flows out of the bulge, lowering the pressure of air felt at the surface below the bulge. The result is a deeper atmosphere, but one that is less dense and has a lower pressure at the surface, than that on the night side of the planet. As Mars rotates beneath the sun, this bulge moves across the planet each day, from east to west. A fixed observer, such as NASA's Curiosity rover, measures a decrease in pressure during the day, followed by an increase in pressure at night. The precise timing of the increase and decrease are affected by the time it takes the atmosphere to respond to the sunlight, as well as a number of other factors including the shape of the planet's surface and the amount of dust in the atmosphere.
Polski: Termalne pływy na Marsie Rysunek ten ilustruje marsjańskie "Termalne pływy," zjawisko pogodowe odpowiedzialne za duże wahania ciśnienia dobowego na powierzchni Marsa. Światło słonecze nagrzewa powierzchnię i atmosferę po dziennej stronie planety, powodując wzrost objętości powietrza. Na wyższych poziomach atmosfery, powstają wypukłości powietrza, rozszerzające się na zewnątrz, w celu wyrównania ciśnienia, tak jak na rysunku wskazują czerwone strzałki. Podgrzane powietrze wypływa z wybrzuszenia, obniżając ciśnienie odczuwane na powierzchni poniżej wybrzuszenia. W efekcie powstaje głęboka atmosfera, która jest lżejsza i ma niższe ciśnienie na powierzchni, niż ta po nocnej stronie planety. Ponieważ Mars obraca się względem słońca, to wybrzuszenie porusza się po planecie każdego dnia, od wschodu do zachodu. Stały obserwator, taki jak łazik NASA Curiosity, obserwuje spadek ciśnienia w ciągu dnia, a następnie zwiększenie ciśnienia w nocy. Dokładny czas wzrostu i spadku ciśnienia dotyczy czasu potrzebnego do reakcji atmosfery na światło świetło słoneczne, jak również szereg innych czynników, takich jak kształt powierzchni planety i ilość pyłu w powietrzu. Image credit: NASA/JPL-Caltech/Ashima Research/SWRI |
Date | |
Source | http://www.nasa.gov/mission_pages/msl/multimedia/pia16478.html |
Author | NASA |
Permission (Reusing this file) |
NASA |
Licensing
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This image is in the public domain because it contains materials that originally came from the U.S. National Oceanic and Atmospheric Administration, taken or made as part of an employee's official duties.
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current | 18:13, 8 August 2019 | 1,286 × 994 (507 KB) | BevinKacon (talk | contribs) | actual size from source | |
23:07, 18 November 2012 | 1,024 × 768 (64 KB) | Romkur (talk | contribs) | {{Information |Description=Thermal Tides at Mars This diagram illustrates Mars' "thermal tides," a weather phenomenon responsible for large, daily variations in pressure at the Martian surface. Sunlight heats the surface and atmosphere on the day side ... |
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Width | 1,286 px |
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Height | 994 px |
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Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Adobe Photoshop CS6 (Windows) |
File change date and time | 15:45, 13 November 2012 |
Exif version | 2.21 |
Color space | sRGB |
Date and time of digitizing | 05:02, 9 November 2012 |
Date metadata was last modified | 07:45, 13 November 2012 |
Unique ID of original document | xmp.did:CAA62D00A82AE211A4A7911ED8087B36 |