File:Variation of pressure on Mars.png
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[edit]DescriptionVariation of pressure on Mars.png |
English: Pressure Cycles on Mars
This graph shows the atmospheric pressure at the surface of Mars, as measured by the Rover Environmental Monitoring Station on NASA's Curiosity rover. The blue curve shows data from Sol 31 (Sept. 6, 2012) and the green curve shows data from Sol 93 (Nov. 7, 2012). Pressure is a measure of the amount of air in the whole column of atmosphere sitting above the rover. The overall increase in pressure between Sol 31 and Sol 93 is the signature of the entire Martian atmosphere growing in mass as we move into springtime in the southern hemisphere. This happens because the south pole receives more and more sunlight, and carbon dioxide vaporizes off of the winter south polar cap. Each year the atmosphere grows and shrinks by about 30 percent due to this effect. The curves also show a strong daily variation in pressure of around 10 percent, with a peak near 7 a.m. on Mars and a minimum near 4 p.m. This daily cycle in pressure is caused by a "thermal tide," a global-scale pressure wave in Mars' atmosphere driven by sunlight heating the ground and air.Polski: Marsjańskie dobowe cykle zmian ciśnienia atmosferycznego. Wykres ten, pokazuje ciśnienie atmosferyczne na powierzchni Marsa, zmierzone przez Marsjańską Stację Monitoringu Środowiska łazika Curiosity NASA. Niebieska krzywa przedstawia dane z Sol 31 (6 września 2012) i zielona krzywa pokazuje dane z Sol 93 (7 listopada 2012). Ciśnienie jest miarą ilości powietrza w całej kolumnie atmosfery powyżej łazika Curiosity Ogólny wzrost ciśnienia między Sol 31 i Sol 93 jest efektem rosnącej masy całej marsjańskiej atmosfery, w związku ze zbliżanem sie wiosny na półkuli południowej. Dzieje się tak dlatego, ponieważ półkula południowa otrzymuje dużo więcej światła słonecznego, skutkiem czego dwutlenek węgla paruje/sublimuje z zimowej polarnej czapy bieguna południowego. W efekcie każdego roku atmosfera rośnie i kurczy się o około 30 procent w związku z parowaniem i zestalaniem się/resublimowaniem dwutlenku węgla. Krzywe pokazują również silne codzienne wahania ciśnienia o około 10 procent, ze szczytem w pobliżu marsjańskiej siódmej rano i minimum w pobliżu godziny szesnastej. Ten codzienny cykl ciśnienia jest spowodowany przypływem "fali cieplnej," na skalę globalną, powodującym falę zmian ciśnienia w atmosferze Marsa napędzaną słońcem ogrzewającym podłoże i marsjańskie powietrze. Image credit: NASA/JPL-Caltech/CAB(CSIC-INTA)/FMI/Ashima Research |
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Source | http://www.nasa.gov/mission_pages/msl/multimedia/pia16477.html |
Author | NASA |
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This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.) | ||
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current | 16:24, 20 November 2012 | 1,600 × 1,200 (481 KB) | Romkur (talk | contribs) | {{Information |Description ={{en|1=Pressure Cycles on Mars This graph shows the atmospheric pressure at the surface of Mars, as measured by the Rover Environmental Monitoring Station on NASA's Curiosity rover. The blue curve shows data from Sol 31 (... |
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