File:PIA16912-MarsCuriosityRover-SeasonalPressure-GaleCrater.jpg
PIA16912-MarsCuriosityRover-SeasonalPressure-GaleCrater.jpg (664 × 531 pixels, file size: 57 KB, MIME type: image/jpeg)
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editDescriptionPIA16912-MarsCuriosityRover-SeasonalPressure-GaleCrater.jpg |
English: Seasonal Pressure Curve Peaks at Gale Crater This graph shows about one-fourth of a Martian year's pattern atmospheric pressure at the surface of Mars, as measured by the Rover Environmental Monitoring Station on NASA's Curiosity rover. The rover landed at about the time of the annual minimum in atmospheric pressure and documented a seasonal climb to a pressure peak. The maximum and minimum pressures for each Martian day, or sol, from mid-August 2012 to late February 2013 are plotted. Pressure is designated in pascals. For comparison, 1,000 pascals is about one percent of sea-level atmospheric pressure on Earth. The start of the curve is late winter in Mars' southern hemisphere. The end of the curve is at the end of southern spring. The overall increase is the signature of the entire Martian atmosphere growing in mass through the southern-hemisphere spring. 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 pressure then begins to decline as carbon dioxide freezes out of the atmosphere in the north, forming the winter north polar cap. |
Date |
between August 2012 and February 2013 date QS:P,+2012-00-00T00:00:00Z/8,P1319,+2012-08-00T00:00:00Z/10,P1326,+2013-02-00T00:00:00Z/10 |
Source | http://photojournal.jpl.nasa.gov/catalog/PIA16912 |
Author | NASA/JPL-Caltech/CAB(CSIC-INTA)/FMI/Ashima Research |
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This image or video was catalogued by Jet Propulsion Laboratory of the United States National Aeronautics and Space Administration (NASA) under Photo ID: PIA16912. This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing. Other languages:
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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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