File:PIA16912-MarsCuriosityRover-SeasonalPressure-GaleCrater.jpg
PIA16912-MarsCuriosityRover-SeasonalPressure-GaleCrater.jpg (664 × 531 像素,檔案大小:57 KB,MIME 類型:image/jpeg)
說明
摘要
[編輯]描述PIA16912-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. |
日期 |
在2012年8月到2013年2月之間 date QS:P,+2012-00-00T00:00:00Z/8,P1319,+2012-08-00T00:00:00Z/10,P1326,+2013-02-00T00:00:00Z/10 |
來源 | http://photojournal.jpl.nasa.gov/catalog/PIA16912 |
作者 | NASA/JPL-Caltech/CAB(CSIC-INTA)/FMI/Ashima Research |
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[編輯]Public domainPublic domainfalsefalse |
本作品由NASA創作,屬於公有領域。根據NASA的版權政策:“NASA的創作除非另有聲明否則不受版權保護。”(參見:Template:PD-USGov/zh,NASA版權政策或JPL圖像使用政策) | ||
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