Martian Air Pressure, How much variance is there? |
Martian Air Pressure, How much variance is there? |
Oct 1 2006, 04:46 PM
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Merciless Robot Group: Admin Posts: 8783 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
Just thinking when looking at the Victoria pics...how much does the average air pressure increase with respect to the surrounding area at the bottom of the crater? Also, where is the lowest point on Mars (which also presumably has the highest air pressure)? I can't remember if it's in Hellas or Coprates Chasma.
Rationale here is that, given MRO's astonishing capabilities, these low areas should be given priority for long-term monitoring; if transient surface water exists anywhere, it's probably way down in a crater or a canyon. -------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Dec 3 2016, 06:22 PM
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Senior Member Group: Members Posts: 1628 Joined: 5-March 05 From: Boulder, CO Member No.: 184 |
In figure 2 we see in these summary statistics that Viking was around a few percent: http://journals.ametsoc.org/doi/pdf/10.1175/JAS3718.1. I would suppose this ratio could be larger at high altitudes where aerobraking is being considered.
On Mars the semidiurnal tide is generally stronger than the diurnal tide, kind of like ocean tides on Earth. I recall this being discussed by Conway Leovy during my internship on the mission. Here is an example for Viking & Pathfinder over a few sols: https://mars.jpl.nasa.gov/MPF/ops/ss007.jpg Further discussion of the semidiurnal tide is in this TPS blog: http://www.planetary.org/blogs/guest-blogs...atmosphere.html -------------------- Steve [ my home page and planetary maps page ]
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