Looks Like Fog.....In the Distance

[rdunk]

I have looked at many Mars photos, but don't see many with a visible feature of what looks like fog. So, here is one for example from Rover Curiosity sol day 1221.

http://mars.jpl.nasa.gov/msl-raw-images/proj/msl/redops/ods/surface/sol/01221/opgs/edr/ncam/NRB_505890214EDR_D0520948TRAV00409M_.JPG

(click on pic to expand)

[ArMaP]

The problem is that it's to know if what we are looking at is fog or dust, as we are only seeing something getting between the camera and the far away crater rim.

I think only different wavelengths (and that's why they use them) could tell us if it's one or the other.

[Dyna]

This is also one of the techniques used for blurring out the artificial structures on or near the horizon!

[funbox]

The problem is that it's to know if what we are looking at is fog or dust, as we are only seeing something getting between the camera and the far away crater rim.

I think only different wavelengths (and that's why they use them) could tell us if it's one or the other.

I think the sun is a good indicator in this picture , just like it was in all the others

more atmosphere to scatter through = that massive Bloom we see regularly

funbox

[ArMaP]

I think the sun is a good indicator in this picture , just like it was in all the others

more atmosphere to scatter through = that massive Bloom we see regularly

How does that help understand if this is for or dust?

[funbox]

How does that help understand if this is for or dust?

the time it appears ArMaP, I doubt ive seen many sunrises where it hasn't appeared, does dust usually have properties that are explicit to morning time >?

I say there's more evidence of it being water, just via the time it appears
funbox

[zorgon]

Fog on Mars


Courtesy © 1998 by Calvin J. Hamilton
Image taken by the Viking spacecraft. Fog often appears in low-lying areas. It typically occurs in the southern hemisphere especially in the Argyre and Hellas basins. It forms frequently in craters. Occasionally, it occurs in higher regions such as Sinus Sabaeus and Solis Planum. (Click image for larger view)

Chasma Australe Fog
MGS MOC Release No. MOC2-528, 29 October 2003


Courtesy NASA/JPL/Malin Space Science Systems
Fog is a common occurrence in some areas of the retreating south polar seasonal frost cap. Fogs are commonly banked-up against steep slopes or found inside defrosting craters. This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image captured mid-afternoon fog banked against the layered walls of Chasma Australe, a trough in the south polar region of Mars. The frost-covered layers of Chasma Australe can be seen on the right side of this image, the billowy fog is to the left. Sunlight illuminates this scene from the upper left. The fog, probably composed of water ice crystals, casts shadows on the chasm wall. This picture is located near 83.5°S, 257.9°W, and covers an area 3 km (1.9 mi) wide.

Image Source: Malin Space Systems 2003/10/29 M09 04025

Dust Plume


Courtesy © 1998 by Calvin J. Hamilton
Image taken by the Viking spacecraft. This is an example of a dust plume in the Solis Planum region. This image was taken during the springtime for this region. Plumes are found primarily in the southern hemisphere, in highlands such as Syrtis Major and in elevated regions such as Tharsis. (Click image for larger view)

Martian Weather by Bluebird

http://www.thelivingmoon.com/43ancients/02files/Mars_Blue_Bird_Weather.html

[zorgon]

Dust storm on Mars compared to one on Earth

[zorgon]

More Clouds on Mars
Lee Wave Cloud


Courtesy © 1998 by Calvin J. Hamilton
Image taken by the Viking spacecraft. This is a good example of a lee wave associated with an impact crater. Note the wave periodicity in the clouds.

Lee Wave Cloud
Crater with Wavy Fog
MGS MOC Release No. MOC2-424, 17 July 2003


Courtesy NASA/JPL/Malin Space Science Systems
Craters near the edge of the retreating south polar seasonal frost cap often have fog in them, this time of year. This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) wide angle red image was acquired just a few days ago on July 13, 2003. It shows a crater, 36 km (22 mi) across, that is enveloped in fog. This picture was taken as a context frame for a high resolution view that was intended to show dunes on the floor of the crater. That high resolution view was frustrated by thick fog that hid the dunes from view. This wide angle context frame shows that winds from the lower right (southeast) were blowing over the crater, causing the fog to bunch up in a wavy, rippled pattern. Winds streaming off the polar cap toward the north create a variety of patterns in the fogs formed by water ice or vapor as the seasonal cap retreats during southern spring. This picture is located at 66.4°S, 208.6°W, sunlight illuminates the scene from the upper left (northwest).

Image Source: Malin Space Systems 2003/07/17 R07-00964

Wave Clouds


Courtesy © 1998 by Calvin J. Hamilton
Image taken by the Viking spacecraft. Wave clouds usually occur at the lee of a large obstacle. They are often found at the edge of the polar cap, and in the Tharsis and Lunae Planum regions of Mars.

[zorgon]

The problem is that it's to know if what we are looking at is fog or dust, as we are only seeing something getting between the camera and the far away crater rim.

Well you can always give it to us in REAL COLOR

Like this one


ArMaP's Collection
(Edited by Pegasus)
Green Fog

GREEN FOG



http://www.thelivingmoon.com/43ancients/02files/Mars_Images_58_Green_Fog.html

NASA's version


Image credit: NASA/JPL/Cornell
The Image above is clipped from the original full size (60 MB) image with no adjustment in size color or contrast. Just over the hill you can see a greenish fog on the valley floor. This image according to NASA is in true color. The source files are linked above in the article. The fog was first spotted by Exhuberant1's brother and brought to Pegasus. He also sent a copy to Mike Singh for his opinion. [see below]




Mike Singh's Collection
(Edited by Pegasus)
Green Fog

[zorgon]

Dust Devils on Mars




A Dust Devil on Mars
Credit: Malin Space Science Systems, MGS, JPL, NASA (Click image for larger view)

Explanation: Does the surface of Mars change? When inspecting yearly images of the Martian surface taken by the robot spacecraft Mars Global Surveyor currently orbiting Mars, sometimes new dark trails are visible. Although originally a mystery, the culprit is now usually known to be a dust devil, a huge swirling gas-cloud with similarities to a terrestrial tornado. Pictured above, a recent image has not only captured a new dark trail but the actual dust devil itself climbing a crater wall. Dust devils are created when Martian air is heated by a warm surface and begins to spin as it rises. Dust devils can stretch 8 kilometers high but usually last only a few minutes.

Sourse: NASA Astronomy Picture of the Day

Martian Dust Devils in Action
Spirit Rover


Spirit Sol 587


Spirit Sol 632


Spirit Sol 640


Spirit Sol 640

[ArMaP]

the time it appears ArMaP, I doubt ive seen many sunrises where it hasn't appeared, does dust usually have properties that are explicit to morning time >?

The time? What time was it on that location when the photo was taken?

I say there's more evidence of it being water, just via the time it appears

Dust can appear in the air regardless of the time of day.

[Dyna]

I assume the red thing is a mistake in color?



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image hosting 30 mb[/img]

[ArMaP]

Well you can always give it to us in REAL COLOR

Like this one


ArMaP's Collection
(Edited by Pegasus)
Green Fog

GREEN FOG



http://www.thelivingmoon.com/43ancients/02files/Mars_Images_58_Green_Fog.html

I have posted my opinion about that "green fog" several times, but here's once more, to avoid misunderstandings: when a dust devil (or something else) appears only on the image from the (in this case) green channel it will look green.

[zorgon]

I have posted my opinion about that "green fog" several times, but here's once more, to avoid misunderstandings: when a dust devil (or something else) appears only on the image from the (in this case) green channel it will look green.

Okay so  the 'fog' is there but only recorded on the 'green' channel   so the fog looks green because only green light reflects

The point is the 'fog' is there to be recorded on that green channel  so we can see it as green fog

Dust however being mostly iron oxide red dust on mars SHOULD appear brownish red not GREEN