Looks like the MRO is tossing bones. Last release show a departing storm and snowscape
in Chasma Boreale. This image was taken on the 6th of July. A companion MARCI image from April 20th will also be presented. This would be 6 Earth weeks between, we most convert to Mars time and this would in reality represent 3 Mars weeks. On Earth the seasons last about 3 mo’s, on Mars about 6. Latitude of MRO image 84.7N
It would seem that Geologist see geological things and Meteorologist see metrological things.
MRO team says:
“HiRISE data allow us to see which side of these dunes has the steeper slope (the slip-face), telling us what direction the dune—and strong near surface winds—are moving (in this case the slip-faces point almost directly to the left).”
Then they wonder:
“Yet something else is also happening to these particular dunes. Dark streaks lead away from the dunes toward the lower left of the image.”
That would show wind shift with frontal passage.
The US Navy never lets a ship leave port without a weather crew on board. I suggest NASA should do the same. What has always amazed me is the reluctance of the Weather teams to simply say what they see and know to be true. Go figure.
So, what do I see? I see a departing storm to the north . Clouds and Snowfall with visibility reduced to total obscuration. Snowfall accumulations in troughs between dunes are greater north. Ground snow shows a steady storm track movement to the North, some areas appear to have missed out. This would be reasonable for spring and early summer. Southern sections shows residual winter snow in a sublimation stage
In my opinion the geological observations are incomplete without the meteorological data taken in context with the visible data. Bless their heart. The visible data at the Phoenix site supports air-mass development and movement, so does everything else. Without Phoenix showing frost development under varying conditions this thread would not be possible. That is why I put it here.
Image 1- Departing Polar Storm
Image 2- Satellite data showing active storm track.