- Press Release
- Sep 29, 2022
NASA Mars Odyssey THEMIS Image: Clouds and Dust Storms
Context image credit: NASA/Mars Orbiter Laser Altimeter (MOLA) Team
[ Find on map: CGI version ]
This image is part of the following themes:
The atmosphere of Mars is a dynamic system. Water-ice clouds, fog,
and hazes can make imaging the surface from space difficult. Dust
storms can grow from local disturbances to global sizes, through
which imaging is impossible. Seasonal temperature changes are the
usual drivers in cloud and dust storm development and growth.
Eons of atmospheric dust storm activity has left its mark on the
surface of Mars. Dust carried aloft by the wind has settled
out on every available surface; sand dunes have been created and
moved by centuries of wind; and the effect of continual sand-blasting
has modified many regions of Mars, creating yardangs and other
unusual surface forms.
This image was captured 11 days after yesterday’s
image. The clouds that began as transparent water-ice have
now developed into a full blown dust storm. The surface
is completely hidden and the structure of the cloud tops
is all that can be seen. These local North Polar cap-edge
storms will continue throughout the rest of the spring.
[Source: ASU THEMIS Science Team]
Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.
Image Credit: NASA/JPL/Arizona State University
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