Northern Dunes Covered by Seasonal Dry Ice
NASA/JPL/University of Arizona

Northern Dunes Covered by Seasonal Dry Ice
ESP_016190_2635  Science Theme: Seasonal Processes
French   Spanish   Portuguese   Italian   


800  1024  
1152  1280  
1440  1600  
1920  2048  


PDF, 11 x 17 in  
Dark sand dunes at high Northern latitudes on Mars are covered seasonally by a layer of condensed carbon dioxide (dry ice), visible in this image.

When the sun rises in the spring the ice begins to sublimate. Gas flow from the bottom of the ice layer propels sand from the dunes out through cracks to the top of the ice and down the dune slipface forming the dark streaks seen in this image.

Written by: Candy Hansen   (3 February 2011)

Click to share this post on Twitter Click to share this post on Facebook Click to share this post on Google+ Click to share this post on Tumblr

 Image Products: All image links are drag & drop for HiView, or click to download
Grayscale: map projected  non-map

IRB color: map projected  non-map

Merged IRB: map projected

Merged RGB: map projected

RGB color: non-map projected

Grayscale: map-projected (765.3 MB)

IRB color: map-projected (325.0 MB)

Grayscale: map-projected  (415.7 MB),
non-map  (320.3 MB)

IRB color: map projected  (123.4 MB)
non-map  (260.4 MB)

Merged IRB: map projected  (189.9 MB)

Merged RGB: map-projected  (175.7 MB)

RGB color: non map-projected  (230.4 MB)

Grayscale label   Color label
Merged IRB label   Merged RGB label
EDR products

About color products (PDF)
HiView main page

 Observation Toolbox
Acquisition date:09 January 2010 Local Mars time: 1:13 PM
Latitude (centered):83.514° Longitude (East):118.561°
Range to target site:319.7 km (199.8 miles)Original image scale range:32.0 cm/pixel (with 1 x 1 binning) so objects ~96 cm across are resolved
Map projected scale:25 cm/pixelMap projection:Polarstereographic
Emission angle:0.1° Phase angle:69.7°
Solar incidence angle:70°, with the Sun about 20° above the horizon Solar longitude:35.3°, Northern Spring
For non-map projected products:
North azimuth:115° Sub-solar azimuth:312.1°
For map-projected products
North azimuth:151.4°Sub solar azimuth:350.5°

Context map

Usage Policy
All of the images produced by HiRISE and accessible on this site are within the public domain: there are no restrictions on their usage by anyone in the public, including news or science organizations. We do ask for a credit line where possible: Image: NASA/JPL/University of Arizona
For information about NASA and agency programs on the Web, visit: NASA's Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, Calif., manages the Mars Reconnaissance Orbiter for NASA's Science Mission Directorate, Washington. Lockheed Martin Space Systems is the prime contractor for the project and built the spacecraft. The HiRISE camera was built by Ball Aerospace and Technology Corporation and is operated by the University of Arizona. The image data were processed using the U.S. Geological Survey’s ISIS3 software.