Diffuse Winter Lighting of the Chasma Boreale Scarp
NASA/JPL/University of Arizona
Diffuse Winter Lighting of the Chasma Boreale Scarp
ESP_032559_2645  Science Theme: Climate Change
Icelandic  Italian  Spanish 


720p (MP4)  
Listen to the text  


800  1024  
1152  1280  
1440  1600  
1920  2048  
2560  2880  


PDF, 11 x 17 in  


Sunlight was just starting to reach the high Northern latitudes in late winter when HiRISE captured this image of part of the steep scarps around portions of the North Polar layered deposits.

The sunlight is highly diffused by atmospheric scattering, with the sun less than 0.5 degrees above the horizon. This diffuse light gives the image a unique appearance, almost like a painting. The surface is entirely covered by carbon dioxide frost mixed with dust.

Written by: Alfred McEwen (audio by Tre Gibbs)   (8 August 2013)

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
B&W: map projected  non-map

IRB color: map projected  non-map

Merged IRB: map projected

Merged RGB: map projected

RGB color: non-map projected

B&W: map-projected (214MB)

IRB color: map-projected (123MB)
B&W: map-projected  (83MB),
non-map  (90MB)

IRB color: map projected  (32MB)
non-map  (77MB)

Merged IRB: map projected  (207MB)

Merged RGB: map-projected  (190MB)

RGB color: non map-projected  (71MB)
B&W label
Color label
Merged IRB label
Merged RGB label
EDR products

About color products (PDF)
HiView main page

 Observation Toolbox
Acquisition date:07 July 2013 Local Mars time:12:24
Latitude (centered):84.266° Longitude (East):342.494°
Range to target site:318.6 km (199.1 miles)Original image scale range:63.7 cm/pixel (with 2 x 2 binning) so objects ~191 cm across are resolved
Map projected scale:50 cm/pixelMap projection:Polarstereographic
Emission angle:0.1° Phase angle:89.6°
Solar incidence angle:89°, with the Sun about 1° above the horizon Solar longitude:347.8°, Northern Winter

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: http://www.nasa.gov. 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.