HiRISE | Summer is on Its Way (ESP_025916

NASA/JPL/University of Arizona

Summer is on Its Way
ESP_025916_2555 Science Theme: Seasonal Processes

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These dark sand dunes in the North polar region, basking in the sunshine of late spring, have shed most of their seasonal layer of winter ice.

A few bright ice deposits remain sequestered in "cold traps" shadowed from the sun on the poleward-facing side of the dunes. Some bright patches of ice at the foot of the sunlit side of the dunes may be places where ice slumped to the foot of the dune creating a longer-lasting snow bank.

Written by: Candy Hansen (28 March 2012)

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Acquisition date:	05 February 2012	Local Mars time:	2:28 PM
Latitude (centered):	75.517 degrees	Longitude (East):	281.883 degrees
Range to target site:	319.3 km (199.6 miles)	Original image scale range:	31.9 cm/pixel (with 1 x 1 binning) so objects ~96 cm across are resolved
Map projected scale:	25 cm/pixel	Map projection:	POLAR STEREOGRAPHIC
Emission angle:	5.5 degrees	Phase angle:	51.7 degrees
Solar incidence angle:	56 degrees, with the Sun about 34 degrees above the horizon	Solar longitude:	66.7 degrees, Northern Spring
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North azimuth:	100 degrees	Sub-solar azimuth:	320.8 degrees
For map-projected products
North azimuth:	348.1 degrees	Sub solar azimuth:	210.3 degrees

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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

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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.