Blockfall on the North Polar Layered Deposits
NASA/JPL/University of Arizona

Blockfall on the North Polar Layered Deposits
ESP_036436_2645  Science Theme: Climate Change
French   German   Spanish   Italian   Icelandic   Russian   


HICLIP

1080p (MP4)  
720p (MP4)  
Listen to the text  

WALLPAPER

800  1024  
1152  1280  
1440  1600  
1920  2048  
2560  2880 

HIFLYER

PDF, 11 x 17 in  

HISLIDES

PowerPoint  
Keynote  
PDF  
The North Polar layered deposits (NPLD) are a stack of layers of ice and dust at the North Pole of Mars. The layers are thought to have been deposited over millions of years, as the atmosphere changed in response to the varying tilt of the planet’s axis. Learning to read this record could tell us much about recent conditions on Mars, but we first need to understand the processes that have shaped the NPLD.

Comparing this HiRISE image with an observation from the previous Martian year reveals an example of one of these processes: block falls. The slope is steep and fractured here, and a large chunk of dusty ice has tumbled down the slope and broken apart. Scientists on the HiRISE team are studying this process at many locations in order to measure how quickly the NPLD is changing.

Other changes are visible on the slope as well: sand patches have shifted, and in some places on the slope they have been eroded into grooves or troughs, most likely by the carbon dioxide frost (dry ice) that covers the North Pole in the winter.

Written by: Colin Dundas   (18 June 2014)

This is a stereo pair with ESP_036977_2645.

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
JPEG
Grayscale: map projected  non-map

IRB color: map projected  non-map

Merged IRB: map projected

Merged RGB: map projected

RGB color: non-map projected

JP2 DOWNLOAD
Grayscale: map-projected (692.5 MB)

IRB color: map-projected (464.0 MB)

JP2 EXTRAS
Grayscale: map-projected  (320.5 MB),
non-map  (255.9 MB)

IRB color: map projected  (103.4 MB)
non-map  (285.2 MB)

Merged IRB: map projected  (205.2 MB)

Merged RGB: map-projected  (190.3 MB)

RGB color: non map-projected  (258.4 MB)

ANAGLYPHS
Map-projected reduced-resolution (PNG)
Full resolution JP2 download
View anaglyph details page

ADDITIONAL IMAGE INFORMATION
Grayscale label   Color label
Merged IRB label   Merged RGB label
EDR products

About color products (PDF)
HiView main page

 Observation Toolbox
Acquisition date:05 May 2014 Local Mars time: 2:12 PM
Latitude (centered):84.385° Longitude (East):343.405°
Range to target site:321.7 km (201.1 miles)Original image scale range:32.2 cm/pixel (with 1 x 1 binning) so objects ~97 cm across are resolved
Map projected scale:25 cm/pixelMap projection:Polarstereographic
Emission angle:8.5° Phase angle:58.5°
Solar incidence angle:65°, with the Sun about 25° above the horizon Solar longitude:126.2°, Northern Summer
For non-map projected products:
North azimuth:110° Sub-solar azimuth:323.9°
For map-projected products
North azimuth:286.6°Sub solar azimuth:141.1°

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
Postscript
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.