Follow this link to skip to the main content NASA Jet Propulsion Laboratory California Institute of Technology JPL HOME EARTH SOLAR SYSTEM STARS & GALAXIES SCIENCE & TECHNOLOGY BRING THE UNIVERSE TO YOU JPL Email News RSS Podcast Video
JPL Banner
2001 Mars Odyssey
Home Participate
MULTIMEDIA

Images


read the article 'Erisa Hines'
03.30.2016 Erisa Hines
read the article 'Buzz Aldrin'
03.30.2016 Buzz Aldrin
read the article 'Women in Science'
02.12.2016 Women in Science
read the article 'Ravi Vallis'
08.03.2012 Ravi Vallis
read the article 'Dao Valles'
08.03.2012 Dao Valles
read the article 'Lismore Crater'
07.17.2012 Lismore Crater
read the article 'Bunge Crater Dunes'
04.01.2012 Bunge Crater Dunes
read the article 'Shalbatana Vallis'
04.01.2012 Shalbatana Vallis
read the article 'Meridiani Planum'
04.01.2012 Meridiani Planum
read the article 'Canyon Junction'
04.01.2012 Canyon Junction
read the article 'Terra Sirenum'
04.01.2012 Terra Sirenum
read the article 'Echus Chasma'
01.23.2012 Echus Chasma
read the article 'Elysium Mons'
01.10.2012 Elysium Mons
read the article 'Tyrrhena Fossae'
12.26.2011 Tyrrhena Fossae
read the article 'Tempe Terra'
08.27.2010 Tempe Terra
read the article 'Aonia Terra Dunes'
10.26.2009 Aonia Terra Dunes
read the article 'Dark Spots'
07.22.2009 Dark Spots
read the article 'Dark Spots and Fans'
07.22.2009 Dark Spots and Fans
read the article 'Mars Canyon View'
07.22.2009 Mars Canyon View
read the article 'Landslide Run-Out'
07.22.2009 Landslide Run-Out
read the article 'Terra Sirenum'
07.22.2009 Terra Sirenum
This image combines a photograph of seasonal dark flows on a Martian slope with a grid of colors based on data collected by a mineral-mapping spectrometer observing the same area.
02.10.2014

Color-Coded Clues to Composition Superimposed on Martian Seasonal-Flow Image

This image combines a photograph of seasonal dark flows on a Martian slope with a grid of colors based on data collected by a mineral-mapping spectrometer observing the same area. The area is at Palikir Crater in the southern hemisphere of Mars.

The photograph is from the High Resolution Imaging Science Experiment (HiRISE) camera. The composition information, as an image with pixels appearing as a grid of squares, is from the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM). Both of these instruments are on NASA's Mar Reconnaissance Orbiter. The view is oriented with north toward the bottom. The scale bar at lower left indicates 90 meters (295 feet).

These dark, warm-season flows are called "recurring slope lineae" or RSL. Researchers are using observations from Mars orbiters to study the possibility that RSL result from action of salty liquid water. This image was included in a paper by Lujendra Ojha of Georgia Institute of Technology, Atlanta, and co-authors in Geophysical Research Letters.

The purple and pink colors of the CRISM image represent spectra with absorption of light at wavelengths of 920 nanometers and 530 nanometers. The strength of these absorption bands at this site varies seasonally -- weaker when the RSL are inactive and stronger when the RSL are active. Absorption at 530 nanometers can indicate a concentration of ferric iron, so this could be a clue that the fluctuations observed in the absorption bands of iron minerals may be related to the RSL activity. Other image products from the same Nov. 2, 2007, HiRISE observation are available at http://www.uahirise.org/PSP_005943_1380 .

The Johns Hopkins University Applied Physics Laboratory, Laurel, Md., operates CRISM in coordination with an international team of researchers from universities, government and the private sector. The University of Arizona Lunar and Planetary Laboratory, Tucson, operates HiRISE, which was built by Ball Aerospace & Technologies Corp., Boulder, Colo. NASA's Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the Mars Reconnaissance Orbiter for NASA's Science Mission Directorate, Washington.

Image Credit: NASA/JPL-Caltech/UA/JHU-APL


All Images
USA.gov
PRIVACY     FAQ     SITEMAP     FEEDBACK     IMAGE POLICY