World Library  
Flag as Inappropriate
Email this Article

Dust devil tracks

Article Id: WHEBN0022260607
Reproduction Date:

Title: Dust devil tracks  
Author: World Heritage Encyclopedia
Language: English
Subject: Noachis quadrangle, Arcadia quadrangle, Climate of Mars, Frento Vallis, Icaria Fossae
Collection:
Publisher: World Heritage Encyclopedia
Publication
Date:
 

Dust devil tracks

Martian Dust Devil - in Amazonis Planitia (April 10, 2001) (also) (video (02:19)).

Many areas on Mars experience the passage of giant dust devils. A thin coating of fine bright dust covers most of the Martian surface. When a dust devil goes by it blows away the coating and exposes the underlying dark surface, which within a few weeks assumes its former bright colour, either from being re-covered through wind action or some form of oxidation through exposure to sunlight and air. Dust devils occur when the sun warms up the air near a flat, dry surface. The warm air then rises quickly through the cooler air and begins spinning while moving ahead. This spinning, moving cell may pick up dust and sand and leave behind a clean surface.[1]

These dust devils have been seen from the ground and high overhead from orbit. They have even blown dust off the solar panels of the two Rovers on Mars, thereby greatly extending their usefulness.[2] The pattern of the tracks has been shown to change every few months.[3] A study that combined data from the High Resolution Stereo Camera (HRSC) and the Mars Orbiter Camera (MOC) found that some large dust devils on Mars have a diameter of 700 metres (2,300 ft) and last at least 26 minutes.[4]

Images

References

  1. ^ HiRISE | (PSP_00481_2410). Hirise.lpl.arizona.edu. Retrieved on 7 August 2011.
  2. ^ Mars Exploration Rover Mission: Press Release Images: Spirit. Marsrovers.jpl.nasa.gov. Retrieved on 7 August 2011.
  3. ^ [1]
  4. ^ Reiss, D. et al. 2011. Multitemporal observations of identical active dust devils on Mars with High Resolution Stereo Camera (HRSC) and Mars Orbiter Camera (MOC). Icarus. 215:358-369.
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 



Copyright © World Library Foundation. All rights reserved. eBooks from Hawaii eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.