Hexbyte Glen Cove Widespread megaripple activity found on Martian north pole area

Hexbyte Glen Cove

Polar bedform sites with active megaripples, as viewed in HiRISE. Approximate transport direction is toward the lower left and the inset is 100 meters wide. Credit: HiRISE data: NASA/JPL/University of Arizona

Part of the uncertainty when studying planetary polar landforms is the long, cold polar winter that eventually covers the region in carbon dioxide and water ice. For wind-driven bedforms, such as megaripples, that means they are unable to migrate for nearly half of the year. “However, it appears the late spring and summer winds that descend off the polar cap more than make up for these other periods of inactivity,” Chojnacki said.






“Megaripples were found to be widespread across the region and migrating at relatively high rates relative to other sites on Mars that are at lower latitudes. This enhanced activity is likely related to the greater sand fluxes found for neighboring dunes which are driven by summer-time seasonal winds when polar ice is sublimating. This supports the idea that much of the Martian surface is actively being modified and not just ancient or static.” Chojnacki said. “In contrast, other megaripples appear to be stabilized, a likely result of inter-granular ice within low wind areas.”



More information:
Matthew Chojnacki et al, Widespread Megaripple Activity Across the North Polar Ergs of Mars, Journal of Geophysical Research: Planets (2021). DOI: 10.1029/2021JE006970

Citation:
Widespread megaripple activity found on Martian north pole area (2022, January 12)
retrieved 13 January 2022
from https://phys.org/news/2022-01-widespread-megaripple-martian-north-pole.html

% %item_read_more_button%% Hexbyte Glen Cove Educational Blog Repost With Backlinks — #metaverse #vr #ar #wordpress

Posted in Uncategorized and tagged , .