Martian dust devils: Directions of movement inferred from their tracks

TitleMartian dust devils: Directions of movement inferred from their tracks
Publication TypeJournal Article
Year of Publication2004
AuthorsGreeley R, Whelley PL, Neakrase LDV
JournalGeophysical Research Letters
Volume31
Date PublishedDec
ISBN Number0094-8276
Accession NumberWOS:000226026400007
Abstract

Active dust devils ( atmospheric vortices with entrained dust) seen on Mars leave surface tracks inferred to result from the injection of loose particles into the atmosphere, typically exposing a darker (or, in some cases brighter) substrate. Hundreds of similar appearing surface tracks are common in many areas, but in the absence of imaging the active dust devils responsible for their formation, it has not been possible to determine the direction of forward motion of the vortex. Laboratory experiments simulating dust devils show that overlapping scallops in some tracks enable the direction of forward motion to be determined.