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dc.contributor.authorDavis, Joel
dc.contributor.authorM. Grindrod, P
dc.contributor.authorBoazman, Sarah
dc.contributor.authorVermeesch, P
dc.contributor.authorBaird, T
dc.identifier.citationDavis, J. M., Grindrod, P. M., Boazman, S. J., Vermeesch, P., & Baird, T. (2020). Quantified Aeolian dune changes on Mars derived from repeat context camera images. Earth and Space Science, 7, e2019EA000874en_US
dc.description.abstractAeolian systems are active across much of the surface of Mars and quantifying the activity of bedforms is important for understanding the modern and recent Martian environment. Recently, the migration rates and sand fluxes of dunes and ripples have been precisely measured using repeat High Resolution Imaging Science Experiment (HiRISE) images. However, the limited areal extent of HiRISE coverage means that only a small area can be targeted for repeat coverage. Context Camera (CTX) images, although lower in spatial resolution, have wider spatial coverage, meaning that dune migration can potentially be monitored over larger areas. We used time series, coregistered CTX images and digital elevation models to measure dune migration rates and sand fluxes at six sites: Nili Patera, Meroe Patera, two sites at Herschel crater, McLaughlin crater, and Hellespontus Montes. We observed dune displacement in the CTX images over long‐term baselines (7.5–11 Earth years; 4–6 Mars years). Bedform activity has previously been measured at all these sites using HiRISE, which we used to validate our results. Our dune migration rates (0.2–1.1 m/EY) and sand fluxes (2.4–11.6 m3 m−1 EY−1) compare well to measurements made with HiRISE. The use of CTX in monitoring dune migration has advantages (wider spatial coverage, faster processing time) and disadvantages (ripples not resolved, digital elevation model dune heights may be underestimates); the future combined use of HiRISE and CTX is likely to be beneficial.en_US
dc.publisherAmerican Geophysical Union (AGU)en_US
dc.titleQuantified Aeolian Dune Changes on Mars Derived From Repeat Context Camera Imagesen_US
dc.typeJournal Articleen_US
dc.identifier.journalEarth and Space Scienceen_US
pubs.organisational-group/Natural History Museum
pubs.organisational-group/Natural History Museum/Science Group
pubs.organisational-group/Natural History Museum/Science Group/Earth Sciences
pubs.organisational-group/Natural History Museum/Science Group/Earth Sciences/Mineral and Planetary Sciences
pubs.organisational-group/Natural History Museum/Science Group/Functional groups
pubs.organisational-group/Natural History Museum/Science Group/Functional groups/Research
dc.embargoNot knownen_US
elements.import.authorDavis, JMen_US
elements.import.authorGrindrod, PMen_US
elements.import.authorBoazman, SJen_US
elements.import.authorVermeesch, Pen_US
elements.import.authorBaird, Ten_US
dc.description.nhm©2019. American Geophysical Union. All Rights Reserved. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.en_US
dc.subject.nhmSand dunesen_US
dc.subject.nhmAeolian systemsen_US

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