Interpreting Dune Patterns: Insights from Earth and Mars - by et_exists
Examples of active dune fields within Nili Patera on Mars. Dunes like these were examined for this study in hopes of giving scientists better insights into how their interactions are influenced by a planet’s climate.
Example of dune activity in Kaiser Crater on Mars, one of the locations for this recent study investigating dune interactions. “As both sand and winds get funneled into the valley, the dunes feel a change in their boundary conditions, and their pattern needs to adjust,” said Colin Marvin, who is a PhD student in the Department of Earth and Planetary Sciences at Stanford, and lead author of the study. “They move into the portion outside the valley, and they again readjust to their unconfined conditions, and we see a drop in the number of interactions. This trend is exactly what we expected to see.
For Mars, the researchers used orbital imagery to discover similar dune patterns, specifically near the Martian north pole where the researchers observed minor amounts of dune interactions. This was due to the dunes reaching a state of equilibrium with their surrounding environment, resulting in relative spacing from each other and similar characteristics for both appearance and size.
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