Titan's equatorial dunes seem to move in the opposite direction to the prevailing easterly winds. Infrequent methane storms at Titan's low latitudes may briefly couple surface winds to fast westerlies above, dominating the net movement of sand.
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Newman, C. Stormy origins of Titan's dunes. Nature Geosci 8, 334–335 (2015). https://doi.org/10.1038/ngeo2423
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DOI: https://doi.org/10.1038/ngeo2423
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