Topography influences megadune distribution and morphology.

Proc Natl Acad Sci U S A · 2026 · PMC12974449 · PMID 41774805

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a clear trendno p-value reported

Combining data from all dunefields, we observe a clear trend: Megadune height increases significantly near mountains, with two concentrated distribution zones around <100 km (~48%) and 150 to 250 km (~29%) from mountains ( SI Appendix , Fig.

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an increasing trendno p-value reported

This reveals an increasing trend with increasing mean height, suggesting that taller megadunes tend to cluster together.

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