“Sand dunes can work as natural archives of environment and geological history,”stated Dr. Gunn, an author of a paper released in the journal Nature Communications

“Having a constant, around the world map permits us to much better comprehend how wind-shaped landscapes develop throughout our world today, using a clearer standard when evaluating comparable functions in the rock record or on worlds like Mars.”

In the research study, Dr. Gunn by hand mapped dune existence throughout 0.1-degree grid squares around the world utilizing satellite images and elevation information, determining dunes on approximately 7.8% of Earth’s surface area throughout every continent.

He discovered that dune development can’t be discussed by aridity or wind strength alone.

Rather, dunes are most typical where sand is actively building up instead of deteriorating away.

The scientist showed this plainly in Africa, where parts of the Sahara have a lot of dry surface and strong winds, yet no dunes, due to the fact that sand is being transferred away much faster than it shows up.

He likewise checked out how the shape of crescent-shaped ‘barchan’ dunes– long utilized to presume wind instructions in the world, Mars, and even in the ancient rock record– can be altered by the kind of sediment included.

The brand-new worldwide dataset must assist improve forecasts of desertification under environment modification and enhance analyses of aeolian landscapes on other worlds.

“As international environment patterns shift, this map provides us a standard to track how wind systems and drylands are altering in genuine time,” Dr. Gunn stated.

“Beyond looking backwards at Earth’s history, it provides environment modelers a vital tool to anticipate how desertification and wind-driven disintegration may improve neighborhoods in the years ahead.”

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A. Gunn. 2026. The circulation of Earth’s wind-blown dune. Nat Commun 17, 8468; doi: 10.1038/ s41467-026-75466-y