This image shows two types of sand dunes on Mars. The small dots are called barchan dunes, and from their shape we can tell that they are upwind. The downwind dunes are long and linear. These two types of dune each show the wind direction in different ways: the barchans have a steep slope and crescent-shaped “horns” that point downwind, while the linear dunes are stretched out along the primary wind direction. Linear dunes, however, typically indicate a wind regime with at least two different prevailing winds, which stretch out the sand along their average direction. In several places in this image, you can find barchan dunes turning into linear dunes as they are stretched out, but they both seem into indicate the same wind direction.
Related posts
-
‘Star Trek: Strange New Worlds’ Season 3 teaser trailer promises more gimmicky hijinks in the final frontier (video)
Technically, this isn’t the first footage shown by Paramount+ for the third season of “Star Trek:... -
NASA Makes Progress on Advanced Drone Safety Management System
4 min read Preparations for Next Moonwalk Simulations Underway (and Underwater) A Massachusetts Institute of Technology... -
Atlas V rocket will launch Amazon’s 1st big batch of Project Kuiper internet satellites on April 9
Amazon’s first big batch of Project Kuiper broadband satellites will lift off just a week from...