Busy week for @stanforddoerr.bsky.social EPSP at #AGU25! Started with PhD student Vittorio Colicci looking for clues about #Archean environments through the deposits of some of Earth’s oldest #coastal #dune fields in South Africa (12/16 am, EP21E-1659)

Excited to share our latest publication in @natcomms.nature.com, where we analyze the aerodynamic roughness length over equilibrated rippled sand beds with active saltation under atmospheric pressures intermediate between those of Earth and Mars. www.nature.com/articles/s41...

Postdoc Carlos Alvarez shows that Mars’s large #aeolian #ripples are not impact ripples through low-pressure #wind tunnel experiments at #NASA Ames. Very excited about this one! @stanforddoerr.bsky.social www.nature.com/articles/s41...