with Michael Hasson, Vittorio Colicci, Raisha Abubo, and @marslogander.bsky.social, all at @stanforddoerr.bsky.social

^^ a classic. “Puyallup” as a close second

Instant classic!

I also like to use some of their examples from previous underwater experiments (Reffet et al., 2010; doi.org/10.1130/G308...) to show how acute and obtuse diverging winds result in different dune types (inspired by @agunn.bsky.social 's Sharp Lecture last year):

Their results totally line up with the Rubin and Hunter model too! "As defined, the resulting dune orientation yields to the maximum gross transport normal to the bedform trend, as proposed by Rubin and Hunter"

Their underwater experiments and model comparison with modern aeolian dunes shows that the orientation relative to the RDD is the one that maximizes the growth rate. Also explains how dunes of different morphologies can exist under the same wind regime:

cool stuff! Courrech du Pont et al. (2014) took this a step further by showing that the dune type (elongating vs migrating) is dependent on sediment supply. doi.org/10.1130/G356...

So proud of Michael!! 😎

This work was a collaboration with @alvitello.bsky.social at @unipd.bsky.social and A. Ielpi and @ubcokanagan.bsky.social

Check also:

- Perspective by J. Pizzuto: doi.org/10.1126/scie...

- Stanford’s press release: sustainability.stanford.edu/news/rise-pl...

we ❤️ dunes

PhD student Sophie Silver's first paper shows that crack geometry betrays presence of water on other planets! www.pnas.org/doi/10.1073/...
There's a nice write up in Penn Today here: penntoday.upenn.edu/news/penn-ca...

with @marslogander.bsky.social, Jani Radebaugh, and Wen Bo