Andrew Gunn

these are a good start for each idea:

1) fig 3 doi.org/10.1038/s415...

2) fig 1 doi.org/10.1130/G457...

hydrocarbon or ice or mix; it’s not totally clear - will wait for dragonfly

great chat & i can chime in here as a dune enthusiast: 1) sand of titan’s dunes are (likely) water ice grains so cold they behave like earth’s rocks and 2) mars dunes migrate similar speeds to earth since faster winds and reduced gravity compensate for lower air density

The Death of Meanjin Price of everything, value of nothing dept.

The Death of Meanjin. a couple of thoughts. open.substack.com/pub/greenwor...

Shallow water flooding into Kati Thanda-Lake Eyre responding to an easterly wind change.

zebra migration across the field site (-20.6, 25.0)

Omg what a gem this is... Stained glass stratigraphy is a thing of beauty 👌🪨🔍

Our Spring schedule is up!

13.3 Paul Bierman
20.3 James Gearon
3.4 Victor Sacek
10.4 Julia Cisneros
17.4 Yaquan Chang
24.4 Sinéad Lyster
08.5 Jaap Nienhuis
15.5 Audrey Margirier
22.5 Jingtao Lai
29.5 Abdallah Zaki
05.6 Dan Parsons
12.6 Joel Wilner
19.6 Andrew Gunn
26.6 Zhiwei Xu
03.7 Vanessa Gabel

inside a dune!

AINSE PGRA scholarship applications are now open. I was lucky enough to get a PGRA during my PhD (and, later, an ECRG during my last postdoc), and the support was invaluable. Highly recommend applying!

https://www.ainse.edu.au/postgraduate/

#AcademicChatter #AusAcademia

i'm hiring an assistant lecturer (3 years - mostly research, some teaching) to join the monash geomorph lab - please see the job posting and my listserv emails for more info and/or get in touch! please share widely! careers.pageuppeople.com/513/cw/en/jo...

Kebonye Dintwe will give the ISAR virtuaeolian seminar on fire’s role in sub-Saharan savanna December 10th 5pm Central African Time - please sign up and see our other talks here www.aeolianresearch.com/seminar/

Come do a PhD with Channing Prend and myself! The project will use seal data and models to understand Antarctic Slope Current dynamics.

Based in Edinburgh, UK, but with opportunities for time in Australia also.

e4-dtp.ed.ac.uk/e5-dtp/super... 🌊

If you are into granular material, piles and how granular jets fall and impact on a surface, @ramsudhirsharma.bsky.social got you covered on Sunday morning!

Second paper from our lab! Led by Mobin Alipour, we show phoretic migration due to solute gradients drastically changes the transport of colloids in porous media, even suppressing the influence of geometric disorder! arxiv.org/abs/2411.14712

Dream team!!

I didn't see this already, so I went through my follow list and made a Starter Pack for Women+ in geo & EO - very broadly.

I'm reminded how lopsided the gender divide is still in our field when I get 1 woman follower for every 10 men. It's particularly noticeable right now.

go.bsky.app/Ay1iTTe

So here I am next to a *half scale* model of our current design and holding an actual scale rotor that was used in wind tunnel testing. I’m wearing an awesome light purple blazer, a green flower print shirt, brown slacks and a purple KN95 because COVID isn’t over. Behind the dragonfly model is an artists conception of the view from the surface of titan

It’s really hard to get a sense of scale for Dragonfly and folks are really used to toy drones so a lot of people assume it is much smaller than it is. So here I am next to a *half scale* model of our current design and holding an actual scale rotor that was used in wind tunnel testing 🧪🔭

A video intro of myself. 🌏🦘🌊🏄🏽💃🤖🐎📷

I work at UniMelb and I study and teach about physics of the ocean and climate. I'm also passionate about climate model development, scientific computing, and open source practices.

(made w Miriam Pickard)

Shaded relief map of global tropopause heights for 20 Nov 2024.

Global tropopause heights from this morning - spot the bomb cyclone (look for the curly elf hat). 🧪

A meander bend cutoff and the associated point bars, with patterns that try to imitate the formation of ice-wedge polygons on growing point bars

Screenshot of the day #meandering

Free dunes. A: Barchanoid ridges in Occidental Sahara (27.166°N, 13.29°E), date: 11/2018. B: Straight-crested asymmetric dunes in the Mu-Us desert in China (38.756°N, 107.936°E), date: 3/2011. C: Zibars (low reliefdunes between linear dunes) in the Kumtagh desert in China (40.33°N, 92.655°E), date: 3/2021. D: Linear dunesin the Rub’ al Khali desert (18.39°N, 48.058°E), date: 12/2016. E: Network dunes in Libya (25.136°N, 13.082°E),date: 9/2016. F: Dome dune in Oman (18.522°N, 53.549°E), date: 11/2014. G,H: Star dunes in Algeria (31.427°N,7.302°E), date: 8/2012 (H). Credits: Maxar Technologies (A, B, E, F, H), CNES/Airbus (C), Landsat Copernicus(D), P. Claudin (G).

we have a new pre-print out reviewing wind-blown dunes. we explain why dunes look the way they do, and classify them. lots of thought, debate, and time went into this one - hopefully you find it useful! eartharxiv.org/repository/v...

map of barchan dune orientations around Mars' north pole

we have a new paper out led by @liorr.bsky.social on inferring martian surface wind and sediment pathways from barchan dunes. hundreds of thousands of dunes identified, then used to learn about near-surface climate - it's sooooo cool. check it out here: doi.org/10.1029/2022...

i think so, after gridding. depends for what... dune migration i've done (but can use dz/dt and exner for flux). could you just swap the x,y,z columns of your data to z,x,y then do "vertical difference"? COSI-corr is a common method for horizontal displacement, can work on DEMs. for bank erosion?

hi everyone!! posts here about geomorphology and climate. check out colin marvin's new paper on dune interactions: doi.org/10.1130/G512...