Even though I haven’t done a #WaveWatchingWednesday in a looong time, there has of course been a lot of wave watching going on. But the longer I wait with copying all the Instagram posts into a blog post, the more work it gets, the longer I put it off. Vicious circle! But here we go today. Plenty of interesting and plenty of beautiful pics! Enjoy!

Starting with some kitchen oceanography (literally, and — for once — involuntary!)

Looks like this freezer compartment in a fridge hasn’t been opened in a while, and more importantly, wasn’t closed properly after the last time! If you look at all the ice you can see that those crystals didn’t form by liquid water freezing, but rather from water vapour from the air. The frost crystals are really pretty, and it’s amazing how much ice could form just by warm-ish air entering and being cooled in there. Would you have expected it? I guess there is always some frost forming in freezers, but I haven’t seen it at such an extent before

Playing with rheoscopic (“current showing”) fluids to visualize how momentum is transferred from a rotating tank to the water inside. Fun! (As also described in this blog post)

Look at how much mud the ducks stirred up when searching for food!

Playing with rheoscopic fluid & Taylor columns…

Curious about my #DayOfScience today? Then check out the highlight!

This #dayofscience is filled with meetings, among others the @iearth.no Geolearningforum. But I managed to squeeze in a quick #wavewatching session to admire the seagull’s wake and that very distinct wave train coming in a little further out!

Oh look, today the Langmuir circulation wind rows are perpendicular to the coast line!

Yay, awesome #wavewatching today!

The things I so to get good wave pics…

Yep. Went down to the water a second time (after the first time was way too short due to work meetings and, more importantly, a drained phone battery ;-))

Really interesting though: you would think that this little pond is sheltered from the wind. Yet there is clearly a wind-driven circulation going on here (in- and outflow are almost dried up; inflow would be from the bottom of the pic, outflow towards the top)

The storm a couple of days ago completely changed the beach profile of my favourite beach! See how the dips in the sand sand show the rip currents (associated with larger waves & higher water levels) going back into the sea?

If my face wasn’t all over the internet anyway, this would be my new profile pic.

My new pet project: looking at the impact craters that dogs shaking off water leave in the sand. So cool!

I love the sea

See the sandbank in the back where waves break & the color of the water changes?

Happy #wavewatching

Cool to see how this sandbank was flooded until very recently, still all the wave ripples in the sand wet & intact!

I love fall at the empty beach!

Look at this great example of waves in shallow water! See how the shape is completely different from how we would draw a wave?

This is a cool example of two wave fields meeting at an angle: one directly wind-driven, one being led around a sand bank. Below this picture there is a zoomed-in markup version, it’s a lot easier to see when you know what to look for :)

Glad I finally got back into my morning fjord dipping routine!
But let’s get to #wavewatching: See the long stripe of calmer water in the lee of that boat house? Pretty cool and only visible because the light was *just right*

Very low water today means beautiful shallow water waves :)

Fall has definitely arrived!

Look at the super awesome pattern in the waves! Shallow water waves become nonlinear and start forming interesting shapes where wave crests just start sticking together instead of each just basically doing their own thing as they would in deep water

Beautiful light this afternoon!

Fall is here!

Waves wrapping around a sand bank. Always fascinating!

More top notch refraction action for @m_paul_coastal — about ab hour between the first two and last two pics, and quite a lot more water! :)

Today’s priorities: Finish run, make sure it’s tracked in the app, run back to take picture :D Hope you appreciate the 500 extra steps and enjoy your weekend! :)

There are worse spots for a morning walk & coffee with a little wave watching for good measure :)

Awesome lunchbreak #wavewatching! See how in the lee of the pontoon the water is smooth and only few waves propagate in from the sides and only a lot further downwind the surface roughness increases and waves start to form, whereas upwind there are a lot of waves?

I love how these waves appear as if out of nowhere and then completely change shape, length, direction, everything; just because of a little sand bank in the water. So fascinating!

Looking into the fairly wave-less water; sand ripples are pretty fascinating: in some places they exist, perpendicular to the direction of wave propagation, and in other places there are rows of debris in direction of wave propagation. What is the difference between those areas?

Yesss! #KitchenOceanography! Today recording with Maxie and Ronja for Treibholz Podcast. You think a podcast might be a weird format to experiment together? Maybe it is, we’ll see. We recorded the video call just in case…
If you are interested in kitchen oceanography, we have good news for you: my 24 days of kitchen oceanography advent calendar will be up again this December, and there will be a Treibholz podcast on treibholz-podcast.de featuring kitchen oceanography every advent Sunday!

Foggy morning. You are looking at Kiel canal here!
And for all my friends who post pics of their bike trips: today I couldn’t resist!

But beautiful weather for a morning coffee at the beach!

We always hear about how water is pulled out into the ocean before a tsunami hits. Here is a miniature version of the same phenomenon. Looks quite cool, doesn’t it?

How many autumn & winter storms does it take to erode the connection between main land and the foundation of this lighthouse? I have no idea but would imagine that there is a lot of maintenance necessary

Beautiful light playing in the waves!


A wake coming in…

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