internal waves – Adventures in Oceanography and Teaching

24 Days of #KitchenOceanography — Topographic mixing

mglessmer — Mon, 14 Dec 2020 07:00:52 +0000

Welcome to 24 days of #KitchenOceanography! Both English and German instructions below. Herzlich Willkommen zu 24 Tagen Küchen-Ozeanographie! Deutsche und Englische Anleitungen weiter unten.

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24 Days of #KitchenOceanography — Surface waves and internal waves

mglessmer — Sun, 06 Dec 2020 07:00:11 +0000

Welcome to 24 days of #KitchenOceanography! Both English and German instructions below. Herzlich Willkommen zu 24 Tagen Küchen-Ozeanographie! Deutsche und Englische Anleitungen weiter unten. …Oooops. Changed the picture, didn’t change the text. Left & right is the wrong way round… Thanks for catching this, Uta! …Oooops. Das Bild geändert aber nicht den Text: Links und rechts […]

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Lee waves with an asymmetrical “mountain”

mglessmer — Thu, 25 Oct 2018 09:20:38 +0000

How will lee waves look differently if we are using the asymmetrical mountain instead of the symmetric one? And is symmetry actually important at all or are we just looking at different slopes downstream while the upstream slope doesn’t have an influence on the wave field? After admitting I had only ever used the symmetrical […]

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Instructions: Dead water demonstration in the GFI basement

mglessmer — Thu, 25 Oct 2018 05:26:27 +0000

This blog post is meant as guidelines if someone other than me might have to set up this demonstration at some point… Have fun! :-) Setting up the stratification If I am working fast and nothing goes wrong, this takes almost 2.5 hours. Make sure you have enough time to set this up! Filling the […]

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Instructions: Lee wave demonstration in the GFI basement

mglessmer — Wed, 24 Oct 2018 08:20:48 +0000

This blog post is meant as guideline if someone other than me might have to set up this demonstration at some point… Have fun! :-) Lee waves Lee waves are the kind of waves that can be observed downwind of a mountain in the clouds, or downstream of an obstacle in a current as a […]

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Demonstration: Nansen’s “dead water” in a tank!

mglessmer — Mon, 22 Oct 2018 06:00:35 +0000

A ship that is continuously pulled with a constant force suddenly slows down, stops, and then continues sailing as if nothing ever happened? What’s going on there? We will investigate this in a tank! And in order to see what is going on, we have dyed some of the water pink. Can you spot what […]

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Please discuss: Experimental setup for Nansen’s “dead water”

mglessmer — Tue, 09 Oct 2018 19:10:54 +0000

During my last visit to Bergen in August, we set up a nice “dead water” experiment. However, there are nice experiments, and then there are awesome experiments, and since Elin wants to use this experiment in her teaching of the ocean and atmosphere dynamics class, we are going for the latter! So I’ve done some […]

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Tides themselves don’t induce (a lot of) mixing, only tides hitting topography do. An experiment.

mglessmer — Fri, 17 Aug 2018 07:33:50 +0000

As you might have noticed, the last couple of days I have been super excited to play with the large tanks at GFI in Bergen. But then there are also simple kitchen oceanography experiments that need doing that you can bring into your class with you, like for example one showing that tides and internal waves […]

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The one where it would help to understand the theory better (but still: awesome tank experiment!)

mglessmer — Thu, 16 Aug 2018 15:47:11 +0000

The main reason why we went to all the trouble of setting up a quasi-continuous stratification to pull our mountain through instead of sticking to the 2 layer system we used before was that we were expecting to see a tilt of the axis of the propagating phase. We did some calculations of the Brunt-Väisälä […]

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Dead water — the fancy experiment including Nansen himself

mglessmer — Thu, 16 Aug 2018 15:47:05 +0000

Now that we do have a really awesome 12-layer 6-color stratification, we obviously had to do the dead water experiment again. This time we chose to include a not-too-happy-looking Nansen on the ship, too! I love this even more than the one we did yesterday!

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