overturning – Adventures in Oceanography and Teaching

24 Days of #KitchenOceanography — Oceanic overturning circulation

mglessmer — Wed, 02 Dec 2020 07:00:12 +0000

Welcome to 24 days of #KitchenOceanography! Herzlich Willkommen zu 24 Tagen Küchen-Ozeanographie! Deutsche und Englische Anleitungen weiter unten.

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Thermal forcing vs rotation tank experiments in more detail than you ever wanted to know

mglessmer — Mon, 25 May 2020 12:05:23 +0000

This is the long version of the two full “low latitude, laminar, tropical Hadley circulation” and “baroclinic instability, eddying, extra-tropical circulation” experiments. A much shorter version (that also includes the end cases “no rotation” and “no thermal forcing”) can be found here. Several of my friends were planning on teaching with DIYnamics rotating tables right now. […]

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Thermal forcing vs rotation

mglessmer — Sat, 23 May 2020 12:05:57 +0000

The first experiment we ever ran with our DIYnamics rotating tank was using a cold beer bottle in the center of a rotating tank full or lukewarm water. This experiment is really interesting because, depending on the rotation of the tank, it will display different regimes. For small rotations we get a low latitude, laminar, tropical […]

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Brine rejection and overturning, but not the way you think! Guest post by Robert Dellinger

mglessmer — Thu, 16 Apr 2020 12:05:58 +0000

It’s #KitchenOceanography season! For example in Prof. Tessa M Hill‘s class at UC Davis. Last week, her student Robert Dellinger posted a video of an overturning circulation on Twitter that got me super excited (not only because as of now, April 15th, it has 70 retweets and 309 likes. That’s orders of magnitude more successful than any […]

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Salt fingers in my overturning experiment

mglessmer — Fri, 22 Nov 2019 13:05:43 +0000

You might have noticed them in yesterday’s thermally driven overturning video: salt fingers! In the image below you see them developing in the far left: Little red dye plumes moving down into the clear water. But wait, where is the salt? In this case, the “double” in double diffusion comes from heat and dye which […]

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Thermally driven overturning circulation

mglessmer — Thu, 21 Nov 2019 17:11:01 +0000

Today was the second day of tank experiments in Torge’s and my “dry theory 2 juicy reality” teaching innovation project. While that project is mainly about bringing rotating tanks into the theoretical teaching of ocean and atmosphere dynamics, today we started with the non-rotating case of a thermally driven overturning circulation. Very easy setup: A […]

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Combining a slowly rotating water tank with a temperature gradient: A thermal wind demonstration!

mglessmer — Wed, 14 Aug 2019 17:05:56 +0000

Setting up an overturning circulation in a tank is easy, and also interpreting the observations is fairly straightforward. Just by introducing cooling on one side of a rectangular tank a circulation is induced (at least for a short while until the tank fills up with a cold pool of water; see left plot of the […]

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Experiment: Oceanic overturning circulation (the slightly more complicated version)

mglessmer — Wed, 15 Aug 2018 05:36:11 +0000

The experiment presented on this page is called the “slightly more complicated version” because it builds on the experiment “oceanic overturning circulation (the easiest version)” here. Background One of the first concepts people hear about in the context of ocean and climate is the “great conveyor belt”. The great conveyor belt is a very simplified concept of the […]

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Experiment: Oceanic overturning circulation (the easiest version)

mglessmer — Fri, 10 Aug 2018 05:37:24 +0000

“The easiest” in the title of this page is to show the contrast to a “slightly more complicated” version here. Background One of the first concepts people hear about in the context of ocean and climate is the “great conveyor belt”. The great conveyor belt is a very simplified concept of the global ocean circulation, which is depicted as […]

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Temperature-driven overturning experiment – the easy way

mglessmer — Fri, 06 Nov 2015 09:11:17 +0000

In my last post, I showed you the legendary overturning experiment. And guess what occurred to me? That there is an even easier way to show the same thing. No gel pads! (BUT! And that is a BIG BUT! Melting of ice cubes in lukewarm water is NOT the process that drives the “real” overturning! For […]

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