dye tracer – Adventures in Oceanography and Teaching

Broken water pipes

mglessmer — Tue, 05 May 2020 12:05:47 +0000

So yesterday this happened: When I was on my way to meet my friend for a run early in the morning, the whole pavement was flooded (look at the cute little hydraulic jumps!). After calling the authorities (and judging from the telephone operator’s voice, I wasn’t the first one! But then how should I know […]

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Did you know that uranine starts fluorescing again when the ice cubes melt?

mglessmer — Fri, 12 Oct 2018 07:10:32 +0000

Yes, I had to test that! :-D Why do I find this exciting? Because that means that a phase change of the water switches fluorescence as a tracer of that water on and off. Or the other way round: Seeing water fluoresce (or not) tells you what state the water is in without having to […]

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Did you know uranine doesn’t fluoresce when frozen?

mglessmer — Thu, 11 Oct 2018 07:04:58 +0000

Something else I found out when checking on my ice cubes yesterday: I had frozen a second tray* with ice cubes dyed with uranine (you know, the green stuff I found in the lake near my house the other day?). Like the other ones, they clearly froze back-of-the-freezer-forward, and the most interesting thing to me: Only […]

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Balances of dyed and un-dyed waters

mglessmer — Sun, 23 Sep 2018 16:02:56 +0000

Oh look, a plume of (almost) un-dyed water hitting the green lake! I am really fascinated by the balance between green water leaking out of the pipeline and into the rain drainage, the rain falling on the lake, and the rain water coming into the lake through the rain drainage system. Right now, the water […]

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The first autumn storm and its impact on dye tracer and water level

mglessmer — Sat, 22 Sep 2018 05:39:43 +0000

Last night it rained a lot. So the first thing to do this morning was to check what that had done to my green lake! The dye is now a lot more diluted, but overall it still looks surprisingly green seeing that there is a lot of rain water draining into the lake. To give […]

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It’s all about the right equipment: That’s why I now own a UV lamp! I see a lot of fluorescent tracer spotting in my future!

mglessmer — Thu, 20 Sep 2018 15:32:09 +0000

Before I start gushing about my awesome new UV lamp (thanks for encouraging that purchase, Uta! :-)), some other updates on the state of green in the park across the road from my house (don’t know what I am talking about? Check out previous posts on the fluorescent dye tracer). The lake is still bright […]

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Fluorescent night walk — following the stream through the lake into Kiel fjord!

mglessmer — Mon, 17 Sep 2018 20:39:15 +0000

Luckily some of my friends are crazy enough to bring the UV lamps and go on a night walk with me, following the green fluorescent stream! (Don’t know what I am talking about? Check out the previous posts (post 1, post 2) on why there is fluorescent dye in a lake across my street and […]

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Dye tracer “in the wild”, day 2

mglessmer — Mon, 17 Sep 2018 15:36:49 +0000

This morning, the green lake looked different yet again. If you remember yesterday’s pictures, we ended the evening with the lake being a fairly well mixed green color (picture on the right). Now imagine my surprise when I came back in the morning and it looked like this: The right side of the lake is […]

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Dye tracers “in the wild”

mglessmer — Sun, 16 Sep 2018 05:21:43 +0000

You know I love dye tracers (remember the beautiful fluorescent green we used in the 2017 experiments in Grenoble, when we got to play with the 13m diameter rotating tank?) but today I found some “in the wild” again — on the way back from my morning run & swim no less, in Kiel’s Forstbaumschule. […]

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