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 […]
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 […]
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 […]
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 […]
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 […]
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 […]
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 […]
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 […]
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. […]
