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Summary
| Description |
Français : Petit sous-marin (jouet) testé dans un cours d'eau riche en phytoplancton et donc saturé en oxygène durant la journée.
1) Des bulles se forment spontanément (nucléation) sur la coque. La partie supérieure en a été débarrassée quand l'engin est remonté plusieurs fois en surface, mais les bulles persistent dans la partie inférieure de la coque. Si de telles bulles se forment sur une caméra ou système photo embarqué, elles dégradent la qualité des images. 2) Les deux imagettes sur la gauche montrent le sous-marin rapidement piégé dans un tapis de petites (courtes) algues filamenteuses quand il s'est posé sur le fond. (Des algues plus fines que des cheveux, ancrées sur le substrat se sont prises dans les deux hélices arrières).English: Small submarine (toy) being tested in a water rich in phytoplankton and thus saturated with oxygen during the day. Bubbles are spontaneously formed (nucleation) on the hull. The upper part has been cleaned when the machine was emerging several times at the surface, but the bubbles persist in the lower part of the hull. If such bubbles are on a camera system or embedded image system, they degrade the image quality.
2) The two thumbnails (on the left) show the machine quickly trapped in a "carpet" of small (short) filamentous algae when the submarine was placed on the bottom. (< = tangled propellers). |
| Date | |
| Source | Own work |
| Author | Lamiot |
| Camera location |   | View this and other nearby images on: OpenStreetMap |  |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 12:08, 28 July 2015 | | 1,496 × 1,104 (353 KB) | Lamiot | User created page with UploadWizard |
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