|Photographic nephelometers for the deep sea|
Thorndike, E.M.; Ewing, M. (1967). Photographic nephelometers for the deep sea, in: Hersey, J.B. (Ed.) Deep-sea photography. pp. 113-116
In: Hersey, J.B. (Ed.) (1967). Deep-sea photography. The John Hopkins Oceanographic Studies, 3. The John Hopkins Press: Baltimore. 310 pp., more
In: The John Hopkins Oceanographic Studies, more
|Authors|| || Top |
- Thorndike, E.M.
- Ewing, M.
Photographic nephelometers have been designed and constructed for in situ measurements of light scattering in the deep sea. The method consists of a comparison of the amount of light which reaches a camera directly, after passing through an attenuator, with that reaching it indirectly by scattering in the sea water. The light is produced by either an electronic flashtube or a steady source, and the record consists of a series of photographs, or a continuous strip, showing the relative intensities of scattered light and direct, attenuated light. This gives a measure of the light scattering and thus an indication of the amount of suspended matter in the sea.