26 October 1994 Analysis of Sea Tech absorption meter characteristics and comparisons to Kd measurements
Author Affiliations +
Proceedings Volume 2258, Ocean Optics XII; (1994) https://doi.org/10.1117/12.190092
Event: Ocean Optics XII, 1994, Bergen, Norway
A Sea Tech single wavelength (488 nm) absorption meter (known as the `a-meter') has been deployed in the Florida Straits and in the open ocean near Kauai, Hawaii. The instrument has been evaluated to assess its performance in measuring the diffuse attenuation coefficient (Kd) so that the numerous problems associated with traditional Kd measurements can be avoided. (Traditionally, one measures downwelling irradiance, which requires daylight and suffers from the effects of clouds, ship shadowing, instrument tilting, surface wave focussing, and Raman transpectral scattering.) The main result of this evaluation is that the a-meter generally provided profiles that agreed with traditional Kd profiles to within about 0.003/m, and the instrument did not suffer from any of the problems of irradiance measurements. It did, however, require the use of knowledgeable deployment, maintenance, and calibration techniques and the use of essential supporting measurements in order to obtain this degree of accuracy. This paper describes these aspects of how to effectively use the a- meter and provides representative examples of simultaneous traditional Kd profiles.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jeffrey H. Smart, Jeffrey H. Smart, } "Analysis of Sea Tech absorption meter characteristics and comparisons to Kd measurements", Proc. SPIE 2258, Ocean Optics XII, (26 October 1994); doi: 10.1117/12.190092; https://doi.org/10.1117/12.190092


Studies of optical ringing in seawater
Proceedings of SPIE (October 25 1994)
Ocean Optics: Introduction And Overview
Proceedings of SPIE (August 06 1986)
Three-parameter optical studies in Scottish coastal waters
Proceedings of SPIE (February 05 1997)
Oceanic in-situ Fraunhofer-line characterizations
Proceedings of SPIE (December 30 1992)
Beam Attenuation And Absorption Meters
Proceedings of SPIE (September 26 1984)

Back to Top