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Proceedings Paper

Optical characteristics of seawater in the North Pacific Ocean
Author(s): Motoaki Kishino; J. Ishizaka; Hiroo Satoh; K. Kusaka; Sei-ichi Saitoh; Takako Miyoi; K. Kawasaki
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Paper Abstract

The downward spectral irradiance and upward spectral radiance, and chlorophyll a concentration of surface water were determined in the North Pacific Ocean: Bering Sea, Gulf of Alaska, Central and Equatorial Pacific, Kuroshio region, Yellow Sea, Japan Sea, Tokyo Bay, and Ise Bay. These areas included Case I and Case II water. The optical characteristics in the study area were based on measurements of underwater spectral irradiance. The strong correlation between the attenuation coefficient at 490 nm, K490, and other at wavelengths were observed. The relation between chlorophyll concentration and K490 showed a good correlation at eh coastal and bay areas except a the stations near river mouths. These relations suggested that suspended and dissolved matter were largely of biogenous origin such as fragmented and decomposed phytoplankton. In the clear ocean, at low chlorophyll concentrations, the data points were widely scattered, implying that K490 is sensitive to changes in suspended particles.

Paper Details

Date Published: 6 February 1997
PDF: 6 pages
Proc. SPIE 2963, Ocean Optics XIII, (6 February 1997); doi: 10.1117/12.266438
Show Author Affiliations
Motoaki Kishino, Institute of Physical and Chemical Research (Japan)
J. Ishizaka, National Institute for Resources and Environment (Japan)
Hiroo Satoh, Tokyo University of Fisheries (Japan)
K. Kusaka, Tokyo University of Fisheries (Japan)
Sei-ichi Saitoh, Hokkaido University (Japan)
Takako Miyoi, Hokkaido University (Japan)
K. Kawasaki, National Research Institute of Fisheries Science (Japan)

Published in SPIE Proceedings Vol. 2963:
Ocean Optics XIII
Steven G. Ackleson; Robert J. Frouin, Editor(s)

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