Evaluation of possible enhancement of primary productivity due to mixing of upwelled subsurface water by a man-made sea-mount using ocean color remote-sensing

Yukinori Kumagai; Motoaki Kishino; Masayuki Mac Takahashi

doi:10.1117/12.411679

5 January 2001 Evaluation of possible enhancement of primary productivity due to mixing of upwelled subsurface water by a man-made sea-mount using ocean color remote-sensing

Yukinori Kumagai, Motoaki Kishino, Masayuki Mac Takahashi

Author Affiliations +

Proceedings Volume 4154, Hyperspectral Remote Sensing of the Ocean; (2001) https://doi.org/10.1117/12.411679
Event: Second International Asia-Pacific Symposium on Remote Sensing of the Atmosphere, Environment, and Space, 2000, Sendai, Japan

Abstract

Possible enhancement of nutrient availability in the euphotic zone was challenged by lifting up subsurface nutrient-rich water in a coastal area. Man-made sea-mount was designed to enhance the rate of upwelling on continental shelf area. Since 1995, a project has been carried out for six years to build up a sea-mount and to research its possible effect on the primary productivity on the continental shelf at a depth of 80 m off Nagasaki Prefecture of Kyushu Island. A dual cone of around 120 m in width and around 11 m in height is being constructed in this area. During the research period, the availability of clear data sets of ocean color satellite images as about 7% of all scenes taken in this study area by the OCTS and SeaWiFS sensors. Patchy areas of higher chlorophyll-a concentrations than the surrounding water were occasionally observed in the square area of about 10 km * 10 km where the sea-mount was under construction at the center, particularly after the completion about 2/3 of the final stage for the sea-mount, while the chlorophyll pigments distributed almost homogeneously before the construction. The geophysical locations occurring the high chlorophyll a patches corresponded with the area predicted by a mathematical simulation model.

Citation Download Citation

Yukinori Kumagai, Motoaki Kishino, and Masayuki Mac Takahashi "Evaluation of possible enhancement of primary productivity due to mixing of upwelled subsurface water by a man-made sea-mount using ocean color remote-sensing", Proc. SPIE 4154, Hyperspectral Remote Sensing of the Ocean, (5 January 2001); https://doi.org/10.1117/12.411679

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KEYWORDS

Optical coherence tomography

Sensors

Satellites

Remote sensing

Image resolution

Clouds

Data conversion

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