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Proceedings Paper

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
Author(s): Yukinori Kumagai; Motoaki Kishino; Masayuki Mac Takahashi
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Paper 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.

Paper Details

Date Published: 5 January 2001
PDF: 8 pages
Proc. SPIE 4154, Hyperspectral Remote Sensing of the Ocean, (5 January 2001); doi: 10.1117/12.411679
Show Author Affiliations
Yukinori Kumagai, Univ. of Tokyo (Japan)
Motoaki Kishino, RIKEN---Institute of Physical and Chemical Research (Japan)
Masayuki Mac Takahashi, Univ. of Tokyo (Japan)

Published in SPIE Proceedings Vol. 4154:
Hyperspectral Remote Sensing of the Ocean
Robert J. Frouin; Hiroshi Kawamura; Motoaki Kishino, Editor(s)

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