Satellite detection of red tide in Ariake Sound, 1998–2001 |
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| Authors: | Joji Ishizaka Yasuhisa Kitaura Yasuharu Touke Hiroaki Sasaki Akihiko Tanaka Hiroshi Murakami Toshikazu Suzuki Kazumi Matsuoka Hideaki Nakata |
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| Institution: | (1) Faculty of Fisheries, Nagasaki University, Bunkyo, Nagasaki, Nagasaki 852-8521, Japan;(2) Graduate School of Science and Technology, Nagasaki University, Bunkyo, Nagasaki, Nagasaki 852-8521, Japan;(3) Nagasaki Industrial Promotion Foundation, Ikeda, Omura, Nagasaki 856-0026, Japan;(4) Earth Observation Research and Application Center, Japan Aerospace Exploration Agency, Harumi, Chuo-ku, Tokyo 104-6023, Japan |
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| Abstract: | High resolution SeaWiFS data was used to detect red tide events that occurred in the Ariake Sound, Japan, a small embayment
known as one of the most productive areas in Japan. SeaWiFS chlorophyll data clearly showed that a large red tide event, which
damaged seaweed (Nori) cultures, started early in December 2000 in Isahaya Bay, expanded to the whole sound and persisted
to the end of February 2001. The monthly average of SeaWiFS data from May 1998 to December 2001 indicated that the chlorophyll
peaks appeared twice a year, in early summer and in fall, after the peaks of rain and river discharge. The SeaWiFS data showed
that the red tide event during 2000–2001 winter was part of the fall bloom; however, it started later and continued significantly
longer than other years. Satellite ocean color data is useful to detect the red tide; however the algorithms require improvement
to accurately estimate chlorophyll in highly turbid water and in red tide areas. |
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| Keywords: | Harmful algal bloom (HAB) ocean color chlorophyll estuarine |
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