Satellite Detection of Temporal and Spatial Variability of Red Tide and Suspended Sediments in the Ariake Sound

• Project/Area Number: 17510012
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Environmental dynamic analysis
• Research Institution: Nagasaki University
• Principal Investigator: ISHIZAKA Joji Nagasaki University, Faculty of Fisheries, Professor, 水産学部, 教授 (40304969)
• Project Period (FY): 2005 – 2006
• Project Status: Completed (Fiscal Year 2006)
• Budget Amount: ¥3,700,000 (Direct Cost: ¥3,700,000); Fiscal Year 2006: ¥1,000,000 (Direct Cost: ¥1,000,000); Fiscal Year 2005: ¥2,700,000 (Direct Cost: ¥2,700,000)
• Keywords: Ariake Sound / Turbidity / Suspended Sediments / Phytoplankotn / Chlorophyll a / Photosynthesis / Remote Sensing / Red TIde / クロロフィル / 濁り

Research Abstract

In order to understand relationship between red tide and turbidity in the Ariake Sound, SeaWiFS ocean color LAC data of chlorophyll a and nLw555, which indicates suspended sediment, from 1997 to 2004 was used. Number of available data per year can be used to identify the location of qualified data and neglect poor quality data from near coast and contaminated with stray light. Time series data of mean chlorophyll a and nLw555 data in the Ariake Sound and daily precipitation with two-week running mean were compared. Satellite chlorophyll a showed the maximum about 20 days after the precipitation peak. The increasing rate increased 1.45 with 10゜C increase of temperature, and the amount was 4.4 mg/m^3 with 10mm of precipitation. On the other hand, nLw555, indicating suspended sediment, showed the maximum about 10 days after the precipitation peak and before the maximum of chlorophyll a. Chlorophyll a and nLw555 showed generally inverse relationship; however, influence of turbidity to phytoplankton growth should be further verified. Analysis of daily data indicated that turbidity increase and chlorophyll a increase for spring and neap tides, respectively. This is consistent with Tanaka et al. (2005) who found similar relationship around tidal flat in the end of bay.

Research Products

• [Journal Article] Satellite Detection of Red Tide in Ariake Sound, 1998-2001. (2006)
  • Author(s): Ishizaka, J., Y.Kitaura, Y.Touke, H.Sasaki, A.Tanaka, H.Murakami, T.Suzuki, K.Matsuoka, H.Nakata
  • Journal Title: J. Oceanogr. 62 Pages: 37-45
  • NAID: 40007066627
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Seasonal variability of SeaWiFS chlorophyll a in the Maraca Straits in relation to Asain monsoon. (2006)
  • Author(s): Tan, C.K., J.Ishizaka, S.Matsumura, F.M.Yusoff, M.I.H.Ibrahim
  • Journal Title: Cont. Shelf Res. 26 Pages: 168-178
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Alternative measuring method for water-leaving radiance using a radiance sensor with a domed cover. (2006)
  • Author(s): Tanaka, A., H.Sasaki, J.Ishizaka
  • Journal Title: Optics Express 14 (8) Pages: 3099-3105
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Validation of ADEOS-II GLI ocean color products using in-situ observations. (2006)
  • Author(s): Murakami, H., K.Sasaoka, K.Hosoda, H.Fukushima, M.Toratani, R.Fouin, B.G.Mitchell, M.Kahru, P.-Y.Deschamps, D.Clark, S.Flora, M.Kishino, S.-i.Saitoh, I.Asanuma, A.Tanaka, H.Sasaki, K.Yokouchi, Y.Kiyomoto, H.Saito, C.Dupouy, A.Siripong, S.Matsumura, J.Ishizaka
  • Journal Title: J. Oceanogr. 63 Pages: 373-393
  • NAID: 10017497206
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Satellite Detection of Red Tide in Ariake Sound, 1998-2001. (2006)
  • Author(s): Ishizaka, J., Y.Kitaura, Y.Touke, H.Sasaki, A.Tanaka, H.Murakami, T.Suzuki, K.Matsuoka, H.Nakata
  • Journal Title: Journal of Oceanography 62 Pages: 37-45
  • NAID: 40007066627
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Seasonal variability of SeaWiFS chlorophyll a in the Maraca Straits in relation to Asain monsoon. (2006)
  • Author(s): Tan, C.K., J.Ishizaka, S.Matsumura, F.M.Yusoff, M.I.H.Ibrahim
  • Journal Title: Continental Shelf Research 26 Pages: 168-178
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Alternative measuring method for water-leaving radiance using a radiance sensor with a domed cover. (2006)
  • Author(s): Tanaka, A., H.Sasaki, J.Ishizaka
  • Journal Title: Optics Express 14 Pages: 3099-3105
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Validation of ADEOS-II GLI ocean color products using in-situ observations. (2006)
  • Author(s): Murakami, H., K.Sasaoka., K.Hosoda, H.Fukushima, M.Toratani, R.Fouin, B.G.Mitchell, M.Kahru, P.-Y.Deschamps, D.Clark, S.Flora, M.Kishino, S.-i.Saitoh, I.Asanuma, A.Tanaka, H.Sasaki, K.Yokouchi, Y.Kiyomoto, H.Saito, C.Dupouy, A.Siripong, S.Matsumura, J.Ishizaka
  • Journal Title: Journal of Oceanography 63 Pages: 373-393
  • NAID: 10017497206
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Alternative measuring method for water-leaving radiance using a radiance sensor with a domed cover. (2006)
  • Author(s): Tanaka, A.
  • Journal Title: Optics Express 14(8) Pages: 3099-3105
• [Journal Article] Validation of ADEOS-II GLI ocean color products using in-situ observations. (2006)
  • Author(s): Murakami, H.
  • Journal Title: J.Oceanogr. 63 Pages: 373-393