Verification of vertically generalized production model and estimation of primary production in Sagami Bay,Japan |
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| Authors: | Joji Ishizaka Eko Siswanto Tetsuya Itoh Hiroshi Murakami Yukuya Yamaguchi Naho Horimoto Takashi Ishimaru Shinji Hashimoto Toshiro Saino |
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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) Seikai National Fisheries Research Institute, Taira, Nagasaki, Nagasaki 851-2213, Japan;(4) Nagasaki Kakuyo High School, Sueishi, Nagasaki, Nagasaki 850-0991, Japan;(5) Earth Observation Research and Application Center, Japan Aerospace Exploration Agency, Sengen, Tsukuba, Ibaraki 305-8505, Japan;(6) Faculty of Marine Science, Tokyo University of Marine Science and Technology, Konan, Minato-ku, Tokyo 108-8477, Japan;(7) Hydrospheric-Atmospheric Research Center, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan |
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| Abstract: | The Vertically Generalized Production Model (VGPM) was verified by the primary production data of the Sagami Bay, Japan. The
VGPM with open ocean parameters including P
B
opt
, maximum primary production per unit of chlorophyll a in the water column, explained only 40% of the variability of integrated primary production. Formulations of the open ocean
P
B
opt
showed no correlation with in situ
P
B
opt
. Adjustment of the parameters of chlorophyll a and temperature dependent P
B
opt
improved the estimation of integrated primary production to 47% of the variation. Vertical integration parameters of VGPM
also have to be adjusted to improve the estimation. Integrated primary production calculated with a stronger light dependency
and with the adjusted P
B
opt
model can explain 74% of the variation. This model was used to estimate primary production of the Sagami Bay during 2003
with satellite data. In situ measurements on cloudy days indicate that the use of satellite data from sunny days only overestimates primary production. |
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| Keywords: | Satellite ocean color GLI MODIS primary productivity coastal water |
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