A carbon budget in Tokyo Bay |
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| Authors: | Tetsuo Yanagi Toshiro Saino Takashi Ishimaru Shin-ichi Uye |
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| Institution: | (1) Department of Civil and Ocean Engineering, Ehime University, 790 Matsuyama, Japan;(2) Ocean Research Institute, University of Tokyo, Minami-dai 1-15-1, Nakano-ku, 130 Tokyo, Japan;(3) Tokyo University of Fisheries, Konan 4-5-7, Minato-ku, 108 Tokyo, Japan;(4) Faculty of Applied Biological Science, Hiroshima University, 724 Higashi-Hiroshima, Japan |
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| Abstract: | Organic carbon flux from eutrophicated Tokyo Bay to the Pacific Ocean is estimated as 260 ton C day–1 based on the horizontal gradient of COD and the dispersion coefficient at the bay mouth. Also, carbon flux from the air or from the open ocean to Tokyo Bay is estimated as 156 ton C day–1. If we suppose that five percent of the coastal seas in the world might be eutrophicated as Tokyo Bay and the organic carbon flux from the shelf to the open ocean in other coastal seas might be one third of that in Tokyo Bay, 1.12 G tons year–1 would be transported from the eutrophicated coastal seas to the open ocean and such carbon flux may account for the  missing sink in the global carbon budget. |
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