Nitrogen and Phosphorus Budgets in the South-western Part of Tokyo Bay
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Accession number;03A0400069
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| Title;Nitrogen and Phosphorus Budgets in the South-western Part of Tokyo Bay |
| Author;
MURAI Y
(Tokyo Univ. Fisheries, Tokyo, Jpn)
NEMOTO M
(Tokyo Univ. Fisheries, Tokyo, Jpn)
NAGASHIMA H
(Tokyo Univ. Fisheries, Tokyo, Jpn)
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Journal Title;J Tokyo Univ Fish
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Journal Code:G0466A
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ISSN:0040-9014
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VOL.89;NO.;PAGE.15-24(2003)
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| Figure&Table&Reference;FIG.15, TBL.1, REF.12 |
| Pub. Country;Japan |
| Language;English |
| Abstract;Material transport of nitrogen and phosphorus in the south-western part of Tokyo Bay was investigated with a two layer box model using monthly data from April 1995 to December 1997. Firstly, the model domains were determined with the aid of the principal component analysis of salt, and the volume flux through the boundaries of each domain was estimated. Next, the nitrogen and phosphorus fluxes were calculated by using transport coefficients obtained from the box model. We concluded that: 1) all year round, the horizontal transport in the upper layer is towards the open ocean through the centre of Tokyo Bay; 2) the vertical transport between the upper and lower layers is upwards in general; 3) the correlation between the production (or consumption) of nitrogen and phosphorus is very high in the upper layers of the domains that have a large freshwater; and 4) for the ratios of nitrogen and phosphorus to the total load of Tokyo Bay, much more nitrogen than phosphorus flows out from the coastal domains to the centre of Tokyo Bay, and then it flows out into the open ocean. (author abst.) |
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