東京湾における有機炭素の起源および挙動

概要

論文の詳細を見る
The data of organic carbon observed in seawater of northwestern part of Tokyo Bay during 1980-1988 (except 1985) were arranged, and its source and behavior were discussed. It was observed that dissolved organic carbon (DOC) tended to decrease with increase of salinity in Tokyo Bay and riverine DOC was conservative in the Tamagawa Estuary. A linear relationship was observed between DOC and chlorophyll a (Chl. a) concentrations. The source of DOC in Tokyo Bay was estimated by multiple regression analysis between DOC, Chl. a and salinity. At St. 8 locating in estuary of the Arakawa River, the relative abundances of DOC derived from phytoplankton, terrestrial and oceanic waters were estimated to be 15%, 53% and 32%, respectively. On the other hand, at St. 35 near the center of the bay, DOC of respective origin was estimated to be 27%, 16% and 57%. Particulate organic carbon (POC) was positively correlated with Chi. a, but was not correlated with salinity. The source of POC in Tokyo Bay was estimated by the relationship between POC and Chi. a concentrations. The mean proportion of POC derived phytoplankton and non-phytoplankton origin was estimated to be 43% and 57% respectively at St. 8, and 69% and 31% at St. 35. The estimated origin of DOC and POC showed wide spatial and seasonal fluctuations.
日本地球化学会の論文
1990-09-29