人工海底マウンド整備から見た北海道苫小牧沖の海洋構造について

Abstract

In this paper, marine structure off Tomakomai Hokkaido is reported. This area is planed for developing artificial marine ridge. Analyzing the marine structure gives necessary information to examine the possibility of this project. Main results are as follows, 1) Bottom water mass flows faintly but no stasis is seen. 2) Bottom water mass contains comparatively high nutrients to upper water mass. 3) Stratification is seen in autumn, when upper water lacks nutrients and primary production comes down in this area. 4) Period of low primary production period and of thin nutrients are almost correspondent. 5) This observation suggests the possibility of primary production improvement by upwelling current with artificial marine ridge.