Abstract
Muroto deep seawater is rich in nutrients, clean, and low in temperature. Deep seawater is used as a raw material in industry. A periodic observation of deep seawater was executed and the stabilities of each element were studied. As a result, almost all major elements were found to be stable at the coefficient of a variance of 2% or less. On the other hand, those of the nutrients were high compared to major elements. And the correlation for each nutrient was found. This infers that Muroto deep seawater is deeper than actual deep seawater compared by means of vertical profiles of nutrients in the North Pacific.
