Abstract
We demonstrated applicability of a sensor, which can directly measure hydrogen sulfide (H2S) concentration on-site, to monitoring for marine environment, and characteristics of vertical distribution of H2S from the data obtained using the sensor. Observations were carried out in Tokyo bay in 2010. The data measured by the sensor correlated with the analyzed data of sampled water, but the former were less than half the latter. Therefore, we think that we should use the sensor for quality examinations at the present time. Regarding to the vertical distribution of H2S, the followings were shown. H2S also existed in the bottom layer at the head of the bay. The layer was 2 m high and the concentration of H2S was about one-tenth of the concentration in the deeply excavated site. And high concentration of H2S existed in the bottom layer at Shibaura canal, which was only four meter deep.
