Measurements of Atmospheric Concentration of NO_x and SO₂ in the Sea Areas of Osaka Bay and Seto-inlands Sea

Abstract

Measurements of atmospheric concentration of NO_x and SO₂ were carried out by using the chemiluminescence method of NO_x and the ultraviolet-fluorescence method of SO₂, and by using the training ship Fukae-maru of Kobe Universtiy of Mercantile Marine in the Sea Areas of Osaka Bay and Seto-inlands Sea.
Measurements results make clear the followings. (1) The exhausts from ships have obvious impacts on NO_x and SO₂ concentration in the narrow water areas and/or in the ports where marine traffic is congested. (2) The atmosphere of the north-west area of Osaka Bay is highly polluted in some weather conditions such that the wind due to scale pressure systems is weak and the land-and-sea breeze is prevailing.