Coastal oceans play a disproportionally important role in oceanic carbon cycles,and have become a hotspot for present global carbon researches. In comparison withcontinental shelves, the offshore areas are affected more severely by humandisturbances and biological processes here are suffering more from human inputs.Within this condition, natural sink and/or source of CO2in the offshore areas aretotally changed or intensified. Studies on pCO2and air-sea CO2flux in the offshoreareas, which are affected seriou...