Ship-borne MAX-DOAS Sailing Measurements of Marine Boundary Layer Trace Gases over the offshore sea area near Huangdao

摘要

Observations of marine boundary layer trace gases vertical column density (VCD) over the offshore sea area near the Yellow Sea were conducted by ship-borne Multi-Axis Differential Optical Absorption Spectroscopy (MAX-DOAS) carried by a Chinese oceanography research vessel, XiangYangHong 08, during an offshore observation campaign, from 13 September 2015 to 18 September 2015. During the offshore observation campaign, the ship-borne MAX-DOAS system made a sailing measurement over the offshore sea areas near the Huangdao district, Qingdao city from 8:00 to 13:00 on 16 September 2015. Observation results of sailing measurement are shown in this paper. By combining geometric character of monitoring area and weather condition, it can be concluded from the sailing measurement results that the geographic conditions have a significant influence on offshore sea boundary layer trace gases content. The sailing measurement showed that the Huangdao offshore sea area boundary layer had much more NO2 and O3 content than other sea areas because the Huangdao offshore sea area is near urban area with surrounding high trace gases content which may be susceptible to human activities, such as traffic influence.