关键词: 对流层臭氧, 平流层与对流层交换, 地表排放, 北京地区

Abstract:

Based on the ozone sounding data from the south suburb of Beijing radiosonde station, multiple reanalysis data and the simulation of CAM-chem model, the change trend of ozone and its influencing factors in troposphere over Beijing were investigated during 2003-2013. The results indicated that the ozone in troposphere over Beijing increased significantly during 2003-2013, and the total ozone in whole troposphere increased approximately 0.98 DU per year. The contribution of surface emission such as CO, NOX to the increase of ozone in troposphere over Beijing was larger than the dynamic transmission. The increases of ozone in troposphere were approximately 0.13×10-3 to 0.17×10-3 Tg per year due to the downward transport from stratosphere, and the increase was about 0.06×10-3 Tg per year due to the horizontal transport, which accounted for about 20% and 10% of the total increment of ozone in troposphere over Beijing, respectively. However, the increase of ozone caused by the surface emissions contributed about 60% to the total increment in troposphere over Beijing.

Key words: ozone in troposphere, exchange between the stratosphere and the troposphere, surface emission, Beijing