摘要
利用2003—2013年北京地区臭氧探空资料和多种再分析资料,结合CAM-chem模式模拟分析了北京地区对流层臭氧的长期变化趋势及影响因子。结果表明:近11 a来,北京地区对流层臭氧整体呈明显增加趋势,对流层臭氧总量每年增加约0.98 DU,且地表排放对该地区对流层臭氧增加的贡献相比动力过程更大。其中,由平流层向下输送造成的对流层臭氧总量每年增加约为0.13×10^(-3)~0.17×10^(-3)Tg,对北京地区对流层臭氧总量的增加贡献约20%;由水平输送造成的臭氧增加每年约为0.06×10^(-3)Tg,对臭氧总量增加贡献约10%;而由地表排放造成的对流层臭氧增加约占该地区对流层臭氧总增加量的60%。
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,NO X 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.
作者
李洋
张健恺
田文寿
谢飞
索春男
LI Yang;ZHANG Jiankai;TIAN Wenshou;XIE Fei;SUO Chunnan(College of Atmospheric Sciences,Lanzhou University,Key Laboratory for Semi-Arid Climate Change of the Ministry of Education,Lanzhou 730000,China)
出处
《干旱气象》
2018年第2期157-166,共10页
Journal of Arid Meteorology
基金
国家自然科学基金“北半球平流层极涡位置的变化及其对东亚地区天气气候的影响”(41705022)和“东亚地区平流层化学-辐射-动力反馈及其对东亚地区天气气候的影响”(41575038)共同资助
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
ozone in troposphere
exchange between the stratosphere and the troposphere
surface emission
Beijing