期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 502, 期 -, 页码 641-649出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2014.09.075
关键词
Tropospheric ozone; Transition zone; Asia-Pacific monsoon
资金
- National Natural Science Foundation of China [40875078]
- European Union [606719]
- Natural Science Foundation of the Higher Education Institutions of Jiangsu Province, China [12KJA170003]
- project of Jiangsu provincial 333 and Six Talent Peaks
- Program for Postgraduates Research Innovation of Jiangsu Higher Education Institutions [CXZZ13_0509]
The seasonal and inter-annual variations of ozone (O-3) in the atmospheric boundary layer of the Asia-Pacific Ocean were investigated using model simulations (2001-2007) from the Model of Ozone and Related chemical Tracers, version 4 (MOZART-4). The simulated O-3 and diagnostic precipitation are in good agreement with the observations. Model results suggest that the Asia-Pacific monsoon significantly influences the seasonal and inter-annual variations of ozone. The differences of anthropogenic emissions and zonal winds in meridional directions cause a pollutants' transition zone at approximately 20 degrees-30 degrees N. The onset of summer monsoons with a northward migration of the rain belt leads the transition zone to drift north, eventually causing a summer minimum of ozone to the north of 30 degrees N. In years with an early onset of summer monsoons, strong inflows of clean oceanic air lead to low ozone at polluted oceanic sites near the continent while strong outflows from the continent exist, resulting in high levels of O-3 over remote portions of the Asia-Pacific Ocean. The reverse is true in years when the summer monsoon onset is late. (C) 2014 Elsevier B.V. All rights reserved.
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