Ozone air quality during the 2008 Beijing Olympics: effectiveness of emission restrictions Export

@article{citeulike:5308494, abstract = {A series of aggressive measures was launched by the Chinese government to reduce pollutant emissions from Beijing and surrounding areas during the Olympic Games. Observations at Miyun, a rural site 100 km downwind of the Beijing urban center, show significant decreases in concentrations of O₃, CO, NO_y, and SO₂ during August 2008, relative to August 2006–2007. The mean daytime mixing ratio of O₃ was lower by about 15 ppbv, reduced to 50 ppbv, in August 2008. The relative reductions in daytime SO₂, CO, and NO_y were 61\%, 25\%, and 21\%, respectively. Changes in SO₂ and in species correlations from 2007 to 2008 indicate that emissions of SO₂, CO, and NO_x were reduced at least by 60\%, 32\%, and 36\%, respectively, during the Olympics. Analysis of meteorological conditions and interpretation of observations using a chemical transport model suggest that although the day-to-day variability in ozone is driven mostly by meteorology, the reduction in emissions of ozone precursors associated with the Olympic Games had a significant contribution to the observed decrease in O₃ during August 2008, accounting for 80\% of the O₃ reduction for the month as a whole and 45\% during the Olympics Period (8–24 August). The model predicts that emission restrictions such as those implemented during the Olympics can affect O₃ far beyond the Beijing urban area, resulting in reductions in boundary layer O₃ of 2–10 ppbv over a large region of the North China Plain and Northeastern China.}, author = {Wang, Y. and Hao, J. and Mcelroy, M. B. and Munger, J. W. and Ma, H. and Chen, D. and Nielsen, C. P.}, citeulike-article-id = {5308494}, citeulike-linkout-0 = {http://www.atmos-chem-phys.net/9/5237/2009/}, day = {29}, journal = {Atmospheric Chemistry and Physics}, keywords = {aerosol, beijing, observations, olympics}, month = {July}, number = {14}, pages = {5237--5251}, posted-at = {2009-07-31 11:22:44}, priority = {0}, publisher = {Copernicus Publications}, title = {{O}zone air quality during the 2008 {B}eijing {O}lympics: effectiveness of emission restrictions}, url = {http://www.atmos-chem-phys.net/9/5237/2009/}, volume = {9}, year = {2009} }

TY - JOUR ID - citeulike:5308494 L3 - citeulike-article-id:5308494 N2 - A series of aggressive measures was launched by the Chinese government to reduce pollutant emissions from Beijing and surrounding areas during the Olympic Games. Observations at Miyun, a rural site 100 km downwind of the Beijing urban center, show significant decreases in concentrations of O₃, CO, NO_y, and SO₂ during August 2008, relative to August 2006–2007. The mean daytime mixing ratio of O₃ was lower by about 15 ppbv, reduced to 50 ppbv, in August 2008. The relative reductions in daytime SO₂, CO, and NO_y were 61%, 25%, and 21%, respectively. Changes in SO₂ and in species correlations from 2007 to 2008 indicate that emissions of SO₂, CO, and NO_x were reduced at least by 60%, 32%, and 36%, respectively, during the Olympics. Analysis of meteorological conditions and interpretation of observations using a chemical transport model suggest that although the day-to-day variability in ozone is driven mostly by meteorology, the reduction in emissions of ozone precursors associated with the Olympic Games had a significant contribution to the observed decrease in O₃ during August 2008, accounting for 80% of the O₃ reduction for the month as a whole and 45% during the Olympics Period (8–24 August). The model predicts that emission restrictions such as those implemented during the Olympics can affect O₃ far beyond the Beijing urban area, resulting in reductions in boundary layer O₃ of 2–10 ppbv over a large region of the North China Plain and Northeastern China. IS - 14 JF - Atmospheric Chemistry and Physics EP - 5251 TI - {O}zone air quality during the 2008 {B}eijing {O}lympics: effectiveness of emission restrictions PB - Copernicus Publications VL - 9 SP - 5237 KW - aerosol KW - beijing KW - observations KW - olympics AU - Wang, Y AU - Hao, J AU - Mcelroy, MB AU - Munger, JW AU - Ma, H AU - Chen, D AU - Nielsen, CP PY - 2009/07/29/ UR - http://www.atmos-chem-phys.net/9/5237/2009/ ER -