The characterization of NO2 pollution in Beijing based on satellite and conventional observation data
The characterization of NO2 pollution in Beijing based on satellite and conventional observation data
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发表时间：
2011
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通讯作者：
W. Ying
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作者：
W. Ying
利用卫星监测数据，对北京市1999-2010年NO2质量浓度和2004-2010年垂直气柱密度数据进行了分析（OMI和GOME-2）结果表明，1999 - 2007年北京市NO2质量浓度呈上升趋势，2008年北京奥运会期间采取的空气净化措施降低了NO2质量浓度2010年农展馆和定陵站NO2质量浓度继续上升，古城站NO2质量浓度降至最低，NO2柱具有季节性，北京夏季NO2柱的化学寿命短于冬季，柱数小于冬季;在自然排放占主导地位的瓦里关，NO2柱与北京相反;在龙凤山，NO2柱受人为排放和自然排放的共同影响，NO2日变化也比较明显，GOME 2在北京观测到的NO2浓度在9：30时普遍高于OMI在13：45时的浓度，而在瓦里关观测到的NO2浓度则相反; NO2日变化在龙凤山观测到的NO2浓度具有一定的特征;北京NO2日变化与定陵观测站NO2质量浓度相关性较好。
NO2 mass concentration during 1999—2010 and vertical column density data during 2004—2010 in Beijing were studied using satellite monitoring data(OMI and GOME-2) and conventional observation data.The results showed that there was an increase of NO2 mass concentration in Beijing from 1999 to 2007.Air cleaning measures taken during 2008 Beijing Olympic Games reduced NO2 mass concentration and column density greatly,which again increased in 2009 but with a level lower than before 2008.This is possibly resulted from the source control efforts associated with the Olympics,economic downturn and the adjustment of industrial structure.In 2010,NO2 mass concentration at Nongzhanguan station and Dingling station continued to increase,but at Gucheng station reduced to the minimum,thanks to the off production of smelting and hot-rolled steel in Shijingshan District.NO2 columns were season-dependent.There were shorter chemical lifetimes and smaller NO2 columns in summer than in winter in Beijing.At Waliguan where natural emissions dominated,NO2 columns showed reversed phenomenon compared to Beijing.At Longfengshan both affected by anthropogenic and natural emissions,NO2 columns had two peaks and two troughs.Diurnal variation of NO2 was also obvious.GOME2 generally observed higher NO2 amounts at 9:30 than OMI at 13:45 in Beijing,and there was reverse result at Waliguan.NO2 daily change displayed characteristics at Longfengshan.NO2 columns in Beijing had a good correlation with NO2 mass concentration at Dingling Station.