Analysis of Air Quality in Eastern China and its Interaction with Other Regions of the World
Analysis of Air Quality in Eastern China and its Interaction with Other Regions of the World
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DOI：
10.1007/s10874-006-9022-1
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发表时间：
2006-10
影响因子：
2
通讯作者：
Chunsheng Zhao;X. Tie;Geli Wang;Yu Qin;Peicai Wang
中科院分区：
文献类型：
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作者：
Chunsheng Zhao;X. Tie;Geli Wang;Yu Qin;Peicai Wang
利用GOME和MOPITT卫星资料和全球大气化学输送模式MOZART-2对中国东部地区大气化学/气溶胶组成进行了研究。然后，我们估计了中国本地排放对世界其他地区化学品收支的影响。同样，我们还调查了来自其他地区的空气污染对中国东部化学收支的影响。研究表明，中国东部地区大气柱中CO和NOx浓度也较高。高浓度的CO和NOx在中国东部地区夏季产生中等水平的O3浓度（约40至50 ppbv）和非常低的O3在冬季（约10至20 ppbv）。计算的NO2柱与GOME测量值相当一致。根据MOPITT测量，计算的CO柱被低估。CO预测值被低估的原因之一是，在计算CO排放量时没有考虑1990 - 2000年排放量的快速增长。地表O3的计算值与实测值基本一致，季节变化较强。然而，测量是非常有限的，并且需要在中国东部进行更多的测量。NO2柱在中国东部有很强的季节变化，冬季浓度最高，夏季浓度最低。这种季节性变化的原因主要是由于氮氧化物化学损失的季节性变化，夏季非常高，冬季非常低。研究了中国本地大气排放和来自其他地区的远距离输送对中国东部大气化学分布的影响。结果表明，中国东部地区的NOx浓度主要是由中国本地的排放造成的，尤其是在冬季。中国东部地区的CO浓度主要来源于本地的排放（30%~ 40%）和来自其他地区的输送。同样，中国的CO排放对世界其他地区也有重要影响，但对北方的影响有限。中国的本地排放对地表O3浓度也有重要影响。在冬季，当地的排放减少了30%至50%的表面O3浓度。在夏季，本地排放产生约50 - 70%的O3浓度在中国东部地区。
In this study, we used satellite data (GOME and MOPITT) together with a global chemical-transport-model of atmosphere (MOZART-2) to characterize the chemical/aerosol composition over eastern China. We then estimated the effects of local emissions in China on the chemical budgets in other regions of the world. Likewise, we also investigated the effects of air pollution from other regions on the chemical budget over eastern China. The study shows that the column CO and NOxconcentrations are also high in eastern China. The high CO and NOxconcentrations produce modest levels of O3concentrations during summer (about 40 to 50 ppbv) and very low O3during winter (about 10 to 20 ppbv) in eastern China. The calculated NO2column is fairly consistent from the GOME measurement. The calculated CO column is underestimated from the MOPITT measurement. One of the reasons of the underestimation of the predicted CO is due to a fact that the CO emissions were taken without considering the rapid increase of emissions from 1990 to 2000. The calculated surface O3is consistent with the measured values, with strong seasonal variations. However, the measurement is very limited, and more measurements in eastern China will be needed. The column NO2has a very strong seasonal variation in eastern China, with the highest concentrations during winter and the lowest concentrations during summer. The cause of this seasonal variability is mainly due to the seasonal changes in the chemical loss of NOx, which is very high in summer and very low during winter. The effects of the local emissions in China and long-range transport from other regions on the chemical distributions in eastern China are studied. The results show that NOxconcentrations in eastern China are mostly caused by the local emissions in China, especially during the winter. The CO concentration over eastern China is from both the local emissions (30% to 40%) and the transport from other regions. Likewise, the CO emissions in China have an important effect on the other regions of the world, but the effect is limited in the northern hemisphere. The local emissions in China also have an important effect on surface O3concentrations. During winter, the local emissions reduce the surface O3concentrations by 30 to 50%. During summer, the local emissions produce about 50 to 70% of the O3concentration in eastern China.