Constraints on surface NOx emissions by assimilating satellite observations of multiple species
Constraints on surface NOx emissions by assimilating satellite observations of multiple species
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DOI：
10.1002/grl.50894
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发表时间：
2013-09
影响因子：
5.2
通讯作者：
K. Miyazaki;H. Eskes
中科院分区：
文献类型：
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作者：
K. Miyazaki;H. Eskes
地面氮氧化物的排放量估计的卫星观测的NO2，CO，O3和HNO 3与全球化学传输模式相结合的同化。除NO2外的其他物质的测量结果的同化通过调整影响NOx化学的物质浓度对NOx排放提供了额外的限制，并导致区域月平均排放量变化为-58%至+32%，年总排放量变化为-16%至+3%。这些大的变化突出表明，模型化学的不确定性影响了排放量估计的质量。仅在NO2观测反演中，NOx分析增量发生在更接近表面的位置。由于停留时间较短，与多物种同化相比，需要更大的排放增量。与独立观测和最近的亚洲区域排放清单2.1版排放的比较验证表明，多物种同化改善了化学一致性，包括浓度和估计排放量之间的关系。
Surface NOx emissions are estimated by a combined assimilation of satellite observations of NO2, CO, O3, and HNO3 with a global chemical transport model. The assimilation of measurements for species other than NO2 provides additional constraints on the NOx emissions by adjusting the concentrations of the species affecting the NOx chemistry and leads to changes in the regional monthly‐mean emissions of −58 to +32% and the annual total emissions of −16 to +3%. These large changes highlight that uncertainties in the model chemistry impact the quality of the emission estimates. In the inversion from NO2 observations only, NOx analysis increments occur closer to the surface. Because of the shorter residence time, larger emissions increments are required compared to the multiple species assimilation. Validation against independent observations and comparisons with the recent Regional Emission inventory in Asia version 2.1 emissions shows that the multiple species assimilation improves the chemical consistency including the relation between concentrations and the estimated emissions.