Articles | Volume 9, issue 10
Research article
24 Oct 2016
Research article |  | 24 Oct 2016

Inverse modelling of NOx emissions over eastern China: uncertainties due to chemical non-linearity

Dasa Gu, Yuhang Wang, Ran Yin, Yuzhong Zhang, and Charles Smeltzer


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Short summary
We show in this study that the non-linearity of NOx chemistry implies that the local derivative (of a first-order Taylor expansion) is better suited in the inverse modelling of NOx emissions over eastern China. We used single-grid-cell-based perturbation sensitivity calculation. The method leads to smaller NOx emission over highly polluted regions and higher NOx emission over rural regions. There are also more consistent results from using two different satellite instruments.