Articles | Volume 9, issue 10
Atmos. Meas. Tech., 9, 5193–5201, 2016
https://doi.org/10.5194/amt-9-5193-2016
Atmos. Meas. Tech., 9, 5193–5201, 2016
https://doi.org/10.5194/amt-9-5193-2016

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 et al.

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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.