NOx emissions in East China, YRD (TROPOMI)

Daily NOx surface emission estimates derived from TROPOMI observations of tropospheric NO2 columns by the DECSO algorithm, version 6.1.

Select instrument: 
  satellite data at TEMIS 

Download DECSO v6.1

Monthly NOx emissions for 2019 | 2020

Download JSEI (Jiangsu Ship Emission Inventory)

Monthly NOx ship emissions for the Yangtze River on 0.1 degree resolution | 0.25 degree resolution

Data Version and Issues

Information about the data versions can be found here. The emission estimates are still in an experimental phase, and should be used with care.


If you used DECSO NOx emission data for a publication (research or otherwise), or for any other purpose, please refer to the following publication:

For DECSO version 6.1:

  • Soon to be written. In the meanwhile refer to version 5.2.

For JSEI ship emissions:

  • Xiumei Zhang, Ronald van der A, Jieying Ding, Xin Zhang, and Yan Yin, Significant contribution of inland ships to the total NOx emissions along the Yangtze River, ACP, under review.

For DECSO version 5.2-superobservations:

  • Ding, J., R.J. van der A, H.J. Eskes, B. Mijling, T. Stavrakou, J.H.G.M. van Geffen, J.P. Veefkind, Chinese NOx emission reductions and rebound as a result of the COVID-19 crisis quantified through inversion of TROPOMI NO2 observations. Geophysical Research Letters, 2020

For DECSO version 5.1qa:

  • Ding, J., van der A, R. J., Mijling, B., Jalkanen, J.-P., Johansson, L. and Levelt, P. F., Maritime NOx emissions over Chinese seas derived from satellite observations. Geophysical Research Letters, 45., 2018

For older versions:

  • Ding, J., R.J. van der A, B. Mijling and P.F. Levelt, Space-based NOx emission estimates over remote regions improved in DECSO Atmospheric Measurement Techniques, 2017, 10, 925-938, doi:10.5194/amt-10-925-2017.

For validation results:

  • Ding, J., Miyazaki, K., van der A, R.J., Mijling, B., Kurokawa, J., Cho, S., Janssens-Maenhout, G., Zhang, Q., Liu, F., and Levelt, P.F., Intercomparison of NOx emission inventories over East Asia Atm. Chem. Phys., 2017, 17, 10125-10141,


  • Ding, J., R.J. van der A, B. Mijling, P.F. Levelt, and N. Hao (2015). NOx emission estimates during the 2014 Youth Olympic Games in Nanjing. Atmos. Chem. Phys., 15, 9399-9412, doi:10.5194/acp-15-9399-2015.
  • Mijling, B., R.J. van der A, R. J., and Q. Zhang (2013). Regional nitrogen oxides emission trends in East Asia observed from space. Atmos. Chem. Phys., 13, 12003-12012, doi:10.5194/acp-13-12003-2013. [pdf]
  • Mijling, B. and R. van der A (2012). Using daily satellite observations to estimate emissions of short-lived air pollutants on a mesoscopic scale. J. Geophys. Res. 117, D17, doi:10.1029/2012JD017817.
  • Mijling, B., R. van der A, K. Boersma, M. Van Roozendael, I. De Smedt, and H. Kelder (2009). Reductions of NO2 detected from space during the 2008 Beijing Olympic Games. Geophys. Res. Lett. 36, L13801.

Data provider

   Royal Netherlands Meteorological Institute (KNMI)  • contact person: Ronald van der A