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European soil NOx emissions derived from satellite NO2 observations
  • +8
  • Xiaojuan Lin,
  • Ronald J. van der A,
  • Jos de Laat,
  • Vincent Huijnen,
  • Bas Mijling,
  • Jieying Ding,
  • Henk Eskes,
  • John Douros,
  • Mengyao Liu,
  • Xin Zhang,
  • Zhu Liu
Xiaojuan Lin
Tsinghua University

Corresponding Author:[email protected]

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Ronald J. van der A
KNMI
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Jos de Laat
Royal Netherlands Meteorological Institute
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Vincent Huijnen
KNMI
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Bas Mijling
KNMI Royal Netherlands Meteorological Institute
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Jieying Ding
KNMI Royal Netherlands Meteorological Institute
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Henk Eskes
Royal Netherlands Meteorological Institute
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John Douros
Royal Netherlands Meteorological Institute
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Mengyao Liu
Royal Netherlands Meteorological Institute
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Xin Zhang
SRON Netherlands Institute for Space Researc
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Zhu Liu
Tsinghua University
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Abstract

We introduce an innovative method to distinguish soil nitrogen oxides (NOx=NO+NO2) emissions from satellite-based total NOx emissions using its seasonal characteristics. To evaluate the approach, we compare the deviation between the tropospheric NO2 concentration observed by satellite and two atmospheric composition model simulations driven by the newly estimated soil NOx emissions and the Copernicus Atmosphere Monitoring Service (CAMS) inventory. The estimated average soil NOx emissions in Europe are 2.5 kg N ha-1 yr-1 in 2019, and the annual soil NOx emissions is approximately 2.5 times larger than that of the CAMS inventory. Our method can easily be extended to other regions at middle or high latitudes with similar seasonal characteristics of soil emissions. The soil emissions are subtracted from the total NOx emissions yielding realistic anthropogenic NOx emissions. We further show this also yields realistic anthropogenic CO2 emissions using known CO2/NOx factors from bottom-up inventories.
08 Dec 2023Submitted to ESS Open Archive
10 Dec 2023Published in ESS Open Archive