EGU21-7729, updated on 04 Mar 2021
EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Satellite based county- to provincial-level ammonia emissions estimates

Enrico Dammers1, Mark Shephard2, Evan White2,3, Debora Griffin2, Evan Chow2,3, Vitali Fioletov2, Shailesh Kharol2, Karen Cady-Pereira4, Shelley van der Graaf1,5, Janot Tokaya1, Martijn Schaap1, and Chris McLinden2
Enrico Dammers et al.
  • 1TNO, Netherlands Organisation for Applied Scientific Research, Climate Air and Sustainability, Utrecht, Netherlands
  • 2Environment and Climate Change Canada, Toronto, Ontario M3H 5T4, Canada
  • 3University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
  • 4Atmospheric and Environmental Research (AER), Lexington, Massachusetts, USA
  • 5Vrije Universiteit Amsterdam, Amsterdam, The Netherlands

While ammonia (NH3) at its current levels is known to be a hazard to environmental and human health, the atmospheric budget is still quite uncertain. This can largely be attributed to the short lifetime of ammonia in combination with an overall lack of (dense) in-situ measurement networks. The capability to observe ammonia distributions with satellites has opened new ways to study the atmospheric ammonia budget. Previous studies have demonstrated the capability of current ammonia satellite sensors to resolve emissions from point like sources, biomass burning, and constraining emission sources at a regional level with methods involving the use of air quality models.

In this study, we present the first spatially resolved ammonia emission estimates across the globe using a consistent methodology based solely on ammonia satellite observations from the Cross-track Infrared Sounder (CrIS) instrument and ECMWF ERA5 wind fields. The concept was evaluated for North Western Europe and demonstrated the ability to constrain annual emissions at county- to provincial-levels with most deviations within the bounds found in the error analysis. Furthermore, we show that for some regions the spatial patterns found in the satellite observations are consistent while others do not match the current inventories. Finally, the results indicate that the absolute emission levels tend to be underestimated for parts of the globe.

How to cite: Dammers, E., Shephard, M., White, E., Griffin, D., Chow, E., Fioletov, V., Kharol, S., Cady-Pereira, K., van der Graaf, S., Tokaya, J., Schaap, M., and McLinden, C.: Satellite based county- to provincial-level ammonia emissions estimates, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-7729,, 2021.

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