Journal cover Journal topic
Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/acp-2017-418
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
03 Jul 2017
Review status
This discussion paper is a preprint. A revision of this manuscript was accepted for the journal Atmospheric Chemistry and Physics (ACP) and is expected to appear here in due course.
Quantification of CO emissions from the city of Madrid using MOPITT satellite retrievals and WRF simulations
Iris Dekker1,2, Sander Houweling1,2, Ilse Aben1, Thomas Röckmann2, Maarten Krol1,2,3, Sara Martínez-Alonso4, Merritt Deeter4, and Helen Worden4 1SRON Netherlands Institute for Space Research, Utrecht, The Netherlands
2Institute for Marine and Atmospheric Research Utrecht, Utrecht University, The Netherlands
3Department of Meteorology and Air Quality, Wageningen University and Research Centre, Wageningen, The Netherlands
4National Center for Atmospheric Research (NCAR), Boulder, CO, USA
Abstract. The growth of mega-cities leads to air quality problems directly affecting the citizens. Satellite measurements are becoming of higher quality and quantity, which leads to more accurate satellite retrievals of the enhanced air pollutant concentrations over large cities. In this paper, we compare and discuss both an existing and a new method for estimating urban scale trends in CO emissions using multi-year retrievals from the MOPITT satellite instrument. The first method is mainly based on satellite data, which has the advantage of fewer assumptions, but also comes with uncertainties and limitations as shown in this paper. To improve the reliability of urban to regional scale emission trend estimation, we simulate MOPITT retrievals using the Weather Research and Forecast model with chemistry core (WRF-Chem). The difference between model and retrieval is used to optimize CO emissions in WRF-Chem, focusing on the city of Madrid, Spain. This method has the advantage over the existing method in that it allows both a trend analysis of CO concentrations and a quantification of CO emissions. Our analysis confirms thatMOPITT is capable of detecting CO enhancements overMadrid, although significant differences remain between the yearly averaged model output and satellite measurements (R2 = 0.75) over the city. After optimization, we find Madrid CO emissions to be lower by 48 % for 2002 and by 17 % for 2006 compared with the EdgarV4.2 emission inventory. The MOPITT derived emission adjustments lead to better agreement with the European emission inventory TNO-MAC-III for both years. This suggests that the downward trend in CO emissions over Madrid is overestimated in EdgarV4.2 and more realistically represented in TNO-MAC-III. However, our satellite and model based emission estimates have large uncertainties, around 20 % for 2002 and 50 % for 2006.

Citation: Dekker, I., Houweling, S., Aben, I., Röckmann, T., Krol, M., Martínez-Alonso, S., Deeter, M., and Worden, H.: Quantification of CO emissions from the city of Madrid using MOPITT satellite retrievals and WRF simulations, Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2017-418, in review, 2017.
Iris Dekker et al.
Interactive discussionStatus: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version      Supplement - Supplement
 
RC1: 'Review of Dekker et al.', Anonymous Referee #1, 25 Jul 2017 Printer-friendly Version 
AC1: 'Response to review', Iris Dekker, 26 Sep 2017 Printer-friendly Version Supplement 
 
RC2: 'Review of Dekker et al.', Anonymous Referee #2, 10 Aug 2017 Printer-friendly Version 
AC2: 'Response to review', Iris Dekker, 26 Sep 2017 Printer-friendly Version Supplement 
Iris Dekker et al.
Iris Dekker et al.

Viewed

Total article views: 236 (including HTML, PDF, and XML)

HTML PDF XML Total BibTeX EndNote
180 53 3 236 5 2

Views and downloads (calculated since 03 Jul 2017)

Cumulative views and downloads (calculated since 03 Jul 2017)

Viewed (geographical distribution)

Total article views: 236 (including HTML, PDF, and XML)

Thereof 234 with geography defined and 2 with unknown origin.

Country # Views %
  • 1

Saved

Discussed

Latest update: 19 Nov 2017
Publications Copernicus
Download
Short summary
This study estimates carbon monoxide emissions from the city of Madrid using MOPITT satellite data. There are two methods used and reviewed in this paper, a method that can only estimate a trend in the emission, as used by an earlier paper, and a newly developed method that also includes model data from WRF-Chem to quantify emission. We find Madrid CO emissions to be lower by 48% for 2002 and by 17 % for 2006 compared with the EdgarV4.2 emission inventory but uncertainty (20 %–50 %) remains.
This study estimates carbon monoxide emissions from the city of Madrid using MOPITT satellite...
Share