Impact of spaceborne carbon monoxide observations from the S-5P platform on tropospheric composition analyses and forecasts

Rachid Abida, Jean Luc Attié, Laaziz El Amraoui, Philippe Ricaud, William Lahoz, Henk Eskes, Arjo Segers, Lyana Curier, Johan De Haan, Jukka Kujanpaä, Albert Oude Nijhuis, Johanna Tamminen, Renske Timmermans, Pepijn Veefkind

    Research output: Contribution to journalArticlepeer-review

    14 Scopus citations

    Abstract

    We use the technique of Observing System Simulation Experiments (OSSEs) to quantify the impact of spaceborne carbon monoxide (CO) total column observations from the Sentinel-5 Precursor (S-5P) platform on tropospheric analyses and forecasts. We focus on Europe for the period of northern summer 2003, when there was a severe heat wave episode associated with extremely hot and dry weather conditions. We describe different elements of the OSSE: (i) the nature run (NR), i.e., the "truth" (ii) the CO synthetic observations; (iii) the assimilation run (AR), where we assimilate the observations of interest; (iv) the control run (CR), in this study a free model run without assimilation; and (v) efforts to establish the fidelity of the OSSE results. Comparison of the results from AR and the CR, against the NR, shows that CO total column observations from S-5P provide a significant benefit (at the 99% confidence level) at the surface, with the largest benefit occurring over land in regions far away from emission sources. Furthermore, the S-5P CO total column observations are able to capture phenomena such as the forest fires that occurred in Portugal during northern summer 2003. These results provide evidence of the benefit of S-5P observations for monitoring processes contributing to atmospheric pollution.

    Original languageBritish English
    Pages (from-to)1081-1103
    Number of pages23
    JournalAtmospheric Chemistry and Physics
    Volume17
    Issue number2
    DOIs
    StatePublished - 24 Jan 2017

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