Monitoring Air Quality from Space: The Case for the Geostationary Platform

W. A. Lahoz Norsk Institutt for Luftforskning, Norway, and Météo-France, CNRM/GMGEC/CARMA, Toulouse, France

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V.-H. Peuch Météo-France, CRNM/GMGEC/CARMA, Toulouse, France

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J. Orphal Karlsruhe Institute of Technology, IMK, Karlsruhe, Germany

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J.-L. Attié Météo-France, CNRM/GMGEC/CARMA, and Laboratoire d'Aérologie, Université de Toulouse, CNRS/INSU, Toulouse, France

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K. Chance Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts

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X. Liu Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts

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D. Edwards National Center for Atmospheric Research,* Boulder, Colorado

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H. Elbern Rhenish Institute for Environmental Research, University of Cologne, Köln, Germany, and Institute of Energy and Climate Research (Troposphere), Forschungszentrum Jülich, Jülich, Germany

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J.-M. Flaud Laboratoire Interuniversitaire des Systèmes Atmosphériques, CNRS UMR 7583, Université de Paris-Est, Créteil, France

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M. Claeyman Météo-France, CNRM/GMGEC/CARMA, and Laboratoire d'Aérologie, Université de Toulouse, CNRS/INSU, Toulouse, France

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L. El Amraoui Météo-France, CRNM/GMGEC/CARMA, Toulouse, France

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Air quality (AQ) is defined by the atmospheric composition of gases and particulates near the Earth's surface. This composition depends on local emissions of pollutants, chemistry, and transport processes; it is highly variable in space and time. Key lower-tropospheric pollutants include ozone, aerosols, and the ozone precursors NOx and volatile organic compounds. Information on the transport of pollutants is provided by carbon monoxide measurements. Air quality impacts human society, because high concentrations of pollutants can have adverse effects on human health; health costs attributable to AQ are high. The ability to monitor, forecast, and manage AQ is thus crucial for human society. In this paper we identify the observational requirements needed to undertake this task, discuss the advantages of the geostationary platform for monitoring AQ from space, and indicate important challenges to overcome. We present planned geostationary missions to monitor AQ in Europe, the United States, and Asia, and advocate for the usefulness of such a constellation in addition to the current global observing system of tropospheric composition.

*The National Center for Atmospheric Research is sponsored by the National Science Foundation.

Air quality (AQ) is defined by the atmospheric composition of gases and particulates near the Earth's surface. This composition depends on local emissions of pollutants, chemistry, and transport processes; it is highly variable in space and time. Key lower-tropospheric pollutants include ozone, aerosols, and the ozone precursors NOx and volatile organic compounds. Information on the transport of pollutants is provided by carbon monoxide measurements. Air quality impacts human society, because high concentrations of pollutants can have adverse effects on human health; health costs attributable to AQ are high. The ability to monitor, forecast, and manage AQ is thus crucial for human society. In this paper we identify the observational requirements needed to undertake this task, discuss the advantages of the geostationary platform for monitoring AQ from space, and indicate important challenges to overcome. We present planned geostationary missions to monitor AQ in Europe, the United States, and Asia, and advocate for the usefulness of such a constellation in addition to the current global observing system of tropospheric composition.

*The National Center for Atmospheric Research is sponsored by the National Science Foundation.

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