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  • 1. Riihela, Aku
    et al.
    Carlund, Thomas
    SMHI, Core Services.
    Trentmann, Joerg
    Mueller, Richard
    Lindfors, Anders V.
    Validation of CM SAF Surface Solar Radiation Datasets over Finland and Sweden2015In: Remote Sensing, ISSN 2072-4292, E-ISSN 2072-4292, Vol. 7, no 6, p. 6663-6682Article in journal (Refereed)
    Abstract [en]

    Accurate determination of the amount of incoming solar radiation at Earth's surface is important for both climate studies and solar power applications. Satellite-based datasets of solar radiation offer wide spatial and temporal coverage, but careful validation of their quality is a necessary prerequisite for reliable utilization. Here we study the retrieval quality of one polar-orbiting satellite-based dataset (CLARA-A1) and one geostationary satellite-based dataset (SARAH), using in situ observations of solar radiation from the Finnish and Swedish meteorological measurement networks as reference. Our focus is on determining dataset quality over high latitudes as well as evaluating daily mean retrievals, both of which are aspects that have drawn little focus in previous studies. We find that both datasets are generally capable of retrieving the levels and seasonal cycles of solar radiation in Finland and Sweden well, with some limitations. SARAH exhibits a slight negative bias and increased retrieval uncertainty near the coverage edge, but in turn offers better precision (less scatter) in the daily mean retrievals owing to the high sampling rate of geostationary imaging.

  • 2. Riihela, Aku
    et al.
    Key, Jeffrey R.
    Meirink, Jan Fokke
    Munneke, Peter Kuipers
    Palo, Timo
    Karlsson, Karl-Göran
    SMHI, Research Department, Atmospheric remote sensing.
    An intercomparison and validation of satellite-based surface radiative energy flux estimates over the Arctic2017In: Journal of Geophysical Research - Atmospheres, ISSN 2169-897X, E-ISSN 2169-8996, Vol. 122, no 9, p. 4829-4848Article in journal (Refereed)
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