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UV index KNMI
August 2002 to April 2012 validated
UV dose KNMI
August 2002 to April 2012 validated
*): some restrictions on data use, see product details (click on institute)
UV dose by KNMI (last update: 19 February 2019)
available data Data from August 2002 to April 2012 are available. Data can be accessed via the TEMIS website.
point of contact Jos van Geffen
algorithm description The algorithm is described on the TEMIS website.
product details The current software version is version 2.0. Further details can be found on the TEMIS website.
validation results The TEMIS UV index and UV dose operational data products are based on operational global ozone field data, derived from SCIAMACHY ozone measurements. Data version 1.4 has been validated extensively against groundbased measurements at Thessaloniki (Zempila et al., 2017) [PDF]. For cloud-free days differences are found to be around 1%, with standard deviation of 11-13%. For all-sky situations, i.e. including cloudiness, the TEMIS data is about 12% higher (with R^2 = 0.92). Data version 2.0 is an upgrade from v1.4 (e.g. higher spatial resolution) which does not affect the method itself, hence the validation results also hold for v2.0.

SCIAMACHY UV dose (KNMI) validation literature:
  • TEMIS UV product validation using NILU-UV ground-based measurements in Thessaloniki, Greece
    Zempila, M.-M., J.H.G.M. van Geffen, M. Taylor, I. Fountoulakis, M.-E. Koukouli, M. van Weele, R.J. van der A, A. Bais, C. Meleti and D. Balis
    Abstract/Article: Atmos. Chem. Phys. 17, 7157-7174, 2017
    Product: UV index and dose
    Institute: KNMI
    Method: Validation using ground-based observations as reference

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