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QC1 : range check on 94 parameters; step/freeze/drift check on 44 parameters;

KVALOBS The quality assurance system of the Norwegian Meteorological Institute surface observations Gabriel Kielland. QC1 : range check on 94 parameters; step/freeze/drift check on 44 parameters; 181 formal consistency checks on 36 parameters;

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QC1 : range check on 94 parameters; step/freeze/drift check on 44 parameters;

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  1. KVALOBSThe quality assurance system of the Norwegian Meteorological Institute surface observationsGabriel Kielland

  2. QC1: range check on 94 parameters; • step/freeze/drift check on 44 parameters; • 181 formal consistency checks on 36 parameters; • 97 climatological consistency checks on 19 parameters; • comparison with numerical prognosis on 9 parameters; • 2 checks on ship's position. + • QC2:dip check with automatic correction; • statistical control, i.e. significant deviation from monthly frequency distribution relative to neighbouring stations';automated distribution of collected measurements++

  3. Interpolation:There are always two observation values available for the end user: • The observation as received from the station ("original") and • an observation value considered best measuring the actual condition ("corrected"). • In most instances the two values are identical. Otherwise the corrected values may be one of: A short term HIRLAM prediction value; An interpolated value using the Akima algorithm; A missing value when the original is missing or rejected, and no interpolation; • A value manually entered using the HQC application.

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