Qc2 Scientific Tasks

Status Draft

- to verify the results of QC2-checks - the redistribution to RR_24. Confirmation of the quality of results - rewiew of statistics? Or a separate analysis: Dataset should cover all country and both convective and frontal precipitation, and main circulation paterns (west-coast rain, central south-eastern rain, rain on nortwest coast, rain in Nordland/Troms, east Finnmark.)?

- to take active part in the general space-check algorithm.

- others?

Specification of algorithms and general guidelines.

Defintion of algorithms

Tests for interdependence, spatial correlation, pass and fail criteria ...

Strategies for interpolation in both space and time,

Use of station aspect, and other methods for the choice of the best neighbours

Spatial bivariate, multivariate, tests etc ...

Other statistical tests, regression techniques, appropriate residuals analysis, etc ...

...

General guidelines

Optimum number of points to include in an interpolation,

Recommended statistics (e.g. monthly averages, normals, medians etc ...) to use in comparison with data (e.g. for outlier checks etc., other quality controls)

Statistical checks to use for checking the performance of interpolation methods (e.g. see Algorithm Gallery)

Identification of regions that are best handled separately, e.g. North, South, East, West, Coastal, Interior, and the region variation with season

...

Other

Use of semivariograms in general as a method to assess spatial homogeneity

Automating kriging methods: calculation of semivariogram, fitting model, applying the kriging interpolator

Boundary detection

First definition of other algorithms involving satellite, radar data etc ...

General advice on priorities on particular algorithms etc. to develop

...

Verification/Case Analysis of the redistribution of the Qc2 accumulated precipitation algorithm

Original testing was carried out for data obtained between March 2007 and December 2007 giving rise to a comparison to real observations with simulated test data (constructed from real observations)...
... as well as a comparison to the results of HQC: