Quality Control of Biogeochemical Measurements

Previous versions of this document and up to version 2.5 were generated during MyOcean, MyOcean2 and MyOceanFO EU-projects. Starting in CMEMS, several updates have been performed but not officially released. Version 3.1 is the first official release within CMEMS with focus on chlorophyll-a fluorescence. The present Version 6 is the method used for the production of CMEMS INSITU_GLO_BGC_REP_OBSERVATIONS_013_046 release for the V4 of CMEMS in 2018. This document presents quality assessment tools that can be applied as soon as data are delivered to the CMEMS production units, as well as reprocessing tools. The latter requires a certain knowledge about the type and structure of the data in order to build the control quality test. In addition, a set of tools have been developed for the evaluation of the tests themselves and are likely to be applied on monthly and history repositories only. These evaluation tools are not expected to be implemented at production unit (PU) level, but applied by experts and scientists. The resulting analysis should confirm or provide an upgrade of the quality control tests implemented at PU level.