Annual Meeting, June , Istanbul, Turkey WP2: Data aggregation and products generation in the Atlantic Sea: results and criticalities EMODnet Chemistry With IFREMER, IEO, IHPT and RIHMI ‐ WDC contributions

Annual Meeting, June , Istanbul, Turkey Outline Data inventory of the second harvesting Data aggregation / validation phase : issues and solutions Regional data buffer : space and time distribution by parameter DIVA maps production

3/15 Data collected by MARIS robot (28/10/2014) : Data inventory (1) CDI type Vertical profiles Time Series Total New CDIS Updated CDIs Old CDIs Total Annual Meeting, June , Istanbul, Turkey

4/15 Data collected by MARIS robot (28/10/2014) : Data inventory (1) CDI type Vertical profiles Time Series Total New CDIS Updated CDIs Old CDIs Total More than twice the first harvesting ! Annual Meeting, June , Istanbul, Turkey

5/15 First harvesting Data inventory (2) Second harvesting Old Updated New Enlarged data coverage Annual Meeting, June , Istanbul, Turkey

6/15 Distribution by partners Annual Meeting, June , Istanbul, Turkey CDI type IEOIfremerIHPT RIHMI- NODC IMRUniHB New CDIs Updat ed CDIs Old CDIs Total Data inventory (3)

7/15 Annual Meeting, June , Istanbul, Turkey CDI typeIEOIfremerIHPT RIHMI- NODC IMRUniHB New CDIs Updated CDIs Old CDIs Total Data inventory (3) Distribution by partners

8/15 2 nd harvesting CDI type PhosAmonSilicateNox New CDIs Updated CDIs Old CDIs Total Annual Meeting, June , Istanbul, Turkey Distribution by parameters Data inventory (4)

9/15 Use only data with Quality Flag = 0, 1, 2, 6 as initial collection to use only good data Unit conversion and aggregation (P35 vocabs):  mol/l Deletion of empty lines in a station : some levels with no measurements for the parameter Deletion of lines with negative depth (incorrect missing value) Perform QC with ODV  Search for out of “broad range” values with Flag = 1  Set a QC for all measurements with Flag = 0  Set default values with Flag = 0, 1 to Flag = 9  Deal with Flag 6 and zero values Write a report on QC and send results to MARIS and data providers Quality Checks - common rules Annual Meeting, June , Istanbul, Turkey Data aggregation and QC

10/15 Quality checks – problems faced Problem of unit conversion : ug/l to umol/l  e.g. reload russian data and some spanish data Problem in CDI updating  e.g.high spanish Phosphate to delete Some of the reported errors to data centres have not been corrected :  we cannot just import the new collection in the collection built up after the first harvesting.  We have to re-make the whole QC work. Annual Meeting, June , Istanbul, Turkey Data aggregation and QC

11/15 Annual Meeting, June , Istanbul, Turkey Data aggregation and QC  5 Aggregated Data Collection Qced produced and sent to MARIS : -Phosphate : Global_PHOS_collection.txt -Ammonium : Global_AMON_collection.txt -Nox : Global_NOX_collection.txt -Silicate : Global_SLCA_collection.txt -Timeseries of these 4 parameters : Global_nutrients_TS_CDIs.txt

12/15 Perform QC with ODV  Search for out of range values with Flag = 1  Set a QC for all measurements with Flag = 0  Set default values with Flag = 0, 1 to Flag = 9  Deal with Flag 6 and zero values Annual Meeting, June , Istanbul, Turkey Data aggregation and QC Annual Meeting, June , Istanbul, Turkey

13/15 Flag value PHOS Before QC PHOS after QC total Annual Meeting, June , Istanbul, Turkey Data aggregation and QC Perform QC on New Phosphate with ODV  Search for out of range values with Flag = 1  Set a QC for all measurements with Flag = 0  Set default values with Flag = 0, 1 to Flag = 9  Deal with Flag 6 and zero values

14/15 Regional data buffer Annual Meeting, June , Istanbul, Turkey Phosphate data a) Station map d) Data bins e) X/Y distributionf) Season histogram b) Vertical plot c) Time histogram

15/15 Nox data a) Station map d) Data binse) X/Y distributionf) Season histogram b) Vertical plot c) Time histogram Annual Meeting, June , Istanbul, Turkey Regional data buffer

16/15 Annual Meeting, June , Istanbul, Turkey Silicate data a) Station map d) Data binse) X/Y distributionf) Season histogram b) Vertical plot c) Time histogram Regional data buffer

17/15 Annual Meeting, June , Istanbul, Turkey Regional data buffer Ammonium data a) Station map d) Data binse) X/Y distributionf) Season histogram b) Vertical plot c) Time histogram

18/15 Annual Meeting, June , Istanbul, Turkey DIVA maps production DIVA maps settings : settingsAtlantic area DIVA version weighting patch Time period10-years running periods with yearly step for the 4 seasons Time range Seasonswinter (0103), spring (0406), summer (0709), autumn (1012) Vertical layersIODE standards (33 levels) parametersPO4, SiO4, Nox

19/15 Annual Meeting, June , Istanbul, Turkey Problems faced : Some difficulties in installing DIVA on a Window PC via cygwin : inconsistencies between netcdf and gfortran librairies Handle the different steps to produce an analyse Optimizing the parameter estimation:  Do not run on the 46 periods – 4 seasons  chose a decade with high coverage  Some SN profiles very noisy  test binning and weighting options Very long time-consuming runs  reduce the space and time resolution Pb of generation of the big 4D netcdf file from the 3D files DIVA maps production

20/15 Annual Meeting, June , Istanbul, Turkey DIVA maps production Phosphate at surface (0m) – summer (0709) DIVA – 2005/2014 WOA – 1955/2012

21/15 Annual Meeting, June , Istanbul, Turkey DIVA maps production Phosphate at surface (0m) – summer (0709) DIVA 2005/2014 Data bins

22/15 Annual Meeting, June , Istanbul, Turkey DIVA maps production Silicate at surface (0m) – summer (0709) DIVA 2002/2011 WOA – 1955/2012

23/15 Annual Meeting, June , Istanbul, Turkey DIVA maps production Silicate at surface (0m) – summer (0709) DIVA 2002/2011 Data bins

Annual Meeting, June , Istanbul, Turkey Planning for the next weeks Data extraction (and weighting) Parameters optimization Run analysis Internal expert validation of products Phosphate Silicate Nox  DIVA maps production 4D Netcdf files ready

Annual Meeting, June , Istanbul, Turkey Planning for the next weeks Data extraction (and weighting) Parameters optimization Run analysis Internal expert validation of products Phosphate Silicate Nox If needed  DIVA maps production 4D Netcdf files ready

Annual Meeting, June , Istanbul, Turkey Planning for the next weeks Data extraction (and weighting) Parameters optimization Run analysis Internal expert validation of products Phosphate Silicate Nox If needed  DIVA maps production  Work with other parameters : oxygen, chlorophylle, … 4D Netcdf files ready

Thanks! Annual Meeting, June , Istanbul, Turkey