1. EDMODnet Chemistry, Baltic Sea - Oxygen, Chlorophyll and contaminants - General issues Magnus Wenzer, Lotta Fyrberg, Örjan Bäck Swedish Meteorological and Hydrological Institute - SMHI

2. The Baltic Sea region

3. Latest dataset for the Baltic Sea OxygenChlorophylDepth Total number of profiles 51 36018 47258 577 Total number of profiles (1990-) 40 65216 66846 657 Number of profiles with bad or suspicious data 1031526

4. Distribution of profiles by EDMO-code (O2 and Chl-a)

5. Handling of the dataset  Zip-files with ODV-files and metadata csv-file  Import into ODV, SeadDataNet formats…  Different collections  Merge collections  Aggregation to P35

6. ODV import ~51.000 profiles Missing value -999 (converted)

7. ODV Quality control of dataset (O2, Chl-a)  Many depths with flag 0  Wrong depth (below seafloor)  Sweden has reported negative O2 (calculated from H2S)  -999 as missing value  Wrong or invalid P01 codes

8. Oxygen

9. Chlorophyll-a

10. DIVA input  Periods: Ten years running average from 1960 (start) to 2014 (end)  Seasons: Winter (December - February) Spring (Mars - May) Summer (June - August) Autumn (September - November)  Depths: HELCOM standard depths, 0-300 (0-30 for chl?)  Quality flags: 1, 2, 6  Weighting option is applied  All negative values set to 0  Overlap data from the North Sea dataset added

11. Oxygen, winter, 0m 1980 - 1989 2000 - 2009 1990 - 1999

12. Oxygen, winter, 0m 1980 - 1989 2000 - 2009 1990 - 1999

13. Oxygen, winter, 0m 1980 - 1989 2000 - 2009 1990 - 1999

14. Oxygen, summer, 0m 1980 - 1989 2000 - 2009 1990 - 1999

15. Oxygen, summer, 50m 1980 - 1989 2000 - 2009 1990 - 1999

16. Oxygen, summer, 100m 1980 - 1989 2000 - 2009 1990 - 1999

17. Oxygen, autumn, deepest 1980 - 1989 2000 - 2009 1990 - 1999

18. Contaminants  A lot of variables  Many files with incorrect formats.  How to report contaminants in biota (primary variable)?  Depth profiles - With depth = 0  Time series - Best option today even if only on occasions  No “valid” primary variable

19. Main issues in results and workflow  A lot of variables. Risk of missing variables during aggregation if P01 not mapped to P35.  Choice of primary variable  Check and validate ODV files  Diva on oxygen without negative values. Not sure if anoxia is shown correctly.  Very time consuming to check all Diva products. Feedback is appreciated.  Diva settings – different results (correlation length etc.). Feedback is appreciated.

20. Test ODV-files, import in ODV Import > SeaDataNet Formats… Import > ODV Spreadsheet (or drag- and-drop) Import > SeaDataNet Formats…

21. Ongoing work  Run Diva on chlorophyll – Not sure about the coverage  Test Diva “from bottom” on oxygen  Send ODV Spreadsheet Files to MARIS  Upload nc-files to ftp  Create xml-files and upload to Sextant  Update old xml-files  Contaminants  Feedback to originators

22. Earlier work

23. Nitrate

24. Phosphate

25. Silicate

26. Diva examples, Phosphate, Spring, 0m 1990 - 19991992 - 2001 1994 - 2003

27. Diva examples, Phosphate, Summer, 0m 1990 - 19991992 - 2001 1994 - 2003

28. Diva examples, Phosphate, Autumn, 0m 1990 - 19991992 - 2001 1994 - 2003

29. Diva examples, Silicate, Spring, 0m 1990 - 19991992 - 2001 1994 - 2003

30. Diva examples, Silicate, Summer, 0m 1990 - 19991992 - 2001 1994 - 2003

31. Diva examples, Silicate, Autumn, 0m 1990 - 19991992 - 2001 1994 - 2003