1. Data aggregation and product generation in the North SEA

2. Last status: North SEAdata
stations (~2% removed as duplicates/non-target institutions)
Expected over 1 mio in EMODnet 3
7 Nutrients
With 20–28 different methods/units each!
(aggregated using P35)

3. Data handling so far – Nut’s
Aggregation using P35 for nutrients
Non-EMODNET data and QF>1 excluded (~2%)
All nutrients checked for <0 values, changed to 0
Checked if NOx + NH4 >TN (within uncertainty)
Checked if PO4>TP (within uncertainty)
Possibly add IN (sum of NOx and NH4) in EMODnet 3
Generated DIVA maps for nutrients averaged 10 years/4 seasons: Upgrade to 6 years/4 seasons in EMODnet 3
Generated DIVA maps for O2 and chlorophyll-a
Not enough data on pH etc.
QF 0, 1, 4, 8 available in dataset

4. QA: N IN > TN 120084 NH4+NOx+TN datapoints
<0,04 % fejl (0,01 for >10%)

5. QA: P OP > TP 1850: 1181 729 7 2x> 40 10%> 131 <10%
2006 x10, 2007 x1
1181
2005 x7, 2001 x2
729
The rest
datapoints
1850=BSH (tyskland)
1181=LANU, nu 2537 LLUR (tyskland)
729=NERI
<0,12% ”fejl” i data (0,03% for <10% fejl)

6. DIVA for Nox - vinter

7. DIVA for chlorophylL-a

8. DIVA for oxygen

9. All data products in sextant

10. Status for hazardous sub’s

11. Typical problems to solve
The sediment depth parameter filled with rubbish from some data providers – harmonisation needed
Checked for ”reasonable” concentration levels
Further clarification of P35 terms, unit conversions
Reporting as time trends, ocean_depth_profiles, sediment_depth_profiles, …
 difficult to aggregate properly

12. Product generation in 2017
Nutrients, Chlorophyll-a and O2 revisited with 6 years intervals to comply with MFSD and WFD timing
Hazardous substances products prepared after further discussions of how to generate CDIs and P35
Difficult to produce maps like nutrients due to coastal predisposition of the data from mussels…
First harvest of 2017 dataset in September/October…
– and training in new DIVA version!