1. Generation of data products in the Norwegian and Barents Seas
Ann Kristin
Østrem
Institute of Marine Research, Norway

2. Definition of the region
MSFD regions not defined in this area
Use ICES Ecoregions instead
Included the Arctic Ocean, Greenland Sea and Icelandic Waters
7/12/2019
Final meeting, Madrid, January 2019

3. Data overview – Eutrophication
Deleted duplicates and ferrybox data outside region
profiles from 8 CDI partners/ 42 data originators
Unrestricted: profiles. Restricted: 844 profiles
7/12/2019
Final meeting, Madrid, January 2019

4. Data overview - Eutrophication
Variable
Profiles
CDIs
Dissolved oxygen concentration
18 421
Dissolved oxygen saturation
1 151
Nitrate
26 291
26 291
Nitrate plus nitrite
311
Nitrite
26 134
Phosphate
35 800
Silicate
32 107
Ammonium
569
Chlorophyll-a
28 296
20 768
Phaeopigments
18 277
Total alkalinity
312
Dissolved inorganic carbon
105
Total phosphorus 34
Particulate organic carbon 40 pH
2 851
Particulate nitrogen 26
TOTAL
43 844
Partner (EDMO)
Profiles
CDIs
IMR (612)
25 182
RIHMI-WDC (681)
11 897
IFREMER (486)
2 856
ICES (730)
1 413
BODC (43)
1 403
SOI (723)
844
PANGAEA (3234)
233
BSH-DOD (96) 17 16
TOTAL
43 844
7/12/2019
Final meeting, Madrid, January 2019

5. QC of eutrophication data - typical errors
Empty ODV files (only header, no data)
Invalid P01/P06 codes
Duplicate stations
Zero values – below LOD/LOQ, or missing value??
Oxygen values 1/10 of normal (30 instead of 300), silicate 10 times higher than normal
Very low nitrate values – probably nitrite
CTD and ARGO data with many spikes
Negative values
Data with QF = 0 – no QC
QF = 2 used for bad data
In general:
Few errors in ODV file format
Data quality not always good, particularly for older data
New region in Phase III; can’t compare data coverage or quality with Phase II
7/12/2019
Final meeting, Madrid, January 2019

6. Data examples - Nitrate
Negative values and many spikes in CTD data
-9.98 and 0 used as missing value
Very low values – probably nitrite
Before QC:
After QC:
7/12/2019
Final meeting, Madrid, January 2019

7. Data examples - Silicate
-9.98 and 0 used as missing value
Values 10 times higher than the rest of the data
Before QC:
After QC:
7/12/2019
Final meeting, Madrid, January 2019

8. DIVA settings and issues
DIVA version 4.7.2
Data from Arctic region + overlapping data from North Sea
6-year periods: , , ... , (Chl-a starts in 1980)
IODE standard depths
Phosphate, silicate, oxygen: 30 layers ( m)
Chl-a: 14 layers (0-300 m)
4 seasons: Spring (March-May), summer (June-August), autumn (September-November) and winter (December-February)
Problems using DIVA
Spaces in file names (e.g. Water body dissolved oxygen concentration)
NCDFinfo file: Too many characters in one line – 4D netCDF file not created
Analysis with option 11
NaN in netCDF files for chlorophyll-a
7/12/2019
Final meeting, Madrid, January 2019

9. Final meeting, Madrid, 29-30 January 2019
DIVA maps - Parameters
DIVA maps created for all seasons for phosphate, silicate, oxygen and chlorophyll-a
DIN: Only 37 profiles (where we have both nitrate and ammonium)
-> not enough data for DIVA maps
7/12/2019
Final meeting, Madrid, January 2019

10. DIVA maps – data distribution
Distribution of data:
Spring: Most data along the Norwegian coast and continental shelf
Autumn: Most data in the Barents Sea (Ecosystem cruises)
Winter: Most in Norwegian fjords (not chl-a)
After 1990: No Russian data; IMR data in fixed transects
Oxygen:
No data in the Barents Sea
No IMR data after 2008
A lot of glider data in summer – problems in DIVA
DIVA gives too high values in fjords and in the White Sea
10x higher than the data values
Very difficult to find one method for DIVA maps generation that works for all parameters for all seasons and years
7/12/2019
Final meeting, Madrid, January 2019

11. DIVA maps – Chlorophyll-a distribution
Large differences in data coverage from season to season:
Spring
Summer
Autumn
Winter
7/12/2019
Final meeting, Madrid, January 2019

12. DIVA maps – Phosphate distribution
Large differences in data coverage from year to year
Less data after 1990
Winter – all years
Autumn – all years
Winter – >
Autumn – >
7/12/2019
Final meeting, Madrid, January 2019

13. DIVA maps – Some results
Phosphate – all seasons at 0 m:

14. DIVA maps – Some results
Phosphate – all seasons at 0 m:

15. DIVA maps – Some results
Phosphate – all seasons at 0 m:
7/12/2019

16. Contaminants in sediment
313 profiles
94 harmonized variables
7/12/2019
Final meeting, Madrid, January 2019

17. Final meeting, Madrid, 29-30 January 2019
Contaminants in water
1013 profiles
25 harmonized variables
7/12/2019
Final meeting, Madrid, January 2019