1. Generation of data products in the Mediterranean Sea
EMODnet Chemistry 3 Final Meeting, Madrid, Spain, 29th – 31st January, 2019
Generation of data products in the Mediterranean Sea
S.Iona,
M. Tsompanou
HCMR,

2. Products in Mediterranean Sea
Harmonised, aggregated and validated data collections for:
eutrophication
contaminants
Basin DIVA maps for nutrients, chlorophyll and oxygen.
High resolution DIVA maps for nutrients near rivers mouths (not yet).

3. 28 CDI partners, 19 countries, 96 originators

4. Eutrophication data
Nov. 2017, eutrophication data harvest, by MARIS, using a robot Harvester system.
Nov. 2017, Data aggregation:
in case of Mediterranean the aggregation was done by R. Schlitzer, with the latest ODV5.0 beta in communication with the coordinators & regional leader on which P35 terms to include.
Mar. 2018, Quality control and data validation using ODV5.
Oct. 2018, Creation of the interpolated basin maps, using DIVA (v4.7.2) and the corresponding metadata for the Sextant product catalogue service (DOIs included).

5. Eutrophication data 4 aggregated collections: Non-Restricted Data
Profiles (54%)
Time series (6%)
Restricted Data
Profiles (36%)
Time series (4%)

6. Eutrophication Profiles - geographical distribution
Parameters
Number of profiles
Number of points
Period
Ammonium [umol/l]
7215
41721
Chlorophyll-a [mg/m^3]
17267
Dissolved oxygen concentration [umol/l]
48482
Nitrate [umol/l]
13792
108923
Nitrate plus nitrite [umol/l]
1523
14742
Nitrite [umol/l]
12975
91858 pH
15189
228259
Phosphate [umol/l]
15758
117267
Silicate [umol/l]
13892
106650
Total nitrogen [umol/l]
1032
2316
Total phosphorus [umol/l]
1383
3196
Non restricted profiles:
60876
Parameters
Number of profiles
Number of points
Period
Ammonium [umol/l]
6955
21463
Chlorophyll-a [mg/m^3]
9048
296995
Dissolved oxygen concentration [umol/l]
25983
Nitrate [umol/l]
6040
25905
Nitrate plus nitrite [umol/l]
5845
27863
Nitrite [umol/l]
8633
34503 pH
11137
262204
Phosphate [umol/l]
13386
59825
Silicate [umol/l]
11141
54473
Total nitrogen [umol/l]
2114
3032
Total phosphorus [umol/l]
2924
5297
Restricted profiles:
40650

7. Eutrophication Times Series- geographical distribution
Parameters
Number of positions
Number of points
Period
Ammonium [umol/l]
3612
47001
Chlorophyll-a [mg/m^3]
1537
119672
Dissolved oxygen concentration [umol/l]
4638
218067
Nitrate [umol/l]
3293
30467
Nitrate plus nitrite [umol/l]
2259
10764
Nitrite [umol/l]
3284
30418 pH
3684
137526
Phosphate [umol/l]
3728
49299
Silicate [umol/l]
2454
39454
Total alkalinity [mEquiv/l]
1981
5996
Total nitrogen [umol/l]
1001
3611
Total phosphorus [umol/l]
2665
28409
Non restricted Time series: 6415
Restricted Time series: 3921
Parameters
Number of positions
Number of points
Period
Ammonium [umol/l]
3146
5335
Chlorophyll-a [mg/m^3] 1
4932
2016
Dissolved oxygen concentration [umol/l]
3616
48624
Nitrate [umol/l]
3155
5420
Nitrate plus nitrite [umol/l]
2748
3637
Nitrite [umol/l]
3103 pH
2995
5397
Phosphate [umol/l]
3099
5298
Silicate [umol/l]
3140
5357
Total alkalinity [mEquiv/l]
471
1748
Total nitrogen [umol/l]
3062
5013
Total phosphorus [umol/l]
3014
4965

8. Eutrophication data – Quality Control
The most common format error: 2 parameters with same code and different unit
NUMBER ODV FILES
COMMENTS
248
Header line. 'WC_dissO2’ is not in the semantic header. 94
Header line. 'PON' is not in the semantic header. 36
Header line. 'POC' is not in the semantic header. 31
No data found. 1
Multiple LOCAL_CDI_ID; no depth values.
Header line (line=21). 'AKTH' is not in the semantic header.
same code (P01) different units (P06)
Columns headers & metadata columns in same row
375 ODV files were not initially imported in ODV, but in contact with the originators, more than 90% corrected and imported to the collections

9. Eutrophication data – Quality Control
Checks for:
Zero values => Flag = 6 or 4
Negative values => Flag = 4
Out of range values => Flag = 4
“Stuck” values => Flag = 4
Null values => Flag = 4
Values with flag = 0
Nitrate < Nitrite

10. Eutrophication data - QC feedback loop
In total: 19 from 23 of EDMO CDI partners needed correction
15 partners have responded and corrected/are correcting their data:
OGS, Italy
CNR (ISMAR), Italy
HCMR, Greece
IEO, Spain
MI, Ireland
IFREMER, France
RIHMI-WDC, Russian Fed.
IMS, Turkey
UMT.IOI.POU, Malta
IMBK, Montenegro
NIB, Slovenia
IOLR, Israel
ORION, OC-UCY, Cyprus
ISRAMAR, Israel
IOF, Croatia
Still:
2 partners to respond
contact persons from CNR-ISMAR-SP, ISAC to be identified by the RL

11. Eutrophication data – Quality Control
At the vertical profiles, in more than 2,000,000 measurements points the Quality Flags (QFs) were corrected.

12. DIN Product Calculated from NO3 + NO2 + NH4 or NOX + NH4 (or DIN existed in original data)
Profiles
Parameters
Number of profiles
Ammonium [umol/l]
14170
Nitrate [umol/l]
18634
Nitrate plus nitrite [umol/l]
7239
Nitrite [umol/l]
20506
DIN original [umol/l]
3928
DIN [umol/l]
15337
TimeSeries
Parameters
Number of profiles
Ammonium [umol/l]
6743
Nitrate [umol/l]
6448
Nitrate plus nitrite [umol/l]
4992
Nitrite [umol/l]
6387
DIN original [umol/l]
122
DIN [umol/l]
6663 12

13. Basin DIVA maps for Eutrophication
5 DIVA (v4.7.2) products in Mediterranean, moving 6 years averages:
log(data)-exp(analysis)" transformation applied to the data prior to the analysis.
S/N=1
Background field: the data mean value is subtracted from the data.
Correlation length was optimized and filtered vertically and a seasonally-averaged profile was used.
1∕8° × 1∕8° output regular grid resolution.
Parameter
From year – to year
Nb of seasons
Depth interval (m)
Phosphates to 4
0-1500
Silicate to
Dissolved oxygen to
0-2000
DIN to
0-1100
Chlorophyll-a to
0-1000

14. ec.oceanbrowser.net/emodnet/

15. Contaminant data The process workflow included:
Oct. 2018, Contaminant data harvest, by MARIS, using a robot Harvester system.
Received ≈ odv txt files.
Due to wrong primary variables, we manually separated the odv txt files in matrices (Water, Sediment, Biota).
Corrected format errors.
Data harmonization using the new version of ODV (V5) dedicated to harmonization.
Quality control: only negative and null values.

16. Contaminant data
* Same P01 with different local name and different unit
** One P01 with one local name and one agreed unit

17. Biota Contaminant, 598 CDIs, 1979-2017
Initial P01: P01 before Harmonization, Total P01: Total P01 after Harmonization, Harm. P01: P01 which was harmonized after Harmoniazation, Non Harm. P01: P01 which was not harmonized after Harmonization.
Non harmonized P01 is P01 which were not in emodnet chemistry contaminant scope, were last minute correction of the partners and will be add in next face.
8/26/2019

18. Water Contaminant, 2667 CDIs, 1974-2015

19. Sediment Contaminant data
Profile data,
3979 cdis,
Time series data, 3485 cdis,

20. QC- Format Errors in Contaminants
Format errors in 9 from 19 partners:
txt files which are zip files
files without data header
files without or wrong primary variable (sediment data with water depth/pressure instead of sediment depth –COREDIST)
biota data in wrong file type (profile instead of timeseries)
wrong units and/or P01

21. QC- data and QF errors in Contaminants
QF errors in 2 from 19 partners
QC checked applied to the data:
missing and negative values (according to the group decisions)
Results: 472 values from 141 CDIs with
values with flag 6
negative values with flag 1
New flag = 4

22. QC feedback loop in Contaminants
7 from 9 partners have responded and corrected/are correcting their data
OGS – CNR
IEO
IOF
ORION, OC-UCY
ISRAMAR – IOLR
IFREMER – BRGM
NIB
Still
1 provider to be contacted
contact person from RIHMI-RAS, EDMO 4483 to be identified by the RL